/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf -i ../../../trunk/examples/svcomp/pthread/triangular-longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-60655ea [2020-09-15 01:12:16,877 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-15 01:12:16,890 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-15 01:12:16,941 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-15 01:12:16,941 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-15 01:12:16,950 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-15 01:12:16,953 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-15 01:12:16,958 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-15 01:12:16,962 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-15 01:12:16,965 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-15 01:12:16,969 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-15 01:12:16,970 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-15 01:12:16,970 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-15 01:12:16,974 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-15 01:12:16,978 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-15 01:12:16,980 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-15 01:12:16,982 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-15 01:12:16,984 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-15 01:12:16,987 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-15 01:12:16,996 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-15 01:12:16,998 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-15 01:12:17,000 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-15 01:12:17,001 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-15 01:12:17,002 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-15 01:12:17,016 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-15 01:12:17,032 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-15 01:12:17,033 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-15 01:12:17,035 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-15 01:12:17,039 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf [2020-09-15 01:12:17,086 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-15 01:12:17,086 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-15 01:12:17,089 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-15 01:12:17,089 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-15 01:12:17,090 INFO L138 SettingsManager]: * Use SBE=true [2020-09-15 01:12:17,090 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-15 01:12:17,091 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-15 01:12:17,091 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-15 01:12:17,091 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-15 01:12:17,091 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-15 01:12:17,093 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-15 01:12:17,093 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-15 01:12:17,093 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-15 01:12:17,094 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-15 01:12:17,094 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-15 01:12:17,094 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-15 01:12:17,094 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-15 01:12:17,095 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-15 01:12:17,095 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-15 01:12:17,095 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-15 01:12:17,095 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-15 01:12:17,095 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-15 01:12:17,096 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-15 01:12:17,096 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-09-15 01:12:17,096 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-15 01:12:17,096 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-15 01:12:17,097 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-15 01:12:17,097 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-09-15 01:12:17,097 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-15 01:12:17,597 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-15 01:12:17,629 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-15 01:12:17,634 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-15 01:12:17,637 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-15 01:12:17,638 INFO L275 PluginConnector]: CDTParser initialized [2020-09-15 01:12:17,639 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-1.i [2020-09-15 01:12:17,764 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2b0bd56e2/17f4934f9bcc4a2c967ae8ab5b6771d3/FLAG5a2b53ef3 [2020-09-15 01:12:18,478 INFO L306 CDTParser]: Found 1 translation units. [2020-09-15 01:12:18,480 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread/triangular-longer-1.i [2020-09-15 01:12:18,523 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2b0bd56e2/17f4934f9bcc4a2c967ae8ab5b6771d3/FLAG5a2b53ef3 [2020-09-15 01:12:18,729 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2b0bd56e2/17f4934f9bcc4a2c967ae8ab5b6771d3 [2020-09-15 01:12:18,745 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-15 01:12:18,752 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-09-15 01:12:18,754 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-15 01:12:18,754 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-15 01:12:18,760 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-15 01:12:18,761 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 01:12:18" (1/1) ... [2020-09-15 01:12:18,768 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@222089f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:12:18, skipping insertion in model container [2020-09-15 01:12:18,768 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 01:12:18" (1/1) ... [2020-09-15 01:12:18,780 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-15 01:12:18,857 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-15 01:12:19,455 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-15 01:12:19,475 INFO L203 MainTranslator]: Completed pre-run [2020-09-15 01:12:19,557 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-15 01:12:19,628 INFO L208 MainTranslator]: Completed translation [2020-09-15 01:12:19,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:12:19 WrapperNode [2020-09-15 01:12:19,629 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-15 01:12:19,632 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-15 01:12:19,632 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-15 01:12:19,633 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-15 01:12:19,645 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:12:19" (1/1) ... [2020-09-15 01:12:19,669 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:12:19" (1/1) ... [2020-09-15 01:12:19,695 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-15 01:12:19,696 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-15 01:12:19,696 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-15 01:12:19,696 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-15 01:12:19,706 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:12:19" (1/1) ... [2020-09-15 01:12:19,706 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:12:19" (1/1) ... [2020-09-15 01:12:19,709 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:12:19" (1/1) ... [2020-09-15 01:12:19,710 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:12:19" (1/1) ... [2020-09-15 01:12:19,717 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:12:19" (1/1) ... [2020-09-15 01:12:19,723 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:12:19" (1/1) ... [2020-09-15 01:12:19,726 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:12:19" (1/1) ... [2020-09-15 01:12:19,729 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-15 01:12:19,730 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-15 01:12:19,730 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-15 01:12:19,730 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-15 01:12:19,734 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:12:19" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-15 01:12:19,817 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-09-15 01:12:19,817 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-09-15 01:12:19,817 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-09-15 01:12:19,817 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-09-15 01:12:19,817 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-15 01:12:19,818 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-09-15 01:12:19,818 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-15 01:12:19,818 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-15 01:12:19,818 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-09-15 01:12:19,819 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-15 01:12:19,819 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-15 01:12:19,822 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-09-15 01:12:20,210 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-15 01:12:20,210 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-15 01:12:20,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 01:12:20 BoogieIcfgContainer [2020-09-15 01:12:20,215 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-15 01:12:20,216 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-15 01:12:20,217 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-15 01:12:20,221 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-15 01:12:20,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.09 01:12:18" (1/3) ... [2020-09-15 01:12:20,222 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ac27690 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 01:12:20, skipping insertion in model container [2020-09-15 01:12:20,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:12:19" (2/3) ... [2020-09-15 01:12:20,223 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ac27690 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 01:12:20, skipping insertion in model container [2020-09-15 01:12:20,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 01:12:20" (3/3) ... [2020-09-15 01:12:20,225 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-longer-1.i [2020-09-15 01:12:20,238 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-15 01:12:20,239 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-15 01:12:20,250 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-15 01:12:20,251 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-15 01:12:20,282 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:12:20,283 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:12:20,283 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:12:20,283 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:12:20,286 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:12:20,287 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:12:20,287 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:12:20,287 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:12:20,287 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:12:20,288 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:12:20,288 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:12:20,288 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:12:20,289 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:12:20,289 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:12:20,289 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:12:20,289 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:12:20,289 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:12:20,290 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:12:20,290 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:12:20,290 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:12:20,291 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:12:20,291 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:12:20,291 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:12:20,291 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:12:20,292 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:12:20,292 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:12:20,292 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:12:20,293 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:12:20,297 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:12:20,298 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:12:20,298 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:12:20,298 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:12:20,299 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:12:20,299 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:12:20,307 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:12:20,307 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:12:20,307 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:12:20,308 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:12:20,308 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:12:20,308 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:12:20,337 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-09-15 01:12:20,364 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-15 01:12:20,364 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-15 01:12:20,364 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-15 01:12:20,364 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-15 01:12:20,365 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-15 01:12:20,365 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-15 01:12:20,365 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-15 01:12:20,365 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-15 01:12:20,382 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-09-15 01:12:20,384 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-09-15 01:12:20,427 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-09-15 01:12:20,427 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-15 01:12:20,435 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-09-15 01:12:20,439 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-09-15 01:12:20,460 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-09-15 01:12:20,460 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-15 01:12:20,466 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-09-15 01:12:20,470 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 924 [2020-09-15 01:12:20,473 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-09-15 01:12:21,737 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-09-15 01:12:22,028 INFO L206 etLargeBlockEncoding]: Checked pairs total: 851 [2020-09-15 01:12:22,029 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2020-09-15 01:12:22,038 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-09-15 01:12:22,056 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-09-15 01:12:22,059 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-09-15 01:12:22,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-09-15 01:12:22,071 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:22,072 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-09-15 01:12:22,073 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:22,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:22,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-09-15 01:12:22,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:22,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059879196] [2020-09-15 01:12:22,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:22,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:22,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:22,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059879196] [2020-09-15 01:12:22,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 01:12:22,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-15 01:12:22,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048598055] [2020-09-15 01:12:22,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-15 01:12:22,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:22,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-15 01:12:22,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-15 01:12:22,429 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-09-15 01:12:22,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:22,528 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-09-15 01:12:22,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-15 01:12:22,531 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-09-15 01:12:22,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:22,553 INFO L225 Difference]: With dead ends: 75 [2020-09-15 01:12:22,553 INFO L226 Difference]: Without dead ends: 42 [2020-09-15 01:12:22,556 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-15 01:12:22,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-15 01:12:22,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-09-15 01:12:22,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-15 01:12:22,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-09-15 01:12:22,619 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-09-15 01:12:22,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:22,619 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-09-15 01:12:22,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-15 01:12:22,620 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-09-15 01:12:22,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-15 01:12:22,620 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:22,621 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:22,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-15 01:12:22,621 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:22,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:22,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-09-15 01:12:22,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:22,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058837200] [2020-09-15 01:12:22,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:22,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:22,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:22,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058837200] [2020-09-15 01:12:22,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 01:12:22,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-15 01:12:22,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869187408] [2020-09-15 01:12:22,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-15 01:12:22,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:22,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-15 01:12:22,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-15 01:12:22,786 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-09-15 01:12:22,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:22,829 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-09-15 01:12:22,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-15 01:12:22,830 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-15 01:12:22,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:22,831 INFO L225 Difference]: With dead ends: 56 [2020-09-15 01:12:22,831 INFO L226 Difference]: Without dead ends: 50 [2020-09-15 01:12:22,832 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-09-15 01:12:22,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-15 01:12:22,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-09-15 01:12:22,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-15 01:12:22,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-09-15 01:12:22,841 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-09-15 01:12:22,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:22,843 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-09-15 01:12:22,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-15 01:12:22,843 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-09-15 01:12:22,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-15 01:12:22,845 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:22,845 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:22,845 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-15 01:12:22,845 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:22,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:22,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-09-15 01:12:22,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:22,846 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942444523] [2020-09-15 01:12:22,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:22,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:22,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:22,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942444523] [2020-09-15 01:12:22,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 01:12:22,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-15 01:12:22,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373814357] [2020-09-15 01:12:22,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-15 01:12:22,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:22,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-15 01:12:22,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-15 01:12:22,975 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-09-15 01:12:23,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:23,069 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-09-15 01:12:23,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-15 01:12:23,070 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-15 01:12:23,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:23,072 INFO L225 Difference]: With dead ends: 78 [2020-09-15 01:12:23,072 INFO L226 Difference]: Without dead ends: 71 [2020-09-15 01:12:23,073 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-09-15 01:12:23,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-15 01:12:23,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2020-09-15 01:12:23,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-15 01:12:23,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-09-15 01:12:23,083 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10 [2020-09-15 01:12:23,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:23,083 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-09-15 01:12:23,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-15 01:12:23,083 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-09-15 01:12:23,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-15 01:12:23,084 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:23,085 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:23,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-15 01:12:23,085 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:23,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:23,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1669391335, now seen corresponding path program 2 times [2020-09-15 01:12:23,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:23,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533202723] [2020-09-15 01:12:23,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:23,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:23,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:23,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533202723] [2020-09-15 01:12:23,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 01:12:23,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-15 01:12:23,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491357737] [2020-09-15 01:12:23,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-15 01:12:23,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:23,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-15 01:12:23,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-15 01:12:23,178 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 6 states. [2020-09-15 01:12:23,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:23,296 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-09-15 01:12:23,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-15 01:12:23,299 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-15 01:12:23,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:23,300 INFO L225 Difference]: With dead ends: 54 [2020-09-15 01:12:23,300 INFO L226 Difference]: Without dead ends: 43 [2020-09-15 01:12:23,300 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-09-15 01:12:23,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-15 01:12:23,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-09-15 01:12:23,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-15 01:12:23,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions. [2020-09-15 01:12:23,311 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10 [2020-09-15 01:12:23,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:23,312 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 80 transitions. [2020-09-15 01:12:23,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-15 01:12:23,312 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions. [2020-09-15 01:12:23,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-15 01:12:23,313 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:23,313 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:23,313 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-15 01:12:23,313 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:23,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:23,314 INFO L82 PathProgramCache]: Analyzing trace with hash 447691255, now seen corresponding path program 3 times [2020-09-15 01:12:23,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:23,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022402346] [2020-09-15 01:12:23,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:23,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:23,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:23,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022402346] [2020-09-15 01:12:23,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 01:12:23,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-15 01:12:23,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445523391] [2020-09-15 01:12:23,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-15 01:12:23,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:23,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-15 01:12:23,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-15 01:12:23,396 INFO L87 Difference]: Start difference. First operand 34 states and 80 transitions. Second operand 6 states. [2020-09-15 01:12:23,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:23,510 INFO L93 Difference]: Finished difference Result 57 states and 133 transitions. [2020-09-15 01:12:23,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-15 01:12:23,510 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-15 01:12:23,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:23,512 INFO L225 Difference]: With dead ends: 57 [2020-09-15 01:12:23,512 INFO L226 Difference]: Without dead ends: 51 [2020-09-15 01:12:23,513 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-09-15 01:12:23,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-09-15 01:12:23,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-09-15 01:12:23,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-15 01:12:23,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-09-15 01:12:23,519 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2020-09-15 01:12:23,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:23,520 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-09-15 01:12:23,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-15 01:12:23,520 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-09-15 01:12:23,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 01:12:23,521 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:23,521 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:23,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-15 01:12:23,522 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:23,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:23,522 INFO L82 PathProgramCache]: Analyzing trace with hash 211540140, now seen corresponding path program 4 times [2020-09-15 01:12:23,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:23,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478788587] [2020-09-15 01:12:23,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:23,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:23,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:23,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478788587] [2020-09-15 01:12:23,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733270104] [2020-09-15 01:12:23,605 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:23,674 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:12:23,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:12:23,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-15 01:12:23,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:12:23,741 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:12:23,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:23,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:23,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-15 01:12:23,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696063830] [2020-09-15 01:12:23,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-15 01:12:23,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:23,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-15 01:12:23,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-09-15 01:12:23,760 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2020-09-15 01:12:23,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:23,911 INFO L93 Difference]: Finished difference Result 48 states and 117 transitions. [2020-09-15 01:12:23,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-15 01:12:23,913 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-15 01:12:23,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:23,914 INFO L225 Difference]: With dead ends: 48 [2020-09-15 01:12:23,914 INFO L226 Difference]: Without dead ends: 43 [2020-09-15 01:12:23,914 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:12:23,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-15 01:12:23,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-09-15 01:12:23,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-15 01:12:23,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-09-15 01:12:23,920 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 11 [2020-09-15 01:12:23,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:23,920 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-09-15 01:12:23,920 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-15 01:12:23,921 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-09-15 01:12:23,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 01:12:23,921 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:23,922 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:24,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-09-15 01:12:24,123 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:24,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:24,124 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 5 times [2020-09-15 01:12:24,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:24,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998188724] [2020-09-15 01:12:24,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:24,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:24,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:24,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998188724] [2020-09-15 01:12:24,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050762028] [2020-09-15 01:12:24,254 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:24,312 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:12:24,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:12:24,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-15 01:12:24,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:12:24,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:24,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:24,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-09-15 01:12:24,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540857334] [2020-09-15 01:12:24,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-15 01:12:24,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:24,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-15 01:12:24,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-15 01:12:24,339 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 7 states. [2020-09-15 01:12:24,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:24,442 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-09-15 01:12:24,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-15 01:12:24,443 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-09-15 01:12:24,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:24,444 INFO L225 Difference]: With dead ends: 54 [2020-09-15 01:12:24,444 INFO L226 Difference]: Without dead ends: 48 [2020-09-15 01:12:24,445 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-09-15 01:12:24,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-15 01:12:24,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-09-15 01:12:24,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-15 01:12:24,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-09-15 01:12:24,452 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 11 [2020-09-15 01:12:24,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:24,452 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-09-15 01:12:24,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-15 01:12:24,452 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-09-15 01:12:24,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 01:12:24,453 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:24,453 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:24,661 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:24,662 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:24,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:24,663 INFO L82 PathProgramCache]: Analyzing trace with hash 993037435, now seen corresponding path program 6 times [2020-09-15 01:12:24,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:24,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325233608] [2020-09-15 01:12:24,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:24,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:24,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:24,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325233608] [2020-09-15 01:12:24,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254241659] [2020-09-15 01:12:24,748 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:24,805 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-15 01:12:24,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:12:24,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-15 01:12:24,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:12:24,834 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:12:24,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:24,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:24,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-15 01:12:24,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231005322] [2020-09-15 01:12:24,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-15 01:12:24,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:24,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-15 01:12:24,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-15 01:12:24,857 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 8 states. [2020-09-15 01:12:25,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:25,016 INFO L93 Difference]: Finished difference Result 58 states and 133 transitions. [2020-09-15 01:12:25,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-15 01:12:25,017 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-15 01:12:25,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:25,018 INFO L225 Difference]: With dead ends: 58 [2020-09-15 01:12:25,018 INFO L226 Difference]: Without dead ends: 52 [2020-09-15 01:12:25,019 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-09-15 01:12:25,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-15 01:12:25,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-09-15 01:12:25,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-15 01:12:25,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-09-15 01:12:25,025 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 11 [2020-09-15 01:12:25,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:25,025 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-09-15 01:12:25,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-15 01:12:25,025 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-09-15 01:12:25,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 01:12:25,026 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:25,026 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:25,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:25,240 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:25,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:25,241 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 7 times [2020-09-15 01:12:25,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:25,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383348917] [2020-09-15 01:12:25,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:25,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:25,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:25,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383348917] [2020-09-15 01:12:25,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883572016] [2020-09-15 01:12:25,326 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:25,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:25,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-15 01:12:25,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:12:25,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:25,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:25,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-09-15 01:12:25,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159906538] [2020-09-15 01:12:25,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-15 01:12:25,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:25,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-15 01:12:25,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-15 01:12:25,419 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 7 states. [2020-09-15 01:12:25,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:25,590 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-09-15 01:12:25,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-15 01:12:25,591 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-09-15 01:12:25,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:25,592 INFO L225 Difference]: With dead ends: 78 [2020-09-15 01:12:25,592 INFO L226 Difference]: Without dead ends: 72 [2020-09-15 01:12:25,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:12:25,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-15 01:12:25,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2020-09-15 01:12:25,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-15 01:12:25,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 117 transitions. [2020-09-15 01:12:25,601 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 117 transitions. Word has length 11 [2020-09-15 01:12:25,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:25,601 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 117 transitions. [2020-09-15 01:12:25,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-15 01:12:25,601 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 117 transitions. [2020-09-15 01:12:25,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 01:12:25,602 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:25,602 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:25,815 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:25,816 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:25,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:25,817 INFO L82 PathProgramCache]: Analyzing trace with hash 993544285, now seen corresponding path program 8 times [2020-09-15 01:12:25,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:25,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280289407] [2020-09-15 01:12:25,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:25,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:25,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:25,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280289407] [2020-09-15 01:12:25,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989564172] [2020-09-15 01:12:25,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:25,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:12:25,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:12:25,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-15 01:12:25,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:12:26,017 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:12:26,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:26,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:26,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-15 01:12:26,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070533195] [2020-09-15 01:12:26,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-15 01:12:26,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:26,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-15 01:12:26,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-15 01:12:26,038 INFO L87 Difference]: Start difference. First operand 46 states and 117 transitions. Second operand 8 states. [2020-09-15 01:12:26,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:26,256 INFO L93 Difference]: Finished difference Result 62 states and 145 transitions. [2020-09-15 01:12:26,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-15 01:12:26,257 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-15 01:12:26,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:26,257 INFO L225 Difference]: With dead ends: 62 [2020-09-15 01:12:26,258 INFO L226 Difference]: Without dead ends: 54 [2020-09-15 01:12:26,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:12:26,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-15 01:12:26,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2020-09-15 01:12:26,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-15 01:12:26,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-09-15 01:12:26,264 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-09-15 01:12:26,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:26,264 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-09-15 01:12:26,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-15 01:12:26,264 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-09-15 01:12:26,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:12:26,265 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:26,265 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:26,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-09-15 01:12:26,466 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:26,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:26,467 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 9 times [2020-09-15 01:12:26,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:26,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900755825] [2020-09-15 01:12:26,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:26,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:26,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:26,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900755825] [2020-09-15 01:12:26,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120958680] [2020-09-15 01:12:26,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:26,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-15 01:12:26,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:12:26,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 01:12:26,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:12:26,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:26,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:26,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-09-15 01:12:26,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750829596] [2020-09-15 01:12:26,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-15 01:12:26,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:26,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-15 01:12:26,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-15 01:12:26,683 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-09-15 01:12:26,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:26,824 INFO L93 Difference]: Finished difference Result 64 states and 147 transitions. [2020-09-15 01:12:26,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-15 01:12:26,825 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-09-15 01:12:26,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:26,826 INFO L225 Difference]: With dead ends: 64 [2020-09-15 01:12:26,826 INFO L226 Difference]: Without dead ends: 58 [2020-09-15 01:12:26,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:12:26,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-15 01:12:26,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-09-15 01:12:26,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-15 01:12:26,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 109 transitions. [2020-09-15 01:12:26,832 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 109 transitions. Word has length 12 [2020-09-15 01:12:26,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:26,833 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 109 transitions. [2020-09-15 01:12:26,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-15 01:12:26,833 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 109 transitions. [2020-09-15 01:12:26,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:12:26,834 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:26,834 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:27,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:27,045 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:27,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:27,046 INFO L82 PathProgramCache]: Analyzing trace with hash -2032679834, now seen corresponding path program 10 times [2020-09-15 01:12:27,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:27,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790128935] [2020-09-15 01:12:27,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:27,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:27,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:27,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790128935] [2020-09-15 01:12:27,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846569892] [2020-09-15 01:12:27,166 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:27,227 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:12:27,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:12:27,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 01:12:27,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:12:27,256 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:12:27,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:27,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:27,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-15 01:12:27,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102559002] [2020-09-15 01:12:27,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-15 01:12:27,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:27,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-15 01:12:27,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-15 01:12:27,272 INFO L87 Difference]: Start difference. First operand 45 states and 109 transitions. Second operand 9 states. [2020-09-15 01:12:27,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:27,477 INFO L93 Difference]: Finished difference Result 61 states and 141 transitions. [2020-09-15 01:12:27,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-15 01:12:27,478 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-15 01:12:27,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:27,479 INFO L225 Difference]: With dead ends: 61 [2020-09-15 01:12:27,479 INFO L226 Difference]: Without dead ends: 55 [2020-09-15 01:12:27,480 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-09-15 01:12:27,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-15 01:12:27,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-09-15 01:12:27,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-15 01:12:27,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-09-15 01:12:27,486 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 12 [2020-09-15 01:12:27,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:27,486 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-09-15 01:12:27,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-15 01:12:27,486 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-09-15 01:12:27,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:12:27,487 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:27,488 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:27,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:27,703 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:27,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:27,704 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 11 times [2020-09-15 01:12:27,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:27,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315872952] [2020-09-15 01:12:27,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:27,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:27,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:27,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315872952] [2020-09-15 01:12:27,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035201770] [2020-09-15 01:12:27,812 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:27,912 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:12:27,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:12:27,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 01:12:27,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:12:27,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:27,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:27,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-09-15 01:12:27,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758722021] [2020-09-15 01:12:27,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-15 01:12:27,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:27,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-15 01:12:27,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-15 01:12:27,977 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 8 states. [2020-09-15 01:12:28,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:28,155 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-09-15 01:12:28,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-15 01:12:28,156 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-09-15 01:12:28,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:28,157 INFO L225 Difference]: With dead ends: 77 [2020-09-15 01:12:28,157 INFO L226 Difference]: Without dead ends: 71 [2020-09-15 01:12:28,158 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:12:28,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-15 01:12:28,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2020-09-15 01:12:28,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-15 01:12:28,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 121 transitions. [2020-09-15 01:12:28,171 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 121 transitions. Word has length 12 [2020-09-15 01:12:28,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:28,172 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 121 transitions. [2020-09-15 01:12:28,172 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-15 01:12:28,172 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 121 transitions. [2020-09-15 01:12:28,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:12:28,176 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:28,176 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:28,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-09-15 01:12:28,390 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:28,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:28,391 INFO L82 PathProgramCache]: Analyzing trace with hash -2032172984, now seen corresponding path program 12 times [2020-09-15 01:12:28,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:28,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470240855] [2020-09-15 01:12:28,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:28,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:28,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:28,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470240855] [2020-09-15 01:12:28,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687513169] [2020-09-15 01:12:28,473 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:28,535 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-15 01:12:28,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:12:28,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:12:28,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:12:28,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:28,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:28,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-15 01:12:28,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633806649] [2020-09-15 01:12:28,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-15 01:12:28,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:28,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-15 01:12:28,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-15 01:12:28,599 INFO L87 Difference]: Start difference. First operand 48 states and 121 transitions. Second operand 9 states. [2020-09-15 01:12:28,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:28,867 INFO L93 Difference]: Finished difference Result 56 states and 133 transitions. [2020-09-15 01:12:28,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-15 01:12:28,868 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-15 01:12:28,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:28,869 INFO L225 Difference]: With dead ends: 56 [2020-09-15 01:12:28,869 INFO L226 Difference]: Without dead ends: 48 [2020-09-15 01:12:28,870 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-09-15 01:12:28,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-15 01:12:28,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 37. [2020-09-15 01:12:28,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-15 01:12:28,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 88 transitions. [2020-09-15 01:12:28,878 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 88 transitions. Word has length 12 [2020-09-15 01:12:28,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:28,879 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 88 transitions. [2020-09-15 01:12:28,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-15 01:12:28,879 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 88 transitions. [2020-09-15 01:12:28,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:12:28,882 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:28,882 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:29,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:29,097 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:29,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:29,098 INFO L82 PathProgramCache]: Analyzing trace with hash 735118070, now seen corresponding path program 13 times [2020-09-15 01:12:29,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:29,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916628511] [2020-09-15 01:12:29,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:29,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:29,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:29,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916628511] [2020-09-15 01:12:29,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118516066] [2020-09-15 01:12:29,247 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:29,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:29,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 01:12:29,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:12:29,363 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:12:29,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:29,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:29,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-15 01:12:29,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961644146] [2020-09-15 01:12:29,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-15 01:12:29,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:29,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-15 01:12:29,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-15 01:12:29,379 INFO L87 Difference]: Start difference. First operand 37 states and 88 transitions. Second operand 9 states. [2020-09-15 01:12:29,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:29,580 INFO L93 Difference]: Finished difference Result 60 states and 143 transitions. [2020-09-15 01:12:29,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-15 01:12:29,581 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-15 01:12:29,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:29,582 INFO L225 Difference]: With dead ends: 60 [2020-09-15 01:12:29,582 INFO L226 Difference]: Without dead ends: 55 [2020-09-15 01:12:29,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:12:29,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-15 01:12:29,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-09-15 01:12:29,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-15 01:12:29,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-09-15 01:12:29,594 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 12 [2020-09-15 01:12:29,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:29,594 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-09-15 01:12:29,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-15 01:12:29,595 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-09-15 01:12:29,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:12:29,595 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:29,595 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:29,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-09-15 01:12:29,807 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:29,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:29,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1427163243, now seen corresponding path program 14 times [2020-09-15 01:12:29,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:29,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842662325] [2020-09-15 01:12:29,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:29,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:29,890 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:29,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842662325] [2020-09-15 01:12:29,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826257713] [2020-09-15 01:12:29,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:29,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:12:29,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:12:29,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:12:29,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:12:30,005 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:12:30,022 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:30,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:30,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-15 01:12:30,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154290422] [2020-09-15 01:12:30,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-15 01:12:30,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:30,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-15 01:12:30,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-09-15 01:12:30,026 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 10 states. [2020-09-15 01:12:30,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:30,282 INFO L93 Difference]: Finished difference Result 54 states and 133 transitions. [2020-09-15 01:12:30,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-15 01:12:30,282 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-15 01:12:30,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:30,283 INFO L225 Difference]: With dead ends: 54 [2020-09-15 01:12:30,283 INFO L226 Difference]: Without dead ends: 49 [2020-09-15 01:12:30,284 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:12:30,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-15 01:12:30,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-09-15 01:12:30,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-15 01:12:30,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-09-15 01:12:30,287 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 13 [2020-09-15 01:12:30,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:30,288 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-09-15 01:12:30,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-15 01:12:30,288 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-09-15 01:12:30,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:12:30,288 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:30,289 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:30,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-09-15 01:12:30,499 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:30,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:30,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 15 times [2020-09-15 01:12:30,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:30,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881443557] [2020-09-15 01:12:30,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:30,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:30,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:30,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881443557] [2020-09-15 01:12:30,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064040699] [2020-09-15 01:12:30,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:30,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:12:30,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:12:30,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:12:30,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:12:30,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:30,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:30,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-15 01:12:30,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21725698] [2020-09-15 01:12:30,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-15 01:12:30,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:30,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-15 01:12:30,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-09-15 01:12:30,673 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 9 states. [2020-09-15 01:12:30,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:30,811 INFO L93 Difference]: Finished difference Result 60 states and 139 transitions. [2020-09-15 01:12:30,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-15 01:12:30,812 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-15 01:12:30,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:30,813 INFO L225 Difference]: With dead ends: 60 [2020-09-15 01:12:30,813 INFO L226 Difference]: Without dead ends: 54 [2020-09-15 01:12:30,814 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-09-15 01:12:30,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-15 01:12:30,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-09-15 01:12:30,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-15 01:12:30,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-09-15 01:12:30,818 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 13 [2020-09-15 01:12:30,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:30,818 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-09-15 01:12:30,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-15 01:12:30,818 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-09-15 01:12:30,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:12:30,819 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:30,819 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:31,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-09-15 01:12:31,030 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:31,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:31,030 INFO L82 PathProgramCache]: Analyzing trace with hash 826251258, now seen corresponding path program 16 times [2020-09-15 01:12:31,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:31,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106858136] [2020-09-15 01:12:31,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:31,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:31,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:31,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106858136] [2020-09-15 01:12:31,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130341031] [2020-09-15 01:12:31,147 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:31,209 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:12:31,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:12:31,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:12:31,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:12:31,234 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:12:31,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:31,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:31,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-15 01:12:31,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456621172] [2020-09-15 01:12:31,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-15 01:12:31,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:31,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-15 01:12:31,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-15 01:12:31,260 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 10 states. [2020-09-15 01:12:31,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:31,418 INFO L93 Difference]: Finished difference Result 66 states and 151 transitions. [2020-09-15 01:12:31,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-15 01:12:31,419 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-15 01:12:31,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:31,420 INFO L225 Difference]: With dead ends: 66 [2020-09-15 01:12:31,421 INFO L226 Difference]: Without dead ends: 60 [2020-09-15 01:12:31,421 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-09-15 01:12:31,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-15 01:12:31,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-09-15 01:12:31,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-15 01:12:31,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-09-15 01:12:31,425 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 13 [2020-09-15 01:12:31,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:31,425 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-09-15 01:12:31,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-15 01:12:31,425 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-09-15 01:12:31,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:12:31,426 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:31,426 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:31,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-09-15 01:12:31,635 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:31,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:31,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 17 times [2020-09-15 01:12:31,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:31,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261081675] [2020-09-15 01:12:31,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:31,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:31,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:31,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261081675] [2020-09-15 01:12:31,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537313424] [2020-09-15 01:12:31,729 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:31,777 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-15 01:12:31,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:12:31,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:12:31,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:12:31,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:31,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:31,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-15 01:12:31,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978759857] [2020-09-15 01:12:31,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-15 01:12:31,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:31,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-15 01:12:31,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-15 01:12:31,808 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 9 states. [2020-09-15 01:12:32,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:32,055 INFO L93 Difference]: Finished difference Result 67 states and 155 transitions. [2020-09-15 01:12:32,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-15 01:12:32,056 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-15 01:12:32,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:32,057 INFO L225 Difference]: With dead ends: 67 [2020-09-15 01:12:32,057 INFO L226 Difference]: Without dead ends: 61 [2020-09-15 01:12:32,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:12:32,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-15 01:12:32,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2020-09-15 01:12:32,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-15 01:12:32,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-09-15 01:12:32,060 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 13 [2020-09-15 01:12:32,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:32,062 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-09-15 01:12:32,062 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-15 01:12:32,062 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-09-15 01:12:32,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:12:32,062 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:32,063 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:32,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:32,264 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:32,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:32,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1313334108, now seen corresponding path program 18 times [2020-09-15 01:12:32,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:32,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17424119] [2020-09-15 01:12:32,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:32,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:32,352 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:32,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17424119] [2020-09-15 01:12:32,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736555837] [2020-09-15 01:12:32,353 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:32,407 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-15 01:12:32,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:12:32,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:12:32,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:12:32,432 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:12:32,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:32,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:32,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-15 01:12:32,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861714182] [2020-09-15 01:12:32,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-15 01:12:32,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:32,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-15 01:12:32,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-15 01:12:32,447 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-09-15 01:12:32,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:32,683 INFO L93 Difference]: Finished difference Result 69 states and 159 transitions. [2020-09-15 01:12:32,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 01:12:32,684 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-15 01:12:32,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:32,685 INFO L225 Difference]: With dead ends: 69 [2020-09-15 01:12:32,686 INFO L226 Difference]: Without dead ends: 63 [2020-09-15 01:12:32,686 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:12:32,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-15 01:12:32,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-09-15 01:12:32,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-15 01:12:32,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-09-15 01:12:32,690 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 13 [2020-09-15 01:12:32,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:32,690 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-09-15 01:12:32,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-15 01:12:32,690 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-09-15 01:12:32,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:12:32,691 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:32,691 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:32,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:32,892 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:32,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:32,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 19 times [2020-09-15 01:12:32,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:32,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941570765] [2020-09-15 01:12:32,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:32,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:32,985 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:32,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941570765] [2020-09-15 01:12:32,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038870696] [2020-09-15 01:12:32,986 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:33,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:33,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:12:33,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:12:33,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:33,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:33,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-15 01:12:33,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428073722] [2020-09-15 01:12:33,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-15 01:12:33,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:33,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-15 01:12:33,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-15 01:12:33,064 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 9 states. [2020-09-15 01:12:33,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:33,336 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-09-15 01:12:33,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-15 01:12:33,337 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-15 01:12:33,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:33,338 INFO L225 Difference]: With dead ends: 88 [2020-09-15 01:12:33,338 INFO L226 Difference]: Without dead ends: 82 [2020-09-15 01:12:33,339 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:12:33,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-15 01:12:33,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2020-09-15 01:12:33,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-15 01:12:33,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 133 transitions. [2020-09-15 01:12:33,342 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 133 transitions. Word has length 13 [2020-09-15 01:12:33,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:33,342 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 133 transitions. [2020-09-15 01:12:33,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-15 01:12:33,343 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 133 transitions. [2020-09-15 01:12:33,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:12:33,343 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:33,343 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:33,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:33,544 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:33,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:33,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1313840958, now seen corresponding path program 20 times [2020-09-15 01:12:33,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:33,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48017994] [2020-09-15 01:12:33,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:33,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:33,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:33,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48017994] [2020-09-15 01:12:33,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702009520] [2020-09-15 01:12:33,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:33,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:12:33,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:12:33,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:12:33,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:12:33,707 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:12:33,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:33,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:33,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-15 01:12:33,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855594360] [2020-09-15 01:12:33,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-15 01:12:33,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:33,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-15 01:12:33,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-15 01:12:33,724 INFO L87 Difference]: Start difference. First operand 52 states and 133 transitions. Second operand 10 states. [2020-09-15 01:12:34,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:34,070 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-09-15 01:12:34,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 01:12:34,071 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-15 01:12:34,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:34,072 INFO L225 Difference]: With dead ends: 69 [2020-09-15 01:12:34,072 INFO L226 Difference]: Without dead ends: 61 [2020-09-15 01:12:34,073 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:12:34,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-15 01:12:34,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-09-15 01:12:34,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-15 01:12:34,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-09-15 01:12:34,076 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-09-15 01:12:34,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:34,076 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-09-15 01:12:34,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-15 01:12:34,076 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-09-15 01:12:34,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:12:34,077 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:34,077 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:34,278 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-09-15 01:12:34,278 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:34,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:34,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 21 times [2020-09-15 01:12:34,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:34,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631900411] [2020-09-15 01:12:34,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:34,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:34,409 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:34,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631900411] [2020-09-15 01:12:34,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065961379] [2020-09-15 01:12:34,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:34,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:12:34,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:12:34,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:12:34,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:12:34,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:34,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:34,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-15 01:12:34,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211657432] [2020-09-15 01:12:34,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-15 01:12:34,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:34,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-15 01:12:34,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-15 01:12:34,491 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-09-15 01:12:34,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:34,677 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-09-15 01:12:34,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-15 01:12:34,677 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-09-15 01:12:34,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:34,678 INFO L225 Difference]: With dead ends: 74 [2020-09-15 01:12:34,679 INFO L226 Difference]: Without dead ends: 68 [2020-09-15 01:12:34,679 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:12:34,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-15 01:12:34,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2020-09-15 01:12:34,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-15 01:12:34,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-09-15 01:12:34,682 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-09-15 01:12:34,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:34,683 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-09-15 01:12:34,683 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-15 01:12:34,683 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-09-15 01:12:34,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:12:34,683 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:34,684 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:34,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-09-15 01:12:34,891 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:34,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:34,891 INFO L82 PathProgramCache]: Analyzing trace with hash 804815141, now seen corresponding path program 22 times [2020-09-15 01:12:34,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:34,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211138939] [2020-09-15 01:12:34,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:34,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:35,000 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:35,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211138939] [2020-09-15 01:12:35,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327249068] [2020-09-15 01:12:35,001 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:35,064 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:12:35,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:12:35,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:12:35,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:12:35,091 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:12:35,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:35,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:35,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-15 01:12:35,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100629641] [2020-09-15 01:12:35,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:12:35,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:35,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:12:35,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:12:35,109 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-09-15 01:12:35,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:35,371 INFO L93 Difference]: Finished difference Result 71 states and 165 transitions. [2020-09-15 01:12:35,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 01:12:35,376 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-15 01:12:35,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:35,377 INFO L225 Difference]: With dead ends: 71 [2020-09-15 01:12:35,377 INFO L226 Difference]: Without dead ends: 65 [2020-09-15 01:12:35,377 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:12:35,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-09-15 01:12:35,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2020-09-15 01:12:35,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-15 01:12:35,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-09-15 01:12:35,380 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-09-15 01:12:35,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:35,380 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-09-15 01:12:35,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:12:35,381 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-09-15 01:12:35,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:12:35,381 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:35,381 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:35,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-09-15 01:12:35,590 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:35,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:35,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 23 times [2020-09-15 01:12:35,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:35,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011424262] [2020-09-15 01:12:35,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:35,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:35,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:35,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011424262] [2020-09-15 01:12:35,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689932787] [2020-09-15 01:12:35,703 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:35,759 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-15 01:12:35,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:12:35,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:12:35,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:12:35,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:35,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:35,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-15 01:12:35,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578920734] [2020-09-15 01:12:35,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-15 01:12:35,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:35,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-15 01:12:35,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-15 01:12:35,797 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-09-15 01:12:36,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:36,034 INFO L93 Difference]: Finished difference Result 68 states and 159 transitions. [2020-09-15 01:12:36,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-15 01:12:36,035 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-09-15 01:12:36,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:36,036 INFO L225 Difference]: With dead ends: 68 [2020-09-15 01:12:36,036 INFO L226 Difference]: Without dead ends: 62 [2020-09-15 01:12:36,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:12:36,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-15 01:12:36,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-09-15 01:12:36,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-15 01:12:36,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-09-15 01:12:36,041 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-09-15 01:12:36,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:36,042 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-09-15 01:12:36,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-15 01:12:36,042 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-09-15 01:12:36,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:12:36,042 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:36,043 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:36,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-09-15 01:12:36,249 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:36,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:36,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1291897991, now seen corresponding path program 24 times [2020-09-15 01:12:36,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:36,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852623885] [2020-09-15 01:12:36,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:36,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:36,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:36,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852623885] [2020-09-15 01:12:36,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8685090] [2020-09-15 01:12:36,371 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:36,430 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-15 01:12:36,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:12:36,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:12:36,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:12:36,458 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:12:36,473 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:36,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:36,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-15 01:12:36,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346064345] [2020-09-15 01:12:36,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:12:36,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:36,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:12:36,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:12:36,475 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-09-15 01:12:36,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:36,829 INFO L93 Difference]: Finished difference Result 67 states and 157 transitions. [2020-09-15 01:12:36,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 01:12:36,830 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-15 01:12:36,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:36,831 INFO L225 Difference]: With dead ends: 67 [2020-09-15 01:12:36,831 INFO L226 Difference]: Without dead ends: 61 [2020-09-15 01:12:36,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:12:36,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-15 01:12:36,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-09-15 01:12:36,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-15 01:12:36,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-09-15 01:12:36,834 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-09-15 01:12:36,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:36,834 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-09-15 01:12:36,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:12:36,834 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-09-15 01:12:36,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:12:36,835 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:36,835 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:37,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-09-15 01:12:37,036 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:37,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:37,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 25 times [2020-09-15 01:12:37,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:37,037 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745656861] [2020-09-15 01:12:37,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:37,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:37,126 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:37,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745656861] [2020-09-15 01:12:37,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772277148] [2020-09-15 01:12:37,127 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:37,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:37,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:12:37,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:12:37,214 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:37,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:37,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-15 01:12:37,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335619401] [2020-09-15 01:12:37,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-15 01:12:37,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:37,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-15 01:12:37,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-15 01:12:37,216 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-09-15 01:12:37,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:37,512 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-09-15 01:12:37,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-15 01:12:37,513 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-09-15 01:12:37,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:37,514 INFO L225 Difference]: With dead ends: 83 [2020-09-15 01:12:37,514 INFO L226 Difference]: Without dead ends: 77 [2020-09-15 01:12:37,515 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:12:37,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-15 01:12:37,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2020-09-15 01:12:37,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-15 01:12:37,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 137 transitions. [2020-09-15 01:12:37,518 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 137 transitions. Word has length 14 [2020-09-15 01:12:37,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:37,519 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 137 transitions. [2020-09-15 01:12:37,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-15 01:12:37,519 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 137 transitions. [2020-09-15 01:12:37,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:12:37,519 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:37,520 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:37,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:37,730 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:37,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:37,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1292404841, now seen corresponding path program 26 times [2020-09-15 01:12:37,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:37,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352398913] [2020-09-15 01:12:37,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:37,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:37,826 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:37,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352398913] [2020-09-15 01:12:37,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249025446] [2020-09-15 01:12:37,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:37,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:12:37,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:12:37,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:12:37,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:12:37,933 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:37,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:37,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-15 01:12:37,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900794725] [2020-09-15 01:12:37,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:12:37,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:37,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:12:37,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:12:37,935 INFO L87 Difference]: Start difference. First operand 54 states and 137 transitions. Second operand 11 states. [2020-09-15 01:12:38,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:38,275 INFO L93 Difference]: Finished difference Result 62 states and 149 transitions. [2020-09-15 01:12:38,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 01:12:38,275 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-15 01:12:38,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:38,276 INFO L225 Difference]: With dead ends: 62 [2020-09-15 01:12:38,276 INFO L226 Difference]: Without dead ends: 54 [2020-09-15 01:12:38,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:12:38,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-15 01:12:38,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2020-09-15 01:12:38,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-15 01:12:38,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 98 transitions. [2020-09-15 01:12:38,280 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 98 transitions. Word has length 14 [2020-09-15 01:12:38,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:38,280 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 98 transitions. [2020-09-15 01:12:38,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:12:38,281 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 98 transitions. [2020-09-15 01:12:38,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:12:38,281 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:38,281 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:38,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-09-15 01:12:38,485 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:38,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:38,485 INFO L82 PathProgramCache]: Analyzing trace with hash 2074380341, now seen corresponding path program 27 times [2020-09-15 01:12:38,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:38,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643708541] [2020-09-15 01:12:38,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:38,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:38,603 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:38,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643708541] [2020-09-15 01:12:38,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256396212] [2020-09-15 01:12:38,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:38,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:12:38,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:12:38,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:12:38,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:12:38,696 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:12:38,714 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:38,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:38,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-15 01:12:38,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633335943] [2020-09-15 01:12:38,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:12:38,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:38,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:12:38,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:12:38,716 INFO L87 Difference]: Start difference. First operand 41 states and 98 transitions. Second operand 11 states. [2020-09-15 01:12:39,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:39,084 INFO L93 Difference]: Finished difference Result 68 states and 163 transitions. [2020-09-15 01:12:39,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-15 01:12:39,084 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-15 01:12:39,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:39,085 INFO L225 Difference]: With dead ends: 68 [2020-09-15 01:12:39,085 INFO L226 Difference]: Without dead ends: 63 [2020-09-15 01:12:39,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:12:39,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-15 01:12:39,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2020-09-15 01:12:39,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-15 01:12:39,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-09-15 01:12:39,089 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 14 [2020-09-15 01:12:39,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:39,089 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-09-15 01:12:39,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:12:39,090 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-09-15 01:12:39,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 01:12:39,090 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:39,090 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:39,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-09-15 01:12:39,301 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:39,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:39,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1409860714, now seen corresponding path program 28 times [2020-09-15 01:12:39,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:39,302 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071587466] [2020-09-15 01:12:39,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:39,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:39,402 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:39,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071587466] [2020-09-15 01:12:39,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573652719] [2020-09-15 01:12:39,403 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:39,457 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:12:39,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:12:39,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:12:39,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:12:39,485 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:12:39,500 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:39,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:39,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-15 01:12:39,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483341239] [2020-09-15 01:12:39,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 01:12:39,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:39,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 01:12:39,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-15 01:12:39,504 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 12 states. [2020-09-15 01:12:39,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:39,898 INFO L93 Difference]: Finished difference Result 60 states and 149 transitions. [2020-09-15 01:12:39,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-15 01:12:39,898 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-15 01:12:39,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:39,899 INFO L225 Difference]: With dead ends: 60 [2020-09-15 01:12:39,899 INFO L226 Difference]: Without dead ends: 55 [2020-09-15 01:12:39,900 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:12:39,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-15 01:12:39,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-09-15 01:12:39,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-15 01:12:39,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-09-15 01:12:39,903 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 15 [2020-09-15 01:12:39,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:39,904 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-09-15 01:12:39,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 01:12:39,904 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-09-15 01:12:39,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 01:12:39,904 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:39,905 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:40,110 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:40,111 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:40,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:40,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 29 times [2020-09-15 01:12:40,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:40,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32952169] [2020-09-15 01:12:40,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:40,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:40,227 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:40,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32952169] [2020-09-15 01:12:40,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69419142] [2020-09-15 01:12:40,228 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:40,297 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-15 01:12:40,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:12:40,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:12:40,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:12:40,325 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:40,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:40,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-15 01:12:40,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475723441] [2020-09-15 01:12:40,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:12:40,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:40,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:12:40,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:12:40,328 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 11 states. [2020-09-15 01:12:40,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:40,526 INFO L93 Difference]: Finished difference Result 66 states and 153 transitions. [2020-09-15 01:12:40,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-15 01:12:40,527 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-15 01:12:40,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:40,528 INFO L225 Difference]: With dead ends: 66 [2020-09-15 01:12:40,528 INFO L226 Difference]: Without dead ends: 60 [2020-09-15 01:12:40,529 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:12:40,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-15 01:12:40,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-09-15 01:12:40,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-15 01:12:40,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-09-15 01:12:40,533 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 15 [2020-09-15 01:12:40,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:40,534 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-09-15 01:12:40,534 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:12:40,534 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-09-15 01:12:40,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 01:12:40,537 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:40,537 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:40,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:40,738 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:40,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:40,738 INFO L82 PathProgramCache]: Analyzing trace with hash -541474887, now seen corresponding path program 30 times [2020-09-15 01:12:40,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:40,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570914926] [2020-09-15 01:12:40,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:40,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:40,913 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:40,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570914926] [2020-09-15 01:12:40,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112812325] [2020-09-15 01:12:40,914 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:41,027 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-15 01:12:41,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:12:41,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:12:41,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:12:41,049 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:12:41,076 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:41,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:41,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-15 01:12:41,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818053417] [2020-09-15 01:12:41,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 01:12:41,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:41,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 01:12:41,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-09-15 01:12:41,079 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 12 states. [2020-09-15 01:12:41,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:41,297 INFO L93 Difference]: Finished difference Result 74 states and 169 transitions. [2020-09-15 01:12:41,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 01:12:41,298 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-15 01:12:41,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:41,299 INFO L225 Difference]: With dead ends: 74 [2020-09-15 01:12:41,299 INFO L226 Difference]: Without dead ends: 68 [2020-09-15 01:12:41,300 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:12:41,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-15 01:12:41,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-09-15 01:12:41,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-15 01:12:41,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-09-15 01:12:41,303 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 15 [2020-09-15 01:12:41,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:41,304 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-09-15 01:12:41,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 01:12:41,304 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-09-15 01:12:41,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 01:12:41,304 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:41,305 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:41,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-09-15 01:12:41,515 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:41,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:41,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 31 times [2020-09-15 01:12:41,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:41,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65668069] [2020-09-15 01:12:41,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:41,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:41,640 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:41,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65668069] [2020-09-15 01:12:41,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069794113] [2020-09-15 01:12:41,641 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:41,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:41,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:12:41,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:12:41,720 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:41,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:41,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-15 01:12:41,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099385135] [2020-09-15 01:12:41,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:12:41,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:41,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:12:41,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:12:41,723 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 11 states. [2020-09-15 01:12:42,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:42,024 INFO L93 Difference]: Finished difference Result 75 states and 173 transitions. [2020-09-15 01:12:42,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-15 01:12:42,024 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-15 01:12:42,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:42,025 INFO L225 Difference]: With dead ends: 75 [2020-09-15 01:12:42,025 INFO L226 Difference]: Without dead ends: 69 [2020-09-15 01:12:42,026 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:12:42,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-15 01:12:42,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2020-09-15 01:12:42,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-15 01:12:42,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-09-15 01:12:42,029 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 15 [2020-09-15 01:12:42,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:42,029 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-09-15 01:12:42,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:12:42,030 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-09-15 01:12:42,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 01:12:42,030 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:42,030 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:42,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:42,231 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:42,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:42,232 INFO L82 PathProgramCache]: Analyzing trace with hash -606291301, now seen corresponding path program 32 times [2020-09-15 01:12:42,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:42,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043775011] [2020-09-15 01:12:42,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:42,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:42,349 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:42,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043775011] [2020-09-15 01:12:42,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938362495] [2020-09-15 01:12:42,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:42,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:12:42,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:12:42,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:12:42,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:12:42,440 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:12:42,456 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:42,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:42,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-15 01:12:42,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136115531] [2020-09-15 01:12:42,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 01:12:42,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:42,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 01:12:42,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-15 01:12:42,459 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 12 states. [2020-09-15 01:12:42,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:42,800 INFO L93 Difference]: Finished difference Result 79 states and 181 transitions. [2020-09-15 01:12:42,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 01:12:42,800 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-15 01:12:42,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:42,801 INFO L225 Difference]: With dead ends: 79 [2020-09-15 01:12:42,802 INFO L226 Difference]: Without dead ends: 73 [2020-09-15 01:12:42,802 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:12:42,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-15 01:12:42,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 50. [2020-09-15 01:12:42,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-15 01:12:42,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-09-15 01:12:42,805 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 15 [2020-09-15 01:12:42,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:42,805 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-09-15 01:12:42,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 01:12:42,806 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-09-15 01:12:42,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 01:12:42,806 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:42,806 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:43,007 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-09-15 01:12:43,007 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:43,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:43,008 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 33 times [2020-09-15 01:12:43,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:43,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954358130] [2020-09-15 01:12:43,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:43,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:43,176 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:43,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954358130] [2020-09-15 01:12:43,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426649196] [2020-09-15 01:12:43,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:43,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-15 01:12:43,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:12:43,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:12:43,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:12:43,309 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:43,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:43,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-15 01:12:43,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405420377] [2020-09-15 01:12:43,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:12:43,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:43,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:12:43,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:12:43,315 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 11 states. [2020-09-15 01:12:43,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:43,704 INFO L93 Difference]: Finished difference Result 79 states and 183 transitions. [2020-09-15 01:12:43,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-15 01:12:43,705 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-15 01:12:43,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:43,706 INFO L225 Difference]: With dead ends: 79 [2020-09-15 01:12:43,706 INFO L226 Difference]: Without dead ends: 73 [2020-09-15 01:12:43,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:12:43,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-15 01:12:43,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2020-09-15 01:12:43,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-15 01:12:43,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-09-15 01:12:43,712 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 15 [2020-09-15 01:12:43,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:43,712 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-09-15 01:12:43,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:12:43,713 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-09-15 01:12:43,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 01:12:43,713 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:43,714 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:43,927 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:43,927 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:43,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:43,928 INFO L82 PathProgramCache]: Analyzing trace with hash -119208451, now seen corresponding path program 34 times [2020-09-15 01:12:43,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:43,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935724695] [2020-09-15 01:12:43,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:43,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:44,034 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:44,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935724695] [2020-09-15 01:12:44,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774457842] [2020-09-15 01:12:44,035 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:44,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:12:44,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:12:44,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:12:44,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:12:44,110 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:12:44,123 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:44,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:44,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-15 01:12:44,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702796421] [2020-09-15 01:12:44,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 01:12:44,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:44,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 01:12:44,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-15 01:12:44,126 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-09-15 01:12:44,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:44,543 INFO L93 Difference]: Finished difference Result 76 states and 177 transitions. [2020-09-15 01:12:44,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 01:12:44,544 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-15 01:12:44,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:44,545 INFO L225 Difference]: With dead ends: 76 [2020-09-15 01:12:44,545 INFO L226 Difference]: Without dead ends: 70 [2020-09-15 01:12:44,546 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:12:44,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-15 01:12:44,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2020-09-15 01:12:44,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-15 01:12:44,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-09-15 01:12:44,551 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 15 [2020-09-15 01:12:44,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:44,551 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-09-15 01:12:44,551 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 01:12:44,552 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-09-15 01:12:44,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 01:12:44,552 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:44,552 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:44,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-09-15 01:12:44,764 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:44,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:44,765 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 35 times [2020-09-15 01:12:44,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:44,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111884555] [2020-09-15 01:12:44,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:44,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:44,910 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:44,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111884555] [2020-09-15 01:12:44,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468398048] [2020-09-15 01:12:44,911 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:44,985 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-15 01:12:44,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:12:44,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:12:44,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:12:45,023 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:45,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:45,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-15 01:12:45,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156207284] [2020-09-15 01:12:45,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:12:45,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:45,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:12:45,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:12:45,027 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 11 states. [2020-09-15 01:12:45,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:45,485 INFO L93 Difference]: Finished difference Result 96 states and 227 transitions. [2020-09-15 01:12:45,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-15 01:12:45,486 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-15 01:12:45,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:45,487 INFO L225 Difference]: With dead ends: 96 [2020-09-15 01:12:45,488 INFO L226 Difference]: Without dead ends: 90 [2020-09-15 01:12:45,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:12:45,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-15 01:12:45,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2020-09-15 01:12:45,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-15 01:12:45,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 149 transitions. [2020-09-15 01:12:45,494 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 149 transitions. Word has length 15 [2020-09-15 01:12:45,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:45,494 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 149 transitions. [2020-09-15 01:12:45,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:12:45,495 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 149 transitions. [2020-09-15 01:12:45,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 01:12:45,495 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:45,496 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:45,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-09-15 01:12:45,696 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:45,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:45,697 INFO L82 PathProgramCache]: Analyzing trace with hash -118701601, now seen corresponding path program 36 times [2020-09-15 01:12:45,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:45,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647946059] [2020-09-15 01:12:45,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:45,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:45,797 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:45,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647946059] [2020-09-15 01:12:45,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835124240] [2020-09-15 01:12:45,798 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:45,856 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-15 01:12:45,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:12:45,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:12:45,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:12:45,884 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:12:45,895 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:45,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:45,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-15 01:12:45,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485681250] [2020-09-15 01:12:45,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 01:12:45,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:45,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 01:12:45,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-09-15 01:12:45,897 INFO L87 Difference]: Start difference. First operand 58 states and 149 transitions. Second operand 12 states. [2020-09-15 01:12:46,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:46,342 INFO L93 Difference]: Finished difference Result 77 states and 183 transitions. [2020-09-15 01:12:46,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-15 01:12:46,343 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-15 01:12:46,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:46,344 INFO L225 Difference]: With dead ends: 77 [2020-09-15 01:12:46,344 INFO L226 Difference]: Without dead ends: 69 [2020-09-15 01:12:46,345 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:12:46,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-15 01:12:46,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-09-15 01:12:46,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-15 01:12:46,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-09-15 01:12:46,347 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-09-15 01:12:46,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:46,347 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-09-15 01:12:46,347 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 01:12:46,348 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-09-15 01:12:46,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-15 01:12:46,348 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:46,348 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:46,557 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-09-15 01:12:46,557 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:46,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:46,558 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 37 times [2020-09-15 01:12:46,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:46,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113129367] [2020-09-15 01:12:46,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:46,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:46,682 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:46,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113129367] [2020-09-15 01:12:46,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415367001] [2020-09-15 01:12:46,683 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:46,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:46,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:12:46,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:12:46,756 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:46,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:46,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-15 01:12:46,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406660045] [2020-09-15 01:12:46,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 01:12:46,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:46,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 01:12:46,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-15 01:12:46,758 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-09-15 01:12:46,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:46,948 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-09-15 01:12:46,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-15 01:12:46,949 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-15 01:12:46,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:46,950 INFO L225 Difference]: With dead ends: 84 [2020-09-15 01:12:46,950 INFO L226 Difference]: Without dead ends: 78 [2020-09-15 01:12:46,951 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:12:46,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-15 01:12:46,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-09-15 01:12:46,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-15 01:12:46,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-15 01:12:46,954 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-09-15 01:12:46,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:46,955 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-15 01:12:46,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 01:12:46,955 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-15 01:12:46,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-15 01:12:46,955 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:46,955 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:47,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-09-15 01:12:47,165 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:47,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:47,166 INFO L82 PathProgramCache]: Analyzing trace with hash 333253156, now seen corresponding path program 38 times [2020-09-15 01:12:47,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:47,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539480395] [2020-09-15 01:12:47,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:47,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:47,300 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:47,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539480395] [2020-09-15 01:12:47,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452895248] [2020-09-15 01:12:47,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:47,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:12:47,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:12:47,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:12:47,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:12:47,396 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:12:47,413 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:47,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:47,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-15 01:12:47,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732668411] [2020-09-15 01:12:47,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:12:47,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:47,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:12:47,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:12:47,415 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-09-15 01:12:47,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:47,680 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-09-15 01:12:47,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 01:12:47,681 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-15 01:12:47,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:47,682 INFO L225 Difference]: With dead ends: 81 [2020-09-15 01:12:47,682 INFO L226 Difference]: Without dead ends: 75 [2020-09-15 01:12:47,682 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:12:47,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-15 01:12:47,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2020-09-15 01:12:47,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-15 01:12:47,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-15 01:12:47,685 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-09-15 01:12:47,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:47,685 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-15 01:12:47,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:12:47,686 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-15 01:12:47,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-15 01:12:47,686 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:47,686 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:47,894 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-09-15 01:12:47,894 INFO L427 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:47,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:47,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 39 times [2020-09-15 01:12:47,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:47,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142252216] [2020-09-15 01:12:47,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:47,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:48,010 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:48,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142252216] [2020-09-15 01:12:48,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924350402] [2020-09-15 01:12:48,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:48,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-15 01:12:48,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:12:48,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:12:48,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:12:48,090 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:48,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:48,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-15 01:12:48,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745888291] [2020-09-15 01:12:48,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 01:12:48,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:48,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 01:12:48,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-09-15 01:12:48,091 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-09-15 01:12:48,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:48,402 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-09-15 01:12:48,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-15 01:12:48,403 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-15 01:12:48,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:48,404 INFO L225 Difference]: With dead ends: 78 [2020-09-15 01:12:48,404 INFO L226 Difference]: Without dead ends: 72 [2020-09-15 01:12:48,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:12:48,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-15 01:12:48,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-09-15 01:12:48,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-15 01:12:48,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-15 01:12:48,407 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-09-15 01:12:48,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:48,407 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-15 01:12:48,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 01:12:48,408 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-15 01:12:48,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-15 01:12:48,408 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:48,408 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:48,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-09-15 01:12:48,609 INFO L427 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:48,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:48,610 INFO L82 PathProgramCache]: Analyzing trace with hash 268436742, now seen corresponding path program 40 times [2020-09-15 01:12:48,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:48,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978085737] [2020-09-15 01:12:48,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:48,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:48,753 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:48,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978085737] [2020-09-15 01:12:48,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488892030] [2020-09-15 01:12:48,754 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:48,830 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:12:48,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:12:48,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:12:48,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:12:48,858 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:12:48,873 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:48,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:48,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-15 01:12:48,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234202520] [2020-09-15 01:12:48,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:12:48,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:48,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:12:48,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:12:48,875 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-09-15 01:12:49,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:49,268 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-09-15 01:12:49,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 01:12:49,274 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-15 01:12:49,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:49,275 INFO L225 Difference]: With dead ends: 77 [2020-09-15 01:12:49,275 INFO L226 Difference]: Without dead ends: 71 [2020-09-15 01:12:49,276 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:12:49,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-15 01:12:49,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-09-15 01:12:49,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-15 01:12:49,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-15 01:12:49,279 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-09-15 01:12:49,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:49,279 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-15 01:12:49,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:12:49,281 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-15 01:12:49,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-15 01:12:49,282 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:49,282 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:49,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-09-15 01:12:49,493 INFO L427 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:49,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:49,494 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 41 times [2020-09-15 01:12:49,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:49,495 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588154236] [2020-09-15 01:12:49,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:49,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:49,628 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:49,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588154236] [2020-09-15 01:12:49,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664858203] [2020-09-15 01:12:49,629 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:49,688 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-15 01:12:49,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:12:49,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:12:49,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:12:49,714 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:49,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:49,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-15 01:12:49,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011859835] [2020-09-15 01:12:49,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 01:12:49,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:49,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 01:12:49,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-09-15 01:12:49,716 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-09-15 01:12:50,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:50,077 INFO L93 Difference]: Finished difference Result 74 states and 175 transitions. [2020-09-15 01:12:50,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-15 01:12:50,078 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-15 01:12:50,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:50,079 INFO L225 Difference]: With dead ends: 74 [2020-09-15 01:12:50,079 INFO L226 Difference]: Without dead ends: 68 [2020-09-15 01:12:50,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:12:50,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-15 01:12:50,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-09-15 01:12:50,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-15 01:12:50,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-15 01:12:50,083 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-09-15 01:12:50,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:50,083 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-15 01:12:50,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 01:12:50,084 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-15 01:12:50,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-15 01:12:50,084 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:50,085 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:50,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:50,296 INFO L427 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:50,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:50,296 INFO L82 PathProgramCache]: Analyzing trace with hash 755519592, now seen corresponding path program 42 times [2020-09-15 01:12:50,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:50,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662720775] [2020-09-15 01:12:50,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:50,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:50,424 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:50,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662720775] [2020-09-15 01:12:50,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663022556] [2020-09-15 01:12:50,425 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:50,485 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-15 01:12:50,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:12:50,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:12:50,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:12:50,513 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:12:50,531 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:50,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:50,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-15 01:12:50,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729339178] [2020-09-15 01:12:50,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:12:50,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:50,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:12:50,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:12:50,533 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-09-15 01:12:51,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:51,006 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-09-15 01:12:51,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-15 01:12:51,012 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-15 01:12:51,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:51,013 INFO L225 Difference]: With dead ends: 73 [2020-09-15 01:12:51,013 INFO L226 Difference]: Without dead ends: 67 [2020-09-15 01:12:51,013 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:12:51,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-15 01:12:51,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2020-09-15 01:12:51,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-15 01:12:51,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-15 01:12:51,016 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-09-15 01:12:51,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:51,016 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-15 01:12:51,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:12:51,016 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-15 01:12:51,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-15 01:12:51,017 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:51,017 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:51,224 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-09-15 01:12:51,224 INFO L427 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:51,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:51,225 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 43 times [2020-09-15 01:12:51,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:51,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593978710] [2020-09-15 01:12:51,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:51,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:51,329 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:51,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593978710] [2020-09-15 01:12:51,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637829161] [2020-09-15 01:12:51,330 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:51,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:51,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:12:51,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:12:51,415 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:51,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:51,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-15 01:12:51,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695204684] [2020-09-15 01:12:51,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 01:12:51,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:51,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 01:12:51,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-15 01:12:51,417 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-09-15 01:12:51,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:51,832 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-09-15 01:12:51,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-15 01:12:51,833 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-15 01:12:51,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:51,834 INFO L225 Difference]: With dead ends: 89 [2020-09-15 01:12:51,834 INFO L226 Difference]: Without dead ends: 83 [2020-09-15 01:12:51,835 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:12:51,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-15 01:12:51,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-09-15 01:12:51,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-15 01:12:51,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 153 transitions. [2020-09-15 01:12:51,839 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 153 transitions. Word has length 16 [2020-09-15 01:12:51,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:51,839 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 153 transitions. [2020-09-15 01:12:51,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 01:12:51,839 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 153 transitions. [2020-09-15 01:12:51,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-15 01:12:51,840 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:51,840 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:52,040 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:52,041 INFO L427 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:52,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:52,042 INFO L82 PathProgramCache]: Analyzing trace with hash 756026442, now seen corresponding path program 44 times [2020-09-15 01:12:52,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:52,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070904528] [2020-09-15 01:12:52,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:52,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:52,165 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:52,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070904528] [2020-09-15 01:12:52,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689934104] [2020-09-15 01:12:52,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:52,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:12:52,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:12:52,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-15 01:12:52,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:12:52,277 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:52,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:52,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-15 01:12:52,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031066274] [2020-09-15 01:12:52,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:12:52,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:52,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:12:52,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:12:52,279 INFO L87 Difference]: Start difference. First operand 60 states and 153 transitions. Second operand 13 states. [2020-09-15 01:12:52,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:52,721 INFO L93 Difference]: Finished difference Result 68 states and 165 transitions. [2020-09-15 01:12:52,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-15 01:12:52,722 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-15 01:12:52,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:52,723 INFO L225 Difference]: With dead ends: 68 [2020-09-15 01:12:52,723 INFO L226 Difference]: Without dead ends: 60 [2020-09-15 01:12:52,724 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=532, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:12:52,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-15 01:12:52,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 45. [2020-09-15 01:12:52,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-15 01:12:52,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 108 transitions. [2020-09-15 01:12:52,727 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 108 transitions. Word has length 16 [2020-09-15 01:12:52,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:52,727 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 108 transitions. [2020-09-15 01:12:52,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:12:52,727 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 108 transitions. [2020-09-15 01:12:52,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-15 01:12:52,728 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:52,728 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:52,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-09-15 01:12:52,939 INFO L427 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:52,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:52,939 INFO L82 PathProgramCache]: Analyzing trace with hash 615233972, now seen corresponding path program 45 times [2020-09-15 01:12:52,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:52,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97232668] [2020-09-15 01:12:52,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:52,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:53,066 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:53,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97232668] [2020-09-15 01:12:53,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89906843] [2020-09-15 01:12:53,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:53,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-15 01:12:53,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:12:53,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:12:53,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:12:53,166 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:12:53,180 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:53,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:53,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-15 01:12:53,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273130792] [2020-09-15 01:12:53,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:12:53,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:53,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:12:53,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:12:53,183 INFO L87 Difference]: Start difference. First operand 45 states and 108 transitions. Second operand 13 states. [2020-09-15 01:12:53,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:53,687 INFO L93 Difference]: Finished difference Result 76 states and 183 transitions. [2020-09-15 01:12:53,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-15 01:12:53,687 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-15 01:12:53,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:53,688 INFO L225 Difference]: With dead ends: 76 [2020-09-15 01:12:53,688 INFO L226 Difference]: Without dead ends: 71 [2020-09-15 01:12:53,689 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2020-09-15 01:12:53,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-15 01:12:53,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2020-09-15 01:12:53,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-15 01:12:53,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-09-15 01:12:53,691 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 16 [2020-09-15 01:12:53,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:53,691 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-09-15 01:12:53,692 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:12:53,692 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-09-15 01:12:53,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-15 01:12:53,692 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:53,692 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:53,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:53,899 INFO L427 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:53,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:53,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1961999529, now seen corresponding path program 46 times [2020-09-15 01:12:53,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:53,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251932070] [2020-09-15 01:12:53,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:53,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:54,033 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:54,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251932070] [2020-09-15 01:12:54,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326309240] [2020-09-15 01:12:54,034 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:54,080 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:12:54,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:12:54,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-15 01:12:54,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:12:54,104 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:12:54,125 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:54,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:54,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-15 01:12:54,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107839318] [2020-09-15 01:12:54,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-15 01:12:54,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:54,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-15 01:12:54,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-09-15 01:12:54,127 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 14 states. [2020-09-15 01:12:54,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:54,694 INFO L93 Difference]: Finished difference Result 66 states and 165 transitions. [2020-09-15 01:12:54,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-15 01:12:54,694 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-15 01:12:54,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:54,695 INFO L225 Difference]: With dead ends: 66 [2020-09-15 01:12:54,695 INFO L226 Difference]: Without dead ends: 61 [2020-09-15 01:12:54,696 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-09-15 01:12:54,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-15 01:12:54,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2020-09-15 01:12:54,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-15 01:12:54,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-09-15 01:12:54,699 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 17 [2020-09-15 01:12:54,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:54,699 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-09-15 01:12:54,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-15 01:12:54,699 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-09-15 01:12:54,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-15 01:12:54,700 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:54,700 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:54,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-09-15 01:12:54,904 INFO L427 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:54,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:54,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 47 times [2020-09-15 01:12:54,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:54,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419788564] [2020-09-15 01:12:54,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:54,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:55,061 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:55,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419788564] [2020-09-15 01:12:55,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422401408] [2020-09-15 01:12:55,062 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:55,129 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-15 01:12:55,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:12:55,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-15 01:12:55,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:12:55,159 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:55,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:55,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-15 01:12:55,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567763738] [2020-09-15 01:12:55,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:12:55,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:55,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:12:55,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:12:55,163 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 13 states. [2020-09-15 01:12:55,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:55,401 INFO L93 Difference]: Finished difference Result 72 states and 167 transitions. [2020-09-15 01:12:55,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-15 01:12:55,402 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-15 01:12:55,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:55,404 INFO L225 Difference]: With dead ends: 72 [2020-09-15 01:12:55,404 INFO L226 Difference]: Without dead ends: 66 [2020-09-15 01:12:55,405 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:12:55,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-15 01:12:55,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-09-15 01:12:55,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-15 01:12:55,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-09-15 01:12:55,408 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 17 [2020-09-15 01:12:55,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:55,408 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-09-15 01:12:55,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:12:55,408 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-09-15 01:12:55,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-15 01:12:55,409 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:55,409 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:55,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-09-15 01:12:55,618 INFO L427 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:55,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:55,619 INFO L82 PathProgramCache]: Analyzing trace with hash -666307656, now seen corresponding path program 48 times [2020-09-15 01:12:55,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:55,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431468927] [2020-09-15 01:12:55,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:55,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:55,799 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:55,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431468927] [2020-09-15 01:12:55,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111515655] [2020-09-15 01:12:55,800 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:55,874 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-15 01:12:55,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:12:55,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-15 01:12:55,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:12:55,901 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:12:55,920 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:55,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:55,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-15 01:12:55,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740530080] [2020-09-15 01:12:55,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-15 01:12:55,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:55,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-15 01:12:55,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-09-15 01:12:55,924 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 14 states. [2020-09-15 01:12:56,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:56,236 INFO L93 Difference]: Finished difference Result 82 states and 187 transitions. [2020-09-15 01:12:56,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 01:12:56,237 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-15 01:12:56,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:56,238 INFO L225 Difference]: With dead ends: 82 [2020-09-15 01:12:56,238 INFO L226 Difference]: Without dead ends: 76 [2020-09-15 01:12:56,239 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:12:56,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-15 01:12:56,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-09-15 01:12:56,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-15 01:12:56,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-09-15 01:12:56,241 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 17 [2020-09-15 01:12:56,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:56,242 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-09-15 01:12:56,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-15 01:12:56,242 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-09-15 01:12:56,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-15 01:12:56,242 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:56,243 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:56,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-09-15 01:12:56,450 INFO L427 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:56,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:56,451 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 49 times [2020-09-15 01:12:56,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:56,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342428508] [2020-09-15 01:12:56,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:56,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:56,591 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:56,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342428508] [2020-09-15 01:12:56,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974716727] [2020-09-15 01:12:56,592 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:56,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:56,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-15 01:12:56,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:12:56,682 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:56,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:56,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-15 01:12:56,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755017270] [2020-09-15 01:12:56,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:12:56,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:56,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:12:56,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:12:56,685 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 13 states. [2020-09-15 01:12:57,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:57,038 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2020-09-15 01:12:57,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-15 01:12:57,039 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-15 01:12:57,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:57,041 INFO L225 Difference]: With dead ends: 83 [2020-09-15 01:12:57,041 INFO L226 Difference]: Without dead ends: 77 [2020-09-15 01:12:57,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:12:57,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-15 01:12:57,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-09-15 01:12:57,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-15 01:12:57,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-09-15 01:12:57,045 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 17 [2020-09-15 01:12:57,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:57,045 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-09-15 01:12:57,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:12:57,045 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-09-15 01:12:57,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-15 01:12:57,048 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:57,048 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:57,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-09-15 01:12:57,260 INFO L427 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:57,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:57,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1469627930, now seen corresponding path program 50 times [2020-09-15 01:12:57,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:57,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185610030] [2020-09-15 01:12:57,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:57,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:57,438 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:57,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185610030] [2020-09-15 01:12:57,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924204742] [2020-09-15 01:12:57,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:57,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:12:57,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:12:57,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-15 01:12:57,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:12:57,524 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:12:57,541 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:57,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:57,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-15 01:12:57,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124777025] [2020-09-15 01:12:57,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-15 01:12:57,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:57,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-15 01:12:57,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-15 01:12:57,544 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 14 states. [2020-09-15 01:12:57,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:57,929 INFO L93 Difference]: Finished difference Result 89 states and 203 transitions. [2020-09-15 01:12:57,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 01:12:57,934 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-15 01:12:57,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:57,935 INFO L225 Difference]: With dead ends: 89 [2020-09-15 01:12:57,935 INFO L226 Difference]: Without dead ends: 83 [2020-09-15 01:12:57,935 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:12:57,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-15 01:12:57,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2020-09-15 01:12:57,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-15 01:12:57,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2020-09-15 01:12:57,938 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 17 [2020-09-15 01:12:57,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:57,939 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2020-09-15 01:12:57,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-15 01:12:57,939 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2020-09-15 01:12:57,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-15 01:12:57,939 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:57,939 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:58,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:58,150 INFO L427 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:58,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:58,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 51 times [2020-09-15 01:12:58,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:58,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121866151] [2020-09-15 01:12:58,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:58,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:58,291 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:58,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121866151] [2020-09-15 01:12:58,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095203530] [2020-09-15 01:12:58,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:58,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-15 01:12:58,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:12:58,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-15 01:12:58,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:12:58,392 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:58,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:58,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-15 01:12:58,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763605801] [2020-09-15 01:12:58,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:12:58,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:58,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:12:58,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:12:58,394 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 13 states. [2020-09-15 01:12:58,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:58,793 INFO L93 Difference]: Finished difference Result 89 states and 205 transitions. [2020-09-15 01:12:58,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-15 01:12:58,793 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-15 01:12:58,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:58,794 INFO L225 Difference]: With dead ends: 89 [2020-09-15 01:12:58,794 INFO L226 Difference]: Without dead ends: 83 [2020-09-15 01:12:58,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:12:58,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-15 01:12:58,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 57. [2020-09-15 01:12:58,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-15 01:12:58,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-15 01:12:58,797 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 17 [2020-09-15 01:12:58,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:58,797 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-15 01:12:58,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:12:58,797 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-15 01:12:58,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-15 01:12:58,798 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:58,798 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:59,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:59,006 INFO L427 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:59,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:59,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1404811516, now seen corresponding path program 52 times [2020-09-15 01:12:59,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:59,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772274855] [2020-09-15 01:12:59,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:59,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:12:59,150 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:59,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772274855] [2020-09-15 01:12:59,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373692508] [2020-09-15 01:12:59,151 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:12:59,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:12:59,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:12:59,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-15 01:12:59,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:12:59,225 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:12:59,239 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:59,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:59,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-15 01:12:59,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716032517] [2020-09-15 01:12:59,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-15 01:12:59,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:59,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-15 01:12:59,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-09-15 01:12:59,241 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 14 states. [2020-09-15 01:12:59,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:12:59,721 INFO L93 Difference]: Finished difference Result 86 states and 199 transitions. [2020-09-15 01:12:59,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-15 01:12:59,722 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-15 01:12:59,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:12:59,723 INFO L225 Difference]: With dead ends: 86 [2020-09-15 01:12:59,723 INFO L226 Difference]: Without dead ends: 80 [2020-09-15 01:12:59,723 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=585, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:12:59,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-15 01:12:59,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2020-09-15 01:12:59,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-15 01:12:59,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-15 01:12:59,726 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 17 [2020-09-15 01:12:59,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:12:59,727 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-15 01:12:59,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-15 01:12:59,727 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-15 01:12:59,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-15 01:12:59,728 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:12:59,728 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:12:59,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-09-15 01:12:59,938 INFO L427 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:12:59,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:12:59,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 53 times [2020-09-15 01:12:59,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:12:59,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352887586] [2020-09-15 01:12:59,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:12:59,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:00,070 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:00,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352887586] [2020-09-15 01:13:00,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925984222] [2020-09-15 01:13:00,071 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:00,127 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-15 01:13:00,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:13:00,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-15 01:13:00,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:00,149 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:00,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:00,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-15 01:13:00,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263537182] [2020-09-15 01:13:00,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:13:00,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:00,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:13:00,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:13:00,152 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 13 states. [2020-09-15 01:13:00,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:00,604 INFO L93 Difference]: Finished difference Result 87 states and 203 transitions. [2020-09-15 01:13:00,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-15 01:13:00,605 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-15 01:13:00,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:00,606 INFO L225 Difference]: With dead ends: 87 [2020-09-15 01:13:00,606 INFO L226 Difference]: Without dead ends: 81 [2020-09-15 01:13:00,607 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-09-15 01:13:00,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-15 01:13:00,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 59. [2020-09-15 01:13:00,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-15 01:13:00,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-09-15 01:13:00,610 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 17 [2020-09-15 01:13:00,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:00,610 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-09-15 01:13:00,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:13:00,610 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-09-15 01:13:00,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-15 01:13:00,611 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:00,611 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:00,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:00,820 INFO L427 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:00,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:00,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1891894366, now seen corresponding path program 54 times [2020-09-15 01:13:00,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:00,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216806649] [2020-09-15 01:13:00,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:00,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:00,960 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:00,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216806649] [2020-09-15 01:13:00,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007736516] [2020-09-15 01:13:00,961 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:01,022 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-15 01:13:01,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:13:01,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-15 01:13:01,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:01,048 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:13:01,065 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:01,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:01,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-15 01:13:01,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277829467] [2020-09-15 01:13:01,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-15 01:13:01,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:01,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-15 01:13:01,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-15 01:13:01,067 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-09-15 01:13:01,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:01,620 INFO L93 Difference]: Finished difference Result 84 states and 197 transitions. [2020-09-15 01:13:01,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-15 01:13:01,621 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-15 01:13:01,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:01,622 INFO L225 Difference]: With dead ends: 84 [2020-09-15 01:13:01,622 INFO L226 Difference]: Without dead ends: 78 [2020-09-15 01:13:01,623 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=274, Invalid=656, Unknown=0, NotChecked=0, Total=930 [2020-09-15 01:13:01,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-15 01:13:01,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2020-09-15 01:13:01,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-15 01:13:01,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-09-15 01:13:01,626 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 17 [2020-09-15 01:13:01,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:01,626 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-09-15 01:13:01,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-15 01:13:01,627 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-09-15 01:13:01,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-15 01:13:01,627 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:01,627 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:01,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-09-15 01:13:01,838 INFO L427 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:01,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:01,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 55 times [2020-09-15 01:13:01,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:01,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869335021] [2020-09-15 01:13:01,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:01,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:01,967 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:01,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869335021] [2020-09-15 01:13:01,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280983988] [2020-09-15 01:13:01,968 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:02,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:02,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-15 01:13:02,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:02,050 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:02,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:02,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-15 01:13:02,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486397974] [2020-09-15 01:13:02,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:13:02,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:02,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:13:02,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:13:02,052 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 13 states. [2020-09-15 01:13:02,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:02,550 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-09-15 01:13:02,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-15 01:13:02,550 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-15 01:13:02,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:02,552 INFO L225 Difference]: With dead ends: 104 [2020-09-15 01:13:02,552 INFO L226 Difference]: Without dead ends: 98 [2020-09-15 01:13:02,552 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=326, Invalid=666, Unknown=0, NotChecked=0, Total=992 [2020-09-15 01:13:02,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-15 01:13:02,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2020-09-15 01:13:02,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-15 01:13:02,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions. [2020-09-15 01:13:02,556 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 17 [2020-09-15 01:13:02,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:02,556 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 165 transitions. [2020-09-15 01:13:02,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:13:02,556 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions. [2020-09-15 01:13:02,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-15 01:13:02,557 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:02,557 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:02,768 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-09-15 01:13:02,768 INFO L427 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:02,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:02,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1892401216, now seen corresponding path program 56 times [2020-09-15 01:13:02,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:02,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985868745] [2020-09-15 01:13:02,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:02,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:02,903 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:02,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985868745] [2020-09-15 01:13:02,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071560296] [2020-09-15 01:13:02,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:02,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:13:02,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:13:02,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-15 01:13:02,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:02,987 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:13:03,005 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:03,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:03,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-15 01:13:03,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349826954] [2020-09-15 01:13:03,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-15 01:13:03,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:03,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-15 01:13:03,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-09-15 01:13:03,007 INFO L87 Difference]: Start difference. First operand 64 states and 165 transitions. Second operand 14 states. [2020-09-15 01:13:03,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:03,647 INFO L93 Difference]: Finished difference Result 85 states and 203 transitions. [2020-09-15 01:13:03,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-15 01:13:03,648 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-15 01:13:03,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:03,649 INFO L225 Difference]: With dead ends: 85 [2020-09-15 01:13:03,649 INFO L226 Difference]: Without dead ends: 77 [2020-09-15 01:13:03,650 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2020-09-15 01:13:03,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-15 01:13:03,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2020-09-15 01:13:03,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-15 01:13:03,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-09-15 01:13:03,652 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-09-15 01:13:03,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:03,653 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-09-15 01:13:03,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-15 01:13:03,653 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-09-15 01:13:03,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-15 01:13:03,653 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:03,654 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:03,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-09-15 01:13:03,862 INFO L427 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:03,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:03,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 57 times [2020-09-15 01:13:03,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:03,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022957869] [2020-09-15 01:13:03,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:03,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:04,055 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:04,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022957869] [2020-09-15 01:13:04,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781238135] [2020-09-15 01:13:04,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:04,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-15 01:13:04,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:13:04,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-15 01:13:04,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:04,134 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:04,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:04,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-15 01:13:04,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135434577] [2020-09-15 01:13:04,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-15 01:13:04,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:04,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-15 01:13:04,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-09-15 01:13:04,136 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-09-15 01:13:04,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:04,447 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-09-15 01:13:04,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-15 01:13:04,447 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-15 01:13:04,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:04,449 INFO L225 Difference]: With dead ends: 94 [2020-09-15 01:13:04,449 INFO L226 Difference]: Without dead ends: 88 [2020-09-15 01:13:04,449 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:13:04,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-15 01:13:04,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 63. [2020-09-15 01:13:04,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-15 01:13:04,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-15 01:13:04,451 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-15 01:13:04,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:04,451 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-15 01:13:04,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-15 01:13:04,451 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-15 01:13:04,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-15 01:13:04,452 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:04,452 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:04,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-09-15 01:13:04,661 INFO L427 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:04,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:04,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1866248349, now seen corresponding path program 58 times [2020-09-15 01:13:04,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:04,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823231214] [2020-09-15 01:13:04,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:04,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:04,818 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:04,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823231214] [2020-09-15 01:13:04,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609384227] [2020-09-15 01:13:04,819 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:04,869 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:13:04,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:13:04,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-15 01:13:04,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:04,893 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:13:04,906 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:04,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:04,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-15 01:13:04,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464344837] [2020-09-15 01:13:04,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:13:04,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:04,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:13:04,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:13:04,908 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-15 01:13:05,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:05,313 INFO L93 Difference]: Finished difference Result 91 states and 213 transitions. [2020-09-15 01:13:05,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 01:13:05,313 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-15 01:13:05,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:05,314 INFO L225 Difference]: With dead ends: 91 [2020-09-15 01:13:05,315 INFO L226 Difference]: Without dead ends: 85 [2020-09-15 01:13:05,315 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:13:05,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-15 01:13:05,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-09-15 01:13:05,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-15 01:13:05,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-15 01:13:05,317 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-15 01:13:05,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:05,317 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-15 01:13:05,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:13:05,317 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-15 01:13:05,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-15 01:13:05,318 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:05,318 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:05,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-09-15 01:13:05,519 INFO L427 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:05,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:05,519 INFO L82 PathProgramCache]: Analyzing trace with hash -250055839, now seen corresponding path program 59 times [2020-09-15 01:13:05,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:05,520 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795871478] [2020-09-15 01:13:05,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:05,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:05,708 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:05,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795871478] [2020-09-15 01:13:05,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629628054] [2020-09-15 01:13:05,709 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:05,767 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-15 01:13:05,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:13:05,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-15 01:13:05,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:05,783 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:05,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:05,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-15 01:13:05,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942019563] [2020-09-15 01:13:05,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-15 01:13:05,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:05,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-15 01:13:05,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-09-15 01:13:05,785 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-15 01:13:06,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:06,157 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-09-15 01:13:06,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-15 01:13:06,158 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-15 01:13:06,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:06,159 INFO L225 Difference]: With dead ends: 88 [2020-09-15 01:13:06,159 INFO L226 Difference]: Without dead ends: 82 [2020-09-15 01:13:06,160 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=504, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:13:06,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-15 01:13:06,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2020-09-15 01:13:06,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-15 01:13:06,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-15 01:13:06,162 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-15 01:13:06,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:06,163 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-15 01:13:06,163 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-15 01:13:06,163 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-15 01:13:06,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-15 01:13:06,164 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:06,164 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:06,374 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:06,374 INFO L427 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:06,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:06,375 INFO L82 PathProgramCache]: Analyzing trace with hash 269687237, now seen corresponding path program 60 times [2020-09-15 01:13:06,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:06,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671361687] [2020-09-15 01:13:06,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:06,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:06,560 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:06,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671361687] [2020-09-15 01:13:06,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335670771] [2020-09-15 01:13:06,560 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:06,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-15 01:13:06,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:13:06,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-15 01:13:06,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:06,655 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:13:06,668 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:06,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:06,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-15 01:13:06,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657294099] [2020-09-15 01:13:06,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:13:06,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:06,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:13:06,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:13:06,670 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-15 01:13:07,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:07,199 INFO L93 Difference]: Finished difference Result 87 states and 205 transitions. [2020-09-15 01:13:07,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-15 01:13:07,200 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-15 01:13:07,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:07,201 INFO L225 Difference]: With dead ends: 87 [2020-09-15 01:13:07,201 INFO L226 Difference]: Without dead ends: 81 [2020-09-15 01:13:07,201 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2020-09-15 01:13:07,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-15 01:13:07,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2020-09-15 01:13:07,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-15 01:13:07,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-15 01:13:07,209 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-15 01:13:07,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:07,210 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-15 01:13:07,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:13:07,210 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-15 01:13:07,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-15 01:13:07,211 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:07,211 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:07,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:07,414 INFO L427 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:07,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:07,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1924998467, now seen corresponding path program 61 times [2020-09-15 01:13:07,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:07,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921935743] [2020-09-15 01:13:07,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:07,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:07,574 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:07,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921935743] [2020-09-15 01:13:07,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36401534] [2020-09-15 01:13:07,575 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:07,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:07,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-15 01:13:07,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:07,671 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:07,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:07,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-15 01:13:07,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445999800] [2020-09-15 01:13:07,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-15 01:13:07,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:07,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-15 01:13:07,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-15 01:13:07,673 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-15 01:13:08,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:08,137 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-09-15 01:13:08,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-15 01:13:08,138 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-15 01:13:08,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:08,139 INFO L225 Difference]: With dead ends: 84 [2020-09-15 01:13:08,139 INFO L226 Difference]: Without dead ends: 78 [2020-09-15 01:13:08,140 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:13:08,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-15 01:13:08,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 63. [2020-09-15 01:13:08,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-15 01:13:08,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-15 01:13:08,143 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-15 01:13:08,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:08,143 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-15 01:13:08,143 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-15 01:13:08,143 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-15 01:13:08,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-15 01:13:08,144 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:08,144 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:08,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-09-15 01:13:08,349 INFO L427 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:08,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:08,350 INFO L82 PathProgramCache]: Analyzing trace with hash 204870823, now seen corresponding path program 62 times [2020-09-15 01:13:08,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:08,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777240204] [2020-09-15 01:13:08,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:08,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:08,523 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:08,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777240204] [2020-09-15 01:13:08,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765104812] [2020-09-15 01:13:08,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:08,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:13:08,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:13:08,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-15 01:13:08,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:08,617 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:13:08,638 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:08,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:08,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-15 01:13:08,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266596217] [2020-09-15 01:13:08,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:13:08,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:08,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:13:08,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:13:08,641 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-15 01:13:09,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:09,250 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-09-15 01:13:09,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-15 01:13:09,251 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-15 01:13:09,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:09,252 INFO L225 Difference]: With dead ends: 83 [2020-09-15 01:13:09,252 INFO L226 Difference]: Without dead ends: 77 [2020-09-15 01:13:09,253 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-09-15 01:13:09,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-15 01:13:09,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2020-09-15 01:13:09,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-15 01:13:09,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-15 01:13:09,256 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-15 01:13:09,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:09,256 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-15 01:13:09,257 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:13:09,257 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-15 01:13:09,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-15 01:13:09,257 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:09,257 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:09,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:09,459 INFO L427 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:09,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:09,460 INFO L82 PathProgramCache]: Analyzing trace with hash 675866533, now seen corresponding path program 63 times [2020-09-15 01:13:09,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:09,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713195968] [2020-09-15 01:13:09,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:09,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:09,621 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:09,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713195968] [2020-09-15 01:13:09,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391365064] [2020-09-15 01:13:09,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:09,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-15 01:13:09,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:13:09,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-15 01:13:09,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:09,707 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:09,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:09,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-15 01:13:09,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766953100] [2020-09-15 01:13:09,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-15 01:13:09,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:09,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-15 01:13:09,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-09-15 01:13:09,708 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-15 01:13:10,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:10,193 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-09-15 01:13:10,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-15 01:13:10,194 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-15 01:13:10,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:10,194 INFO L225 Difference]: With dead ends: 80 [2020-09-15 01:13:10,195 INFO L226 Difference]: Without dead ends: 74 [2020-09-15 01:13:10,195 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=654, Unknown=0, NotChecked=0, Total=930 [2020-09-15 01:13:10,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-09-15 01:13:10,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2020-09-15 01:13:10,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-15 01:13:10,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-15 01:13:10,198 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-15 01:13:10,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:10,199 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-15 01:13:10,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-15 01:13:10,199 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-15 01:13:10,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-15 01:13:10,199 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:10,200 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:10,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-09-15 01:13:10,409 INFO L427 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:10,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:10,410 INFO L82 PathProgramCache]: Analyzing trace with hash 691953673, now seen corresponding path program 64 times [2020-09-15 01:13:10,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:10,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052154611] [2020-09-15 01:13:10,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:10,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:10,569 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:10,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052154611] [2020-09-15 01:13:10,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87356137] [2020-09-15 01:13:10,570 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:10,626 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:13:10,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:13:10,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-15 01:13:10,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:10,660 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:13:10,676 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:10,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:10,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-15 01:13:10,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114704234] [2020-09-15 01:13:10,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:13:10,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:10,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:13:10,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:13:10,680 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-15 01:13:11,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:11,371 INFO L93 Difference]: Finished difference Result 79 states and 189 transitions. [2020-09-15 01:13:11,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-15 01:13:11,372 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-15 01:13:11,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:11,373 INFO L225 Difference]: With dead ends: 79 [2020-09-15 01:13:11,373 INFO L226 Difference]: Without dead ends: 73 [2020-09-15 01:13:11,374 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=332, Invalid=790, Unknown=0, NotChecked=0, Total=1122 [2020-09-15 01:13:11,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-15 01:13:11,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2020-09-15 01:13:11,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-15 01:13:11,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-15 01:13:11,376 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-15 01:13:11,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:11,377 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-15 01:13:11,377 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:13:11,377 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-15 01:13:11,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-15 01:13:11,377 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:11,377 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:11,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:11,578 INFO L427 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:11,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:11,579 INFO L82 PathProgramCache]: Analyzing trace with hash 692443783, now seen corresponding path program 65 times [2020-09-15 01:13:11,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:11,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187685415] [2020-09-15 01:13:11,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:11,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:11,702 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:11,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187685415] [2020-09-15 01:13:11,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209830091] [2020-09-15 01:13:11,703 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:11,761 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-15 01:13:11,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:13:11,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-15 01:13:11,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:11,788 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:11,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:11,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-15 01:13:11,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429060830] [2020-09-15 01:13:11,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-15 01:13:11,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:11,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-15 01:13:11,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-09-15 01:13:11,791 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-15 01:13:12,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:12,346 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-09-15 01:13:12,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-15 01:13:12,347 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-15 01:13:12,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:12,348 INFO L225 Difference]: With dead ends: 95 [2020-09-15 01:13:12,348 INFO L226 Difference]: Without dead ends: 89 [2020-09-15 01:13:12,348 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=339, Invalid=717, Unknown=0, NotChecked=0, Total=1056 [2020-09-15 01:13:12,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-15 01:13:12,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 66. [2020-09-15 01:13:12,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-15 01:13:12,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 169 transitions. [2020-09-15 01:13:12,351 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 169 transitions. Word has length 18 [2020-09-15 01:13:12,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:12,351 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 169 transitions. [2020-09-15 01:13:12,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-15 01:13:12,351 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 169 transitions. [2020-09-15 01:13:12,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-15 01:13:12,352 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:12,352 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:12,552 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-09-15 01:13:12,553 INFO L427 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:12,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:12,553 INFO L82 PathProgramCache]: Analyzing trace with hash 692460523, now seen corresponding path program 66 times [2020-09-15 01:13:12,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:12,554 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013115002] [2020-09-15 01:13:12,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:12,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:12,697 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:12,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013115002] [2020-09-15 01:13:12,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797546568] [2020-09-15 01:13:12,698 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:12,759 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-15 01:13:12,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:13:12,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-15 01:13:12,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:12,784 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:13:12,799 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:12,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:12,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-15 01:13:12,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519473232] [2020-09-15 01:13:12,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:13:12,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:12,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:13:12,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:13:12,801 INFO L87 Difference]: Start difference. First operand 66 states and 169 transitions. Second operand 15 states. [2020-09-15 01:13:13,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:13,512 INFO L93 Difference]: Finished difference Result 76 states and 185 transitions. [2020-09-15 01:13:13,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-15 01:13:13,513 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-15 01:13:13,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:13,513 INFO L225 Difference]: With dead ends: 76 [2020-09-15 01:13:13,514 INFO L226 Difference]: Without dead ends: 68 [2020-09-15 01:13:13,514 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=402, Invalid=858, Unknown=0, NotChecked=0, Total=1260 [2020-09-15 01:13:13,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-15 01:13:13,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 49. [2020-09-15 01:13:13,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-15 01:13:13,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 118 transitions. [2020-09-15 01:13:13,516 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 118 transitions. Word has length 18 [2020-09-15 01:13:13,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:13,517 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 118 transitions. [2020-09-15 01:13:13,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:13:13,517 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 118 transitions. [2020-09-15 01:13:13,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-15 01:13:13,517 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:13,517 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:13,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:13,718 INFO L427 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:13,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:13,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1465088141, now seen corresponding path program 67 times [2020-09-15 01:13:13,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:13,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820754875] [2020-09-15 01:13:13,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:13,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:13,870 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:13,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820754875] [2020-09-15 01:13:13,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729057087] [2020-09-15 01:13:13,871 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:13,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:13,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-15 01:13:13,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:13,953 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:13:13,972 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:13,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:13,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-15 01:13:13,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738438649] [2020-09-15 01:13:13,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:13:13,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:13,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:13:13,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:13:13,974 INFO L87 Difference]: Start difference. First operand 49 states and 118 transitions. Second operand 15 states. [2020-09-15 01:13:14,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:14,656 INFO L93 Difference]: Finished difference Result 84 states and 203 transitions. [2020-09-15 01:13:14,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-15 01:13:14,656 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-15 01:13:14,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:14,657 INFO L225 Difference]: With dead ends: 84 [2020-09-15 01:13:14,657 INFO L226 Difference]: Without dead ends: 79 [2020-09-15 01:13:14,658 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2020-09-15 01:13:14,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-15 01:13:14,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2020-09-15 01:13:14,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-15 01:13:14,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-09-15 01:13:14,660 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 18 [2020-09-15 01:13:14,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:14,661 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-09-15 01:13:14,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:13:14,661 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-09-15 01:13:14,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-15 01:13:14,661 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:14,662 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:14,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-09-15 01:13:14,866 INFO L427 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:14,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:14,867 INFO L82 PathProgramCache]: Analyzing trace with hash -8543960, now seen corresponding path program 68 times [2020-09-15 01:13:14,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:14,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335209445] [2020-09-15 01:13:14,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:14,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:15,030 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:15,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335209445] [2020-09-15 01:13:15,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999896768] [2020-09-15 01:13:15,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:15,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:13:15,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:13:15,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-15 01:13:15,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:15,113 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:13:15,131 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:15,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:15,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-15 01:13:15,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595477022] [2020-09-15 01:13:15,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 01:13:15,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:15,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 01:13:15,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-09-15 01:13:15,133 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 16 states. [2020-09-15 01:13:15,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:15,867 INFO L93 Difference]: Finished difference Result 72 states and 181 transitions. [2020-09-15 01:13:15,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-15 01:13:15,868 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-15 01:13:15,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:15,868 INFO L225 Difference]: With dead ends: 72 [2020-09-15 01:13:15,869 INFO L226 Difference]: Without dead ends: 67 [2020-09-15 01:13:15,869 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=439, Invalid=893, Unknown=0, NotChecked=0, Total=1332 [2020-09-15 01:13:15,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-15 01:13:15,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-09-15 01:13:15,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-15 01:13:15,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 122 transitions. [2020-09-15 01:13:15,872 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 122 transitions. Word has length 19 [2020-09-15 01:13:15,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:15,872 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 122 transitions. [2020-09-15 01:13:15,872 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 01:13:15,872 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 122 transitions. [2020-09-15 01:13:15,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-15 01:13:15,873 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:15,873 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:16,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-09-15 01:13:16,074 INFO L427 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:16,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:16,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1356705901, now seen corresponding path program 69 times [2020-09-15 01:13:16,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:16,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458299528] [2020-09-15 01:13:16,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:16,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:16,305 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:16,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458299528] [2020-09-15 01:13:16,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853492970] [2020-09-15 01:13:16,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:16,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-15 01:13:16,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:13:16,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-15 01:13:16,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:16,381 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:16,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:16,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-15 01:13:16,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622898976] [2020-09-15 01:13:16,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:13:16,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:16,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:13:16,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:13:16,383 INFO L87 Difference]: Start difference. First operand 50 states and 122 transitions. Second operand 15 states. [2020-09-15 01:13:16,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:16,700 INFO L93 Difference]: Finished difference Result 78 states and 181 transitions. [2020-09-15 01:13:16,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-15 01:13:16,701 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-15 01:13:16,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:16,702 INFO L225 Difference]: With dead ends: 78 [2020-09-15 01:13:16,702 INFO L226 Difference]: Without dead ends: 72 [2020-09-15 01:13:16,702 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:13:16,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-15 01:13:16,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58. [2020-09-15 01:13:16,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-15 01:13:16,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 141 transitions. [2020-09-15 01:13:16,705 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 141 transitions. Word has length 19 [2020-09-15 01:13:16,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:16,705 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 141 transitions. [2020-09-15 01:13:16,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:13:16,705 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 141 transitions. [2020-09-15 01:13:16,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-15 01:13:16,706 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:16,706 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:16,906 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:16,907 INFO L427 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:16,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:16,907 INFO L82 PathProgramCache]: Analyzing trace with hash -371514377, now seen corresponding path program 70 times [2020-09-15 01:13:16,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:16,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691687226] [2020-09-15 01:13:16,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:16,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:17,132 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:17,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691687226] [2020-09-15 01:13:17,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869995188] [2020-09-15 01:13:17,133 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:17,190 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:13:17,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:13:17,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-15 01:13:17,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:17,214 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:13:17,225 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:17,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:17,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-15 01:13:17,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646203723] [2020-09-15 01:13:17,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 01:13:17,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:17,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 01:13:17,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-09-15 01:13:17,227 INFO L87 Difference]: Start difference. First operand 58 states and 141 transitions. Second operand 16 states. [2020-09-15 01:13:17,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:17,600 INFO L93 Difference]: Finished difference Result 90 states and 205 transitions. [2020-09-15 01:13:17,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 01:13:17,601 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-15 01:13:17,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:17,602 INFO L225 Difference]: With dead ends: 90 [2020-09-15 01:13:17,602 INFO L226 Difference]: Without dead ends: 84 [2020-09-15 01:13:17,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:13:17,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-15 01:13:17,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 56. [2020-09-15 01:13:17,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-15 01:13:17,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 137 transitions. [2020-09-15 01:13:17,605 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 137 transitions. Word has length 19 [2020-09-15 01:13:17,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:17,605 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 137 transitions. [2020-09-15 01:13:17,605 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 01:13:17,605 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 137 transitions. [2020-09-15 01:13:17,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-15 01:13:17,606 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:17,606 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:17,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:17,814 INFO L427 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:17,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:17,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1988673419, now seen corresponding path program 71 times [2020-09-15 01:13:17,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:17,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519752617] [2020-09-15 01:13:17,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:17,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:18,032 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:18,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519752617] [2020-09-15 01:13:18,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7494409] [2020-09-15 01:13:18,033 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:18,099 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-15 01:13:18,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:13:18,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-15 01:13:18,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:18,119 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:18,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:18,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-15 01:13:18,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823259746] [2020-09-15 01:13:18,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:13:18,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:18,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:13:18,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:13:18,121 INFO L87 Difference]: Start difference. First operand 56 states and 137 transitions. Second operand 15 states. [2020-09-15 01:13:18,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:18,541 INFO L93 Difference]: Finished difference Result 91 states and 209 transitions. [2020-09-15 01:13:18,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-15 01:13:18,541 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-15 01:13:18,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:18,542 INFO L225 Difference]: With dead ends: 91 [2020-09-15 01:13:18,542 INFO L226 Difference]: Without dead ends: 85 [2020-09-15 01:13:18,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:13:18,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-15 01:13:18,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 59. [2020-09-15 01:13:18,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-15 01:13:18,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 145 transitions. [2020-09-15 01:13:18,546 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 145 transitions. Word has length 19 [2020-09-15 01:13:18,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:18,546 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 145 transitions. [2020-09-15 01:13:18,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:13:18,547 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 145 transitions. [2020-09-15 01:13:18,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-15 01:13:18,547 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:18,547 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:18,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:18,757 INFO L427 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:18,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:18,758 INFO L82 PathProgramCache]: Analyzing trace with hash -731783719, now seen corresponding path program 72 times [2020-09-15 01:13:18,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:18,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63710233] [2020-09-15 01:13:18,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:18,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:18,934 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:18,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63710233] [2020-09-15 01:13:18,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408944646] [2020-09-15 01:13:18,935 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:18,993 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-15 01:13:18,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:13:18,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-15 01:13:18,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:19,021 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:13:19,039 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:19,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:19,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-15 01:13:19,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985698392] [2020-09-15 01:13:19,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 01:13:19,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:19,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 01:13:19,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-09-15 01:13:19,041 INFO L87 Difference]: Start difference. First operand 59 states and 145 transitions. Second operand 16 states. [2020-09-15 01:13:19,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:19,575 INFO L93 Difference]: Finished difference Result 99 states and 225 transitions. [2020-09-15 01:13:19,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-15 01:13:19,576 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-15 01:13:19,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:19,577 INFO L225 Difference]: With dead ends: 99 [2020-09-15 01:13:19,577 INFO L226 Difference]: Without dead ends: 93 [2020-09-15 01:13:19,578 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=257, Invalid=673, Unknown=0, NotChecked=0, Total=930 [2020-09-15 01:13:19,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-15 01:13:19,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 58. [2020-09-15 01:13:19,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-15 01:13:19,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-09-15 01:13:19,591 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 19 [2020-09-15 01:13:19,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:19,591 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-09-15 01:13:19,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 01:13:19,591 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-09-15 01:13:19,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-15 01:13:19,592 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:19,592 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:19,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:19,800 INFO L427 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:19,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:19,801 INFO L82 PathProgramCache]: Analyzing trace with hash 884408791, now seen corresponding path program 73 times [2020-09-15 01:13:19,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:19,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569041578] [2020-09-15 01:13:19,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:19,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:20,022 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:20,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569041578] [2020-09-15 01:13:20,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265254981] [2020-09-15 01:13:20,023 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:20,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:20,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-15 01:13:20,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:20,098 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:20,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:20,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-15 01:13:20,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972576258] [2020-09-15 01:13:20,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:13:20,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:20,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:13:20,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:13:20,100 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 15 states. [2020-09-15 01:13:20,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:20,578 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-09-15 01:13:20,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-15 01:13:20,578 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-15 01:13:20,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:20,580 INFO L225 Difference]: With dead ends: 99 [2020-09-15 01:13:20,580 INFO L226 Difference]: Without dead ends: 93 [2020-09-15 01:13:20,580 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-09-15 01:13:20,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-15 01:13:20,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 61. [2020-09-15 01:13:20,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-15 01:13:20,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 151 transitions. [2020-09-15 01:13:20,583 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 151 transitions. Word has length 19 [2020-09-15 01:13:20,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:20,583 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 151 transitions. [2020-09-15 01:13:20,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:13:20,584 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 151 transitions. [2020-09-15 01:13:20,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-15 01:13:20,584 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:20,584 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:20,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-09-15 01:13:20,792 INFO L427 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:20,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:20,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1404151867, now seen corresponding path program 74 times [2020-09-15 01:13:20,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:20,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887657812] [2020-09-15 01:13:20,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:20,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:20,986 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:20,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887657812] [2020-09-15 01:13:20,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586129715] [2020-09-15 01:13:20,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:21,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:13:21,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:13:21,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-15 01:13:21,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:21,072 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:13:21,086 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:21,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:21,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-15 01:13:21,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156098727] [2020-09-15 01:13:21,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 01:13:21,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:21,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 01:13:21,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-09-15 01:13:21,088 INFO L87 Difference]: Start difference. First operand 61 states and 151 transitions. Second operand 16 states. [2020-09-15 01:13:21,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:21,673 INFO L93 Difference]: Finished difference Result 96 states and 221 transitions. [2020-09-15 01:13:21,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-15 01:13:21,673 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-15 01:13:21,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:21,675 INFO L225 Difference]: With dead ends: 96 [2020-09-15 01:13:21,675 INFO L226 Difference]: Without dead ends: 90 [2020-09-15 01:13:21,676 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=286, Invalid=770, Unknown=0, NotChecked=0, Total=1056 [2020-09-15 01:13:21,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-15 01:13:21,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 60. [2020-09-15 01:13:21,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-15 01:13:21,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 149 transitions. [2020-09-15 01:13:21,678 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 149 transitions. Word has length 19 [2020-09-15 01:13:21,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:21,679 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 149 transitions. [2020-09-15 01:13:21,679 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 01:13:21,679 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 149 transitions. [2020-09-15 01:13:21,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-15 01:13:21,679 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:21,679 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:21,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:21,880 INFO L427 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:21,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:21,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1235504199, now seen corresponding path program 75 times [2020-09-15 01:13:21,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:21,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040011116] [2020-09-15 01:13:21,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:21,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:22,046 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:22,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040011116] [2020-09-15 01:13:22,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500214634] [2020-09-15 01:13:22,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:22,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-15 01:13:22,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:13:22,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-15 01:13:22,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:22,134 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:22,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:22,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-15 01:13:22,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387185067] [2020-09-15 01:13:22,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:13:22,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:22,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:13:22,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:13:22,135 INFO L87 Difference]: Start difference. First operand 60 states and 149 transitions. Second operand 15 states. [2020-09-15 01:13:22,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:22,650 INFO L93 Difference]: Finished difference Result 97 states and 225 transitions. [2020-09-15 01:13:22,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-15 01:13:22,650 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-15 01:13:22,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:22,651 INFO L225 Difference]: With dead ends: 97 [2020-09-15 01:13:22,652 INFO L226 Difference]: Without dead ends: 91 [2020-09-15 01:13:22,652 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=322, Invalid=800, Unknown=0, NotChecked=0, Total=1122 [2020-09-15 01:13:22,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-15 01:13:22,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 63. [2020-09-15 01:13:22,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-15 01:13:22,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-15 01:13:22,654 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 19 [2020-09-15 01:13:22,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:22,655 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-15 01:13:22,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:13:22,655 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-15 01:13:22,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-15 01:13:22,655 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:22,655 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:22,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-09-15 01:13:22,856 INFO L427 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:22,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:22,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1339335453, now seen corresponding path program 76 times [2020-09-15 01:13:22,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:22,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523490457] [2020-09-15 01:13:22,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:22,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:23,023 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:23,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523490457] [2020-09-15 01:13:23,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322621587] [2020-09-15 01:13:23,024 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:23,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:13:23,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:13:23,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-15 01:13:23,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:23,151 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:13:23,171 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:23,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:23,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-15 01:13:23,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908570417] [2020-09-15 01:13:23,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 01:13:23,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:23,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 01:13:23,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-09-15 01:13:23,173 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 16 states. [2020-09-15 01:13:23,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:23,842 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-09-15 01:13:23,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-15 01:13:23,843 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-15 01:13:23,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:23,844 INFO L225 Difference]: With dead ends: 94 [2020-09-15 01:13:23,844 INFO L226 Difference]: Without dead ends: 88 [2020-09-15 01:13:23,845 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=331, Invalid=859, Unknown=0, NotChecked=0, Total=1190 [2020-09-15 01:13:23,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-15 01:13:23,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 62. [2020-09-15 01:13:23,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-15 01:13:23,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-15 01:13:23,848 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 19 [2020-09-15 01:13:23,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:23,848 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-15 01:13:23,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 01:13:23,848 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-15 01:13:23,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-15 01:13:23,849 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:23,849 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:24,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:24,058 INFO L427 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:24,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:24,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1810331163, now seen corresponding path program 77 times [2020-09-15 01:13:24,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:24,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958218140] [2020-09-15 01:13:24,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:24,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:24,227 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:24,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958218140] [2020-09-15 01:13:24,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288790534] [2020-09-15 01:13:24,228 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:24,286 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-15 01:13:24,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:13:24,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-15 01:13:24,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:24,306 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:24,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:24,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-15 01:13:24,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333050007] [2020-09-15 01:13:24,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:13:24,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:24,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:13:24,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:13:24,308 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 15 states. [2020-09-15 01:13:24,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:24,914 INFO L93 Difference]: Finished difference Result 95 states and 223 transitions. [2020-09-15 01:13:24,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-15 01:13:24,915 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-15 01:13:24,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:24,916 INFO L225 Difference]: With dead ends: 95 [2020-09-15 01:13:24,916 INFO L226 Difference]: Without dead ends: 89 [2020-09-15 01:13:24,917 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=382, Invalid=878, Unknown=0, NotChecked=0, Total=1260 [2020-09-15 01:13:24,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-15 01:13:24,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 65. [2020-09-15 01:13:24,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-15 01:13:24,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 163 transitions. [2020-09-15 01:13:24,920 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 163 transitions. Word has length 19 [2020-09-15 01:13:24,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:24,920 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 163 transitions. [2020-09-15 01:13:24,920 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:13:24,920 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 163 transitions. [2020-09-15 01:13:24,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-15 01:13:24,921 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:24,921 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:25,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-09-15 01:13:25,129 INFO L427 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:25,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:25,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1826418303, now seen corresponding path program 78 times [2020-09-15 01:13:25,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:25,131 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85911811] [2020-09-15 01:13:25,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:25,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:25,308 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:25,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85911811] [2020-09-15 01:13:25,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249458581] [2020-09-15 01:13:25,309 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:25,371 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-15 01:13:25,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:13:25,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-15 01:13:25,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:25,399 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:13:25,427 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:25,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:25,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-15 01:13:25,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868779923] [2020-09-15 01:13:25,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 01:13:25,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:25,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 01:13:25,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-09-15 01:13:25,429 INFO L87 Difference]: Start difference. First operand 65 states and 163 transitions. Second operand 16 states. [2020-09-15 01:13:26,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:26,191 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-09-15 01:13:26,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-15 01:13:26,192 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-15 01:13:26,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:26,193 INFO L225 Difference]: With dead ends: 92 [2020-09-15 01:13:26,193 INFO L226 Difference]: Without dead ends: 86 [2020-09-15 01:13:26,193 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=392, Invalid=940, Unknown=0, NotChecked=0, Total=1332 [2020-09-15 01:13:26,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-15 01:13:26,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 64. [2020-09-15 01:13:26,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-15 01:13:26,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-09-15 01:13:26,196 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 19 [2020-09-15 01:13:26,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:26,197 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-09-15 01:13:26,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 01:13:26,197 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-09-15 01:13:26,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-15 01:13:26,197 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:26,197 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:26,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:26,406 INFO L427 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:26,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:26,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1826908413, now seen corresponding path program 79 times [2020-09-15 01:13:26,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:26,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115657611] [2020-09-15 01:13:26,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:26,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:26,586 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:26,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115657611] [2020-09-15 01:13:26,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24652890] [2020-09-15 01:13:26,587 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:26,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:26,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-15 01:13:26,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:26,667 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:26,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:26,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-15 01:13:26,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851847753] [2020-09-15 01:13:26,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:13:26,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:26,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:13:26,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:13:26,669 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 15 states. [2020-09-15 01:13:27,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:27,323 INFO L93 Difference]: Finished difference Result 112 states and 267 transitions. [2020-09-15 01:13:27,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-15 01:13:27,324 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-15 01:13:27,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:27,325 INFO L225 Difference]: With dead ends: 112 [2020-09-15 01:13:27,325 INFO L226 Difference]: Without dead ends: 106 [2020-09-15 01:13:27,326 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=458, Invalid=948, Unknown=0, NotChecked=0, Total=1406 [2020-09-15 01:13:27,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-15 01:13:27,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 70. [2020-09-15 01:13:27,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-15 01:13:27,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 181 transitions. [2020-09-15 01:13:27,328 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 181 transitions. Word has length 19 [2020-09-15 01:13:27,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:27,329 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 181 transitions. [2020-09-15 01:13:27,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:13:27,329 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 181 transitions. [2020-09-15 01:13:27,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-15 01:13:27,333 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:27,335 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:27,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:27,540 INFO L427 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:27,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:27,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1826925153, now seen corresponding path program 80 times [2020-09-15 01:13:27,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:27,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891721761] [2020-09-15 01:13:27,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:27,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:27,698 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:27,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891721761] [2020-09-15 01:13:27,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167562720] [2020-09-15 01:13:27,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:27,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:13:27,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:13:27,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-15 01:13:27,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:27,808 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:27,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:27,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-15 01:13:27,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062439141] [2020-09-15 01:13:27,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 01:13:27,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:27,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 01:13:27,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-09-15 01:13:27,810 INFO L87 Difference]: Start difference. First operand 70 states and 181 transitions. Second operand 16 states. [2020-09-15 01:13:28,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:28,608 INFO L93 Difference]: Finished difference Result 93 states and 223 transitions. [2020-09-15 01:13:28,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-15 01:13:28,609 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-15 01:13:28,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:28,610 INFO L225 Difference]: With dead ends: 93 [2020-09-15 01:13:28,610 INFO L226 Difference]: Without dead ends: 85 [2020-09-15 01:13:28,611 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=436, Invalid=1046, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 01:13:28,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-15 01:13:28,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2020-09-15 01:13:28,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-15 01:13:28,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-09-15 01:13:28,612 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 19 [2020-09-15 01:13:28,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:28,612 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-09-15 01:13:28,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 01:13:28,613 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-09-15 01:13:28,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-15 01:13:28,613 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:28,613 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:28,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:28,821 INFO L427 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:28,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:28,822 INFO L82 PathProgramCache]: Analyzing trace with hash 846490750, now seen corresponding path program 81 times [2020-09-15 01:13:28,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:28,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656404162] [2020-09-15 01:13:28,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:28,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:29,061 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:29,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656404162] [2020-09-15 01:13:29,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572907724] [2020-09-15 01:13:29,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:29,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-15 01:13:29,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:13:29,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-15 01:13:29,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:29,140 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:29,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:29,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-15 01:13:29,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87676112] [2020-09-15 01:13:29,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 01:13:29,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:29,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 01:13:29,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-09-15 01:13:29,142 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 16 states. [2020-09-15 01:13:29,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:29,540 INFO L93 Difference]: Finished difference Result 104 states and 243 transitions. [2020-09-15 01:13:29,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-15 01:13:29,540 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-15 01:13:29,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:29,541 INFO L225 Difference]: With dead ends: 104 [2020-09-15 01:13:29,542 INFO L226 Difference]: Without dead ends: 98 [2020-09-15 01:13:29,542 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=247, Invalid=565, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:13:29,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-15 01:13:29,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 69. [2020-09-15 01:13:29,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-15 01:13:29,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-15 01:13:29,546 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-15 01:13:29,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:29,546 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-15 01:13:29,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 01:13:29,547 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-15 01:13:29,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-15 01:13:29,548 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:29,548 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:29,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:29,759 INFO L427 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:29,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:29,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1831682274, now seen corresponding path program 82 times [2020-09-15 01:13:29,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:29,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98810922] [2020-09-15 01:13:29,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:29,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:30,008 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:30,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98810922] [2020-09-15 01:13:30,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617048640] [2020-09-15 01:13:30,010 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:30,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:13:30,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:13:30,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-15 01:13:30,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:30,103 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:13:30,120 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:30,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:30,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-15 01:13:30,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658907972] [2020-09-15 01:13:30,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:13:30,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:30,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:13:30,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:13:30,122 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-15 01:13:30,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:30,630 INFO L93 Difference]: Finished difference Result 101 states and 237 transitions. [2020-09-15 01:13:30,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-15 01:13:30,631 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-15 01:13:30,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:30,632 INFO L225 Difference]: With dead ends: 101 [2020-09-15 01:13:30,632 INFO L226 Difference]: Without dead ends: 95 [2020-09-15 01:13:30,632 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=285, Invalid=707, Unknown=0, NotChecked=0, Total=992 [2020-09-15 01:13:30,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-15 01:13:30,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 68. [2020-09-15 01:13:30,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-15 01:13:30,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-15 01:13:30,634 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-15 01:13:30,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:30,635 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-15 01:13:30,635 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:13:30,635 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-15 01:13:30,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-15 01:13:30,635 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:30,636 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:30,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:30,845 INFO L427 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:30,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:30,845 INFO L82 PathProgramCache]: Analyzing trace with hash 214523232, now seen corresponding path program 83 times [2020-09-15 01:13:30,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:30,846 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247131322] [2020-09-15 01:13:30,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:30,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:31,065 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:31,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247131322] [2020-09-15 01:13:31,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591650734] [2020-09-15 01:13:31,066 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:31,126 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-15 01:13:31,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:13:31,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-15 01:13:31,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:31,143 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:31,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:31,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-15 01:13:31,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511895753] [2020-09-15 01:13:31,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 01:13:31,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:31,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 01:13:31,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-09-15 01:13:31,145 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-15 01:13:31,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:31,611 INFO L93 Difference]: Finished difference Result 98 states and 231 transitions. [2020-09-15 01:13:31,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-15 01:13:31,612 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-15 01:13:31,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:31,613 INFO L225 Difference]: With dead ends: 98 [2020-09-15 01:13:31,613 INFO L226 Difference]: Without dead ends: 92 [2020-09-15 01:13:31,613 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=260, Invalid=670, Unknown=0, NotChecked=0, Total=930 [2020-09-15 01:13:31,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-15 01:13:31,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 69. [2020-09-15 01:13:31,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-15 01:13:31,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-15 01:13:31,617 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-15 01:13:31,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:31,617 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-15 01:13:31,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 01:13:31,617 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-15 01:13:31,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-15 01:13:31,618 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:31,618 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:31,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:31,819 INFO L427 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:31,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:31,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1471412932, now seen corresponding path program 84 times [2020-09-15 01:13:31,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:31,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344832484] [2020-09-15 01:13:31,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:31,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:32,047 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:32,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344832484] [2020-09-15 01:13:32,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883888623] [2020-09-15 01:13:32,048 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:32,113 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-15 01:13:32,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:13:32,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-15 01:13:32,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:32,147 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:13:32,161 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:32,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:32,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-15 01:13:32,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146967090] [2020-09-15 01:13:32,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:13:32,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:32,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:13:32,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:13:32,162 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-15 01:13:32,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:32,773 INFO L93 Difference]: Finished difference Result 97 states and 229 transitions. [2020-09-15 01:13:32,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-15 01:13:32,774 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-15 01:13:32,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:32,775 INFO L225 Difference]: With dead ends: 97 [2020-09-15 01:13:32,776 INFO L226 Difference]: Without dead ends: 91 [2020-09-15 01:13:32,776 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2020-09-15 01:13:32,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-15 01:13:32,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2020-09-15 01:13:32,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-15 01:13:32,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-15 01:13:32,779 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-15 01:13:32,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:32,779 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-15 01:13:32,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:13:32,780 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-15 01:13:32,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-15 01:13:32,780 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:32,780 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:32,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:32,985 INFO L427 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:32,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:32,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1207361854, now seen corresponding path program 85 times [2020-09-15 01:13:32,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:32,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490413493] [2020-09-15 01:13:32,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:32,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:33,199 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:33,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490413493] [2020-09-15 01:13:33,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535716994] [2020-09-15 01:13:33,200 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:33,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:33,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-15 01:13:33,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:33,281 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:33,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:33,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-15 01:13:33,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109525278] [2020-09-15 01:13:33,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 01:13:33,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:33,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 01:13:33,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-09-15 01:13:33,283 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-15 01:13:33,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:33,808 INFO L93 Difference]: Finished difference Result 94 states and 223 transitions. [2020-09-15 01:13:33,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-15 01:13:33,809 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-15 01:13:33,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:33,810 INFO L225 Difference]: With dead ends: 94 [2020-09-15 01:13:33,810 INFO L226 Difference]: Without dead ends: 88 [2020-09-15 01:13:33,811 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=289, Invalid=767, Unknown=0, NotChecked=0, Total=1056 [2020-09-15 01:13:33,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-15 01:13:33,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 69. [2020-09-15 01:13:33,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-15 01:13:33,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-15 01:13:33,813 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-15 01:13:33,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:33,813 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-15 01:13:33,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 01:13:33,813 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-15 01:13:33,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-15 01:13:33,814 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:33,814 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:34,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2020-09-15 01:13:34,017 INFO L427 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:34,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:34,018 INFO L82 PathProgramCache]: Analyzing trace with hash -687618778, now seen corresponding path program 86 times [2020-09-15 01:13:34,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:34,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574390014] [2020-09-15 01:13:34,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:34,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:34,242 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:34,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574390014] [2020-09-15 01:13:34,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605926306] [2020-09-15 01:13:34,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:34,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:13:34,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:13:34,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-15 01:13:34,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:34,341 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:13:34,359 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:34,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:34,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-15 01:13:34,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306779940] [2020-09-15 01:13:34,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:13:34,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:34,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:13:34,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:13:34,361 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-15 01:13:35,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:35,078 INFO L93 Difference]: Finished difference Result 93 states and 221 transitions. [2020-09-15 01:13:35,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-15 01:13:35,079 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-15 01:13:35,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:35,080 INFO L225 Difference]: With dead ends: 93 [2020-09-15 01:13:35,080 INFO L226 Difference]: Without dead ends: 87 [2020-09-15 01:13:35,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260 [2020-09-15 01:13:35,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-15 01:13:35,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 68. [2020-09-15 01:13:35,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-15 01:13:35,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-15 01:13:35,083 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-15 01:13:35,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:35,083 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-15 01:13:35,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:13:35,084 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-15 01:13:35,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-15 01:13:35,084 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:35,084 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:35,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:35,285 INFO L427 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:35,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:35,286 INFO L82 PathProgramCache]: Analyzing trace with hash 967692452, now seen corresponding path program 87 times [2020-09-15 01:13:35,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:35,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564608232] [2020-09-15 01:13:35,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:35,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:35,493 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:35,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564608232] [2020-09-15 01:13:35,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562463028] [2020-09-15 01:13:35,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:35,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-15 01:13:35,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:13:35,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-15 01:13:35,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:35,581 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:35,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:35,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-15 01:13:35,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611936630] [2020-09-15 01:13:35,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 01:13:35,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:35,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 01:13:35,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-09-15 01:13:35,583 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-15 01:13:36,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:36,157 INFO L93 Difference]: Finished difference Result 90 states and 215 transitions. [2020-09-15 01:13:36,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-15 01:13:36,158 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-15 01:13:36,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:36,159 INFO L225 Difference]: With dead ends: 90 [2020-09-15 01:13:36,159 INFO L226 Difference]: Without dead ends: 84 [2020-09-15 01:13:36,159 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=334, Invalid=856, Unknown=0, NotChecked=0, Total=1190 [2020-09-15 01:13:36,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-15 01:13:36,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 69. [2020-09-15 01:13:36,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-15 01:13:36,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-15 01:13:36,161 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-15 01:13:36,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:36,162 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-15 01:13:36,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 01:13:36,162 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-15 01:13:36,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-15 01:13:36,162 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:36,162 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:36,363 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-09-15 01:13:36,363 INFO L427 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:36,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:36,364 INFO L82 PathProgramCache]: Analyzing trace with hash -752435192, now seen corresponding path program 88 times [2020-09-15 01:13:36,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:36,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242502391] [2020-09-15 01:13:36,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:36,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:36,572 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:36,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242502391] [2020-09-15 01:13:36,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207188419] [2020-09-15 01:13:36,573 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:36,633 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:13:36,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:13:36,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-15 01:13:36,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:36,662 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:13:36,679 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:36,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:36,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-15 01:13:36,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015897759] [2020-09-15 01:13:36,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:13:36,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:36,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:13:36,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:13:36,681 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-15 01:13:37,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:37,505 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-09-15 01:13:37,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-15 01:13:37,506 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-15 01:13:37,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:37,507 INFO L225 Difference]: With dead ends: 89 [2020-09-15 01:13:37,507 INFO L226 Difference]: Without dead ends: 83 [2020-09-15 01:13:37,507 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=393, Invalid=1013, Unknown=0, NotChecked=0, Total=1406 [2020-09-15 01:13:37,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-15 01:13:37,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2020-09-15 01:13:37,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-15 01:13:37,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-15 01:13:37,510 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-15 01:13:37,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:37,510 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-15 01:13:37,510 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:13:37,511 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-15 01:13:37,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-15 01:13:37,511 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:37,511 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:37,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:37,721 INFO L427 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:37,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:37,722 INFO L82 PathProgramCache]: Analyzing trace with hash -281439482, now seen corresponding path program 89 times [2020-09-15 01:13:37,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:37,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108464579] [2020-09-15 01:13:37,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:37,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:37,923 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:37,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108464579] [2020-09-15 01:13:37,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708385888] [2020-09-15 01:13:37,923 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:37,986 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-15 01:13:37,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:13:37,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-15 01:13:37,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:38,007 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:38,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:38,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-15 01:13:38,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141530386] [2020-09-15 01:13:38,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 01:13:38,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:38,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 01:13:38,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-09-15 01:13:38,009 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-15 01:13:38,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:38,710 INFO L93 Difference]: Finished difference Result 86 states and 207 transitions. [2020-09-15 01:13:38,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-15 01:13:38,712 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-15 01:13:38,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:38,713 INFO L225 Difference]: With dead ends: 86 [2020-09-15 01:13:38,713 INFO L226 Difference]: Without dead ends: 80 [2020-09-15 01:13:38,713 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=395, Invalid=937, Unknown=0, NotChecked=0, Total=1332 [2020-09-15 01:13:38,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-15 01:13:38,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 69. [2020-09-15 01:13:38,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-15 01:13:38,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-15 01:13:38,716 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-15 01:13:38,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:38,716 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-15 01:13:38,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 01:13:38,716 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-15 01:13:38,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-15 01:13:38,717 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:38,718 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:38,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:38,928 INFO L427 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:38,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:38,929 INFO L82 PathProgramCache]: Analyzing trace with hash -265352342, now seen corresponding path program 90 times [2020-09-15 01:13:38,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:38,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599550664] [2020-09-15 01:13:38,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:38,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:39,138 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:39,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599550664] [2020-09-15 01:13:39,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705128597] [2020-09-15 01:13:39,139 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:39,204 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-15 01:13:39,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:13:39,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-15 01:13:39,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:39,234 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:13:39,253 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:39,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:39,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-15 01:13:39,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863532188] [2020-09-15 01:13:39,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:13:39,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:39,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:13:39,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:13:39,255 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-15 01:13:40,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:40,217 INFO L93 Difference]: Finished difference Result 85 states and 205 transitions. [2020-09-15 01:13:40,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-15 01:13:40,217 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-15 01:13:40,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:40,218 INFO L225 Difference]: With dead ends: 85 [2020-09-15 01:13:40,218 INFO L226 Difference]: Without dead ends: 79 [2020-09-15 01:13:40,219 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=461, Invalid=1099, Unknown=0, NotChecked=0, Total=1560 [2020-09-15 01:13:40,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-15 01:13:40,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2020-09-15 01:13:40,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-15 01:13:40,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-15 01:13:40,221 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-15 01:13:40,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:40,221 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-15 01:13:40,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:13:40,222 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-15 01:13:40,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-15 01:13:40,222 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:40,222 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:40,430 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:40,431 INFO L427 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:40,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:40,432 INFO L82 PathProgramCache]: Analyzing trace with hash -264862232, now seen corresponding path program 91 times [2020-09-15 01:13:40,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:40,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049834842] [2020-09-15 01:13:40,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:40,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:40,634 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:40,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049834842] [2020-09-15 01:13:40,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204404385] [2020-09-15 01:13:40,635 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:40,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:40,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-15 01:13:40,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:40,734 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:40,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:40,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-15 01:13:40,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090067186] [2020-09-15 01:13:40,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 01:13:40,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:40,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 01:13:40,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-09-15 01:13:40,736 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-15 01:13:41,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:41,528 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-09-15 01:13:41,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-15 01:13:41,529 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-15 01:13:41,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:41,530 INFO L225 Difference]: With dead ends: 101 [2020-09-15 01:13:41,530 INFO L226 Difference]: Without dead ends: 95 [2020-09-15 01:13:41,531 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=472, Invalid=1010, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 01:13:41,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-15 01:13:41,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 72. [2020-09-15 01:13:41,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-15 01:13:41,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 185 transitions. [2020-09-15 01:13:41,534 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 185 transitions. Word has length 20 [2020-09-15 01:13:41,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:41,534 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 185 transitions. [2020-09-15 01:13:41,534 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 01:13:41,534 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 185 transitions. [2020-09-15 01:13:41,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-15 01:13:41,535 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:41,535 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:41,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:41,745 INFO L427 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:41,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:41,746 INFO L82 PathProgramCache]: Analyzing trace with hash -264845492, now seen corresponding path program 92 times [2020-09-15 01:13:41,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:41,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684191474] [2020-09-15 01:13:41,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:41,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:41,923 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:41,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684191474] [2020-09-15 01:13:41,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217111618] [2020-09-15 01:13:41,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:41,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:13:41,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:13:41,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-15 01:13:41,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:42,010 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:13:42,024 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:42,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:42,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-15 01:13:42,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779820481] [2020-09-15 01:13:42,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:13:42,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:42,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:13:42,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:13:42,027 INFO L87 Difference]: Start difference. First operand 72 states and 185 transitions. Second operand 17 states. [2020-09-15 01:13:43,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:43,025 INFO L93 Difference]: Finished difference Result 82 states and 201 transitions. [2020-09-15 01:13:43,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 01:13:43,026 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-15 01:13:43,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:43,027 INFO L225 Difference]: With dead ends: 82 [2020-09-15 01:13:43,027 INFO L226 Difference]: Without dead ends: 74 [2020-09-15 01:13:43,028 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=545, Invalid=1177, Unknown=0, NotChecked=0, Total=1722 [2020-09-15 01:13:43,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-09-15 01:13:43,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 53. [2020-09-15 01:13:43,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-15 01:13:43,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 128 transitions. [2020-09-15 01:13:43,030 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 128 transitions. Word has length 20 [2020-09-15 01:13:43,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:43,030 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 128 transitions. [2020-09-15 01:13:43,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:13:43,030 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 128 transitions. [2020-09-15 01:13:43,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-15 01:13:43,033 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:43,033 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:43,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:43,242 INFO L427 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:43,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:43,243 INFO L82 PathProgramCache]: Analyzing trace with hash 800121202, now seen corresponding path program 93 times [2020-09-15 01:13:43,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:43,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291498358] [2020-09-15 01:13:43,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:43,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:43,438 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:43,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291498358] [2020-09-15 01:13:43,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453497352] [2020-09-15 01:13:43,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:43,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-15 01:13:43,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:13:43,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-15 01:13:43,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:43,533 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:13:43,553 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:43,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:43,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-15 01:13:43,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642810863] [2020-09-15 01:13:43,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:13:43,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:43,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:13:43,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:13:43,556 INFO L87 Difference]: Start difference. First operand 53 states and 128 transitions. Second operand 17 states. [2020-09-15 01:13:44,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:44,440 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-09-15 01:13:44,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-15 01:13:44,441 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-15 01:13:44,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:44,442 INFO L225 Difference]: With dead ends: 92 [2020-09-15 01:13:44,442 INFO L226 Difference]: Without dead ends: 87 [2020-09-15 01:13:44,443 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=574, Invalid=1148, Unknown=0, NotChecked=0, Total=1722 [2020-09-15 01:13:44,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-15 01:13:44,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 70. [2020-09-15 01:13:44,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-15 01:13:44,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-09-15 01:13:44,445 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 20 [2020-09-15 01:13:44,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:44,446 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-09-15 01:13:44,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:13:44,446 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-09-15 01:13:44,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 01:13:44,446 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:44,447 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:44,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:44,649 INFO L427 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:44,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:44,649 INFO L82 PathProgramCache]: Analyzing trace with hash 379740647, now seen corresponding path program 94 times [2020-09-15 01:13:44,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:44,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377825673] [2020-09-15 01:13:44,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:44,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:44,877 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:44,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377825673] [2020-09-15 01:13:44,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559018879] [2020-09-15 01:13:44,878 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:44,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:13:44,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:13:44,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-15 01:13:44,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:44,984 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:13:45,009 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:45,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:45,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-15 01:13:45,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547737284] [2020-09-15 01:13:45,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-15 01:13:45,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:45,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-15 01:13:45,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:13:45,012 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 18 states. [2020-09-15 01:13:45,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:45,998 INFO L93 Difference]: Finished difference Result 78 states and 197 transitions. [2020-09-15 01:13:45,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-15 01:13:45,999 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-15 01:13:46,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:46,000 INFO L225 Difference]: With dead ends: 78 [2020-09-15 01:13:46,001 INFO L226 Difference]: Without dead ends: 73 [2020-09-15 01:13:46,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=589, Invalid=1217, Unknown=0, NotChecked=0, Total=1806 [2020-09-15 01:13:46,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-15 01:13:46,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54. [2020-09-15 01:13:46,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-15 01:13:46,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-09-15 01:13:46,003 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 21 [2020-09-15 01:13:46,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:46,003 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-09-15 01:13:46,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-15 01:13:46,004 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-09-15 01:13:46,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 01:13:46,004 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:46,004 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:46,204 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2020-09-15 01:13:46,205 INFO L427 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:46,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:46,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1875703058, now seen corresponding path program 95 times [2020-09-15 01:13:46,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:46,205 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428021952] [2020-09-15 01:13:46,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:46,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:46,483 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:46,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428021952] [2020-09-15 01:13:46,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874161753] [2020-09-15 01:13:46,484 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:46,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-15 01:13:46,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:13:46,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-15 01:13:46,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:46,566 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:46,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:46,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-15 01:13:46,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705661437] [2020-09-15 01:13:46,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:13:46,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:46,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:13:46,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:13:46,568 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 17 states. [2020-09-15 01:13:46,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:46,995 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-09-15 01:13:46,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-15 01:13:46,996 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-15 01:13:46,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:46,997 INFO L225 Difference]: With dead ends: 84 [2020-09-15 01:13:46,997 INFO L226 Difference]: Without dead ends: 78 [2020-09-15 01:13:46,998 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2020-09-15 01:13:46,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-15 01:13:47,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2020-09-15 01:13:47,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-15 01:13:47,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 151 transitions. [2020-09-15 01:13:47,001 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 151 transitions. Word has length 21 [2020-09-15 01:13:47,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:47,001 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 151 transitions. [2020-09-15 01:13:47,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:13:47,001 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 151 transitions. [2020-09-15 01:13:47,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 01:13:47,001 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:47,001 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:47,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:47,202 INFO L427 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:47,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:47,203 INFO L82 PathProgramCache]: Analyzing trace with hash -543014794, now seen corresponding path program 96 times [2020-09-15 01:13:47,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:47,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939283309] [2020-09-15 01:13:47,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:47,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:47,484 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:47,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939283309] [2020-09-15 01:13:47,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397872840] [2020-09-15 01:13:47,485 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:47,551 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-15 01:13:47,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:13:47,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-15 01:13:47,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:47,588 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:13:47,601 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:47,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:47,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-15 01:13:47,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040484944] [2020-09-15 01:13:47,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-15 01:13:47,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:47,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-15 01:13:47,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:13:47,603 INFO L87 Difference]: Start difference. First operand 62 states and 151 transitions. Second operand 18 states. [2020-09-15 01:13:48,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:48,111 INFO L93 Difference]: Finished difference Result 98 states and 223 transitions. [2020-09-15 01:13:48,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-15 01:13:48,112 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-15 01:13:48,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:48,113 INFO L225 Difference]: With dead ends: 98 [2020-09-15 01:13:48,113 INFO L226 Difference]: Without dead ends: 92 [2020-09-15 01:13:48,113 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=292, Invalid=700, Unknown=0, NotChecked=0, Total=992 [2020-09-15 01:13:48,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-15 01:13:48,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-09-15 01:13:48,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-15 01:13:48,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 147 transitions. [2020-09-15 01:13:48,115 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 147 transitions. Word has length 21 [2020-09-15 01:13:48,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:48,116 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 147 transitions. [2020-09-15 01:13:48,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-15 01:13:48,116 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 147 transitions. [2020-09-15 01:13:48,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 01:13:48,116 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:48,116 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:48,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2020-09-15 01:13:48,317 INFO L427 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:48,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:48,318 INFO L82 PathProgramCache]: Analyzing trace with hash 145306996, now seen corresponding path program 97 times [2020-09-15 01:13:48,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:48,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304472857] [2020-09-15 01:13:48,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:48,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:48,594 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:48,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304472857] [2020-09-15 01:13:48,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841734476] [2020-09-15 01:13:48,595 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:48,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:48,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-15 01:13:48,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:48,670 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:48,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:48,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-15 01:13:48,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850935979] [2020-09-15 01:13:48,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:13:48,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:48,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:13:48,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:13:48,671 INFO L87 Difference]: Start difference. First operand 60 states and 147 transitions. Second operand 17 states. [2020-09-15 01:13:49,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:49,205 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-09-15 01:13:49,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-15 01:13:49,206 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-15 01:13:49,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:49,207 INFO L225 Difference]: With dead ends: 99 [2020-09-15 01:13:49,207 INFO L226 Difference]: Without dead ends: 93 [2020-09-15 01:13:49,208 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=298, Invalid=758, Unknown=0, NotChecked=0, Total=1056 [2020-09-15 01:13:49,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-15 01:13:49,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 63. [2020-09-15 01:13:49,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-15 01:13:49,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 155 transitions. [2020-09-15 01:13:49,211 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 155 transitions. Word has length 21 [2020-09-15 01:13:49,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:49,211 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 155 transitions. [2020-09-15 01:13:49,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:13:49,211 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 155 transitions. [2020-09-15 01:13:49,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 01:13:49,212 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:49,212 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:49,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:49,413 INFO L427 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:49,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:49,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1130498520, now seen corresponding path program 98 times [2020-09-15 01:13:49,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:49,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822556882] [2020-09-15 01:13:49,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:49,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:49,692 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:49,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822556882] [2020-09-15 01:13:49,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992000046] [2020-09-15 01:13:49,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:49,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:13:49,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:13:49,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-15 01:13:49,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:49,785 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:13:49,799 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:49,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:49,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-15 01:13:49,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060965669] [2020-09-15 01:13:49,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-15 01:13:49,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:49,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-15 01:13:49,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:13:49,802 INFO L87 Difference]: Start difference. First operand 63 states and 155 transitions. Second operand 18 states. [2020-09-15 01:13:50,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:50,407 INFO L93 Difference]: Finished difference Result 109 states and 247 transitions. [2020-09-15 01:13:50,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-15 01:13:50,408 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-15 01:13:50,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:50,409 INFO L225 Difference]: With dead ends: 109 [2020-09-15 01:13:50,409 INFO L226 Difference]: Without dead ends: 103 [2020-09-15 01:13:50,409 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=328, Invalid=862, Unknown=0, NotChecked=0, Total=1190 [2020-09-15 01:13:50,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-15 01:13:50,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 62. [2020-09-15 01:13:50,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-15 01:13:50,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 153 transitions. [2020-09-15 01:13:50,412 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 153 transitions. Word has length 21 [2020-09-15 01:13:50,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:50,412 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 153 transitions. [2020-09-15 01:13:50,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-15 01:13:50,413 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 153 transitions. [2020-09-15 01:13:50,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 01:13:50,413 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:50,414 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:50,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:50,622 INFO L427 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:50,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:50,623 INFO L82 PathProgramCache]: Analyzing trace with hash -486660522, now seen corresponding path program 99 times [2020-09-15 01:13:50,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:50,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323526496] [2020-09-15 01:13:50,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:50,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:50,884 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:50,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323526496] [2020-09-15 01:13:50,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607364413] [2020-09-15 01:13:50,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:50,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-15 01:13:50,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:13:50,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-15 01:13:50,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:50,967 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:50,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:50,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-15 01:13:50,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854912719] [2020-09-15 01:13:50,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:13:50,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:50,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:13:50,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:13:50,968 INFO L87 Difference]: Start difference. First operand 62 states and 153 transitions. Second operand 17 states. [2020-09-15 01:13:51,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:51,538 INFO L93 Difference]: Finished difference Result 109 states and 249 transitions. [2020-09-15 01:13:51,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-15 01:13:51,539 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-15 01:13:51,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:51,540 INFO L225 Difference]: With dead ends: 109 [2020-09-15 01:13:51,540 INFO L226 Difference]: Without dead ends: 103 [2020-09-15 01:13:51,541 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=348, Invalid=912, Unknown=0, NotChecked=0, Total=1260 [2020-09-15 01:13:51,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-15 01:13:51,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 65. [2020-09-15 01:13:51,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-15 01:13:51,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 161 transitions. [2020-09-15 01:13:51,544 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 161 transitions. Word has length 21 [2020-09-15 01:13:51,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:51,544 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 161 transitions. [2020-09-15 01:13:51,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:13:51,544 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 161 transitions. [2020-09-15 01:13:51,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 01:13:51,545 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:51,545 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:51,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-09-15 01:13:51,749 INFO L427 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:51,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:51,750 INFO L82 PathProgramCache]: Analyzing trace with hash 770229178, now seen corresponding path program 100 times [2020-09-15 01:13:51,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:51,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853912228] [2020-09-15 01:13:51,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:51,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:52,024 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:52,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853912228] [2020-09-15 01:13:52,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602234295] [2020-09-15 01:13:52,026 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:52,094 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:13:52,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:13:52,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-15 01:13:52,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:52,119 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:13:52,137 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:52,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:52,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-15 01:13:52,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828143227] [2020-09-15 01:13:52,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-15 01:13:52,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:52,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-15 01:13:52,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:13:52,139 INFO L87 Difference]: Start difference. First operand 65 states and 161 transitions. Second operand 18 states. [2020-09-15 01:13:52,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:52,953 INFO L93 Difference]: Finished difference Result 106 states and 243 transitions. [2020-09-15 01:13:52,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-15 01:13:52,954 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-15 01:13:52,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:52,956 INFO L225 Difference]: With dead ends: 106 [2020-09-15 01:13:52,956 INFO L226 Difference]: Without dead ends: 100 [2020-09-15 01:13:52,957 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=355, Invalid=977, Unknown=0, NotChecked=0, Total=1332 [2020-09-15 01:13:52,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-15 01:13:52,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-09-15 01:13:52,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-15 01:13:52,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-09-15 01:13:52,961 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 21 [2020-09-15 01:13:52,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:52,961 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-09-15 01:13:52,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-15 01:13:52,962 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-09-15 01:13:52,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 01:13:52,963 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:52,963 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:53,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-09-15 01:13:53,164 INFO L427 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:53,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:53,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1908545608, now seen corresponding path program 101 times [2020-09-15 01:13:53,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:53,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421934127] [2020-09-15 01:13:53,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:53,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:53,385 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:53,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421934127] [2020-09-15 01:13:53,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053804371] [2020-09-15 01:13:53,385 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:53,448 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-15 01:13:53,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:13:53,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-15 01:13:53,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:53,468 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:53,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:53,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-15 01:13:53,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092391239] [2020-09-15 01:13:53,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:13:53,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:53,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:13:53,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:13:53,470 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 17 states. [2020-09-15 01:13:54,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:54,098 INFO L93 Difference]: Finished difference Result 107 states and 247 transitions. [2020-09-15 01:13:54,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-15 01:13:54,099 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-15 01:13:54,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:54,100 INFO L225 Difference]: With dead ends: 107 [2020-09-15 01:13:54,100 INFO L226 Difference]: Without dead ends: 101 [2020-09-15 01:13:54,100 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=390, Invalid=1016, Unknown=0, NotChecked=0, Total=1406 [2020-09-15 01:13:54,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-15 01:13:54,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-09-15 01:13:54,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-15 01:13:54,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 167 transitions. [2020-09-15 01:13:54,103 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 167 transitions. Word has length 21 [2020-09-15 01:13:54,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:54,103 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 167 transitions. [2020-09-15 01:13:54,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:13:54,103 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 167 transitions. [2020-09-15 01:13:54,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 01:13:54,104 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:54,104 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:54,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:54,311 INFO L427 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:54,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:54,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1388802532, now seen corresponding path program 102 times [2020-09-15 01:13:54,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:54,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709154422] [2020-09-15 01:13:54,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:54,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:54,556 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:54,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709154422] [2020-09-15 01:13:54,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131336502] [2020-09-15 01:13:54,557 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:54,624 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-15 01:13:54,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:13:54,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-15 01:13:54,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:54,654 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:13:54,670 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:54,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:54,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-15 01:13:54,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786123942] [2020-09-15 01:13:54,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-15 01:13:54,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:54,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-15 01:13:54,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:13:54,671 INFO L87 Difference]: Start difference. First operand 67 states and 167 transitions. Second operand 18 states. [2020-09-15 01:13:55,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:55,478 INFO L93 Difference]: Finished difference Result 104 states and 241 transitions. [2020-09-15 01:13:55,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-15 01:13:55,478 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-15 01:13:55,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:55,480 INFO L225 Difference]: With dead ends: 104 [2020-09-15 01:13:55,480 INFO L226 Difference]: Without dead ends: 98 [2020-09-15 01:13:55,480 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=398, Invalid=1084, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 01:13:55,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-15 01:13:55,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 66. [2020-09-15 01:13:55,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-15 01:13:55,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 165 transitions. [2020-09-15 01:13:55,483 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 165 transitions. Word has length 21 [2020-09-15 01:13:55,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:55,484 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 165 transitions. [2020-09-15 01:13:55,484 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-15 01:13:55,484 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 165 transitions. [2020-09-15 01:13:55,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 01:13:55,484 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:55,484 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:55,693 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-09-15 01:13:55,693 INFO L427 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:55,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:55,694 INFO L82 PathProgramCache]: Analyzing trace with hash 266508698, now seen corresponding path program 103 times [2020-09-15 01:13:55,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:55,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882674256] [2020-09-15 01:13:55,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:55,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:55,992 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:55,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882674256] [2020-09-15 01:13:55,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823180361] [2020-09-15 01:13:55,993 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:56,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:56,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-15 01:13:56,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:56,110 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:56,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:56,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-15 01:13:56,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391921218] [2020-09-15 01:13:56,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:13:56,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:56,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:13:56,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:13:56,113 INFO L87 Difference]: Start difference. First operand 66 states and 165 transitions. Second operand 17 states. [2020-09-15 01:13:56,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:56,894 INFO L93 Difference]: Finished difference Result 105 states and 245 transitions. [2020-09-15 01:13:56,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-15 01:13:56,895 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-15 01:13:56,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:56,896 INFO L225 Difference]: With dead ends: 105 [2020-09-15 01:13:56,896 INFO L226 Difference]: Without dead ends: 99 [2020-09-15 01:13:56,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=448, Invalid=1112, Unknown=0, NotChecked=0, Total=1560 [2020-09-15 01:13:56,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-15 01:13:56,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 69. [2020-09-15 01:13:56,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-15 01:13:56,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-15 01:13:56,899 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 21 [2020-09-15 01:13:56,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:56,900 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-15 01:13:56,900 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:13:56,900 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-15 01:13:56,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 01:13:56,900 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:56,901 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:57,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:57,104 INFO L427 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:57,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:57,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1453618946, now seen corresponding path program 104 times [2020-09-15 01:13:57,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:57,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156882752] [2020-09-15 01:13:57,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:57,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:57,330 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:57,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156882752] [2020-09-15 01:13:57,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963474816] [2020-09-15 01:13:57,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:57,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:13:57,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:13:57,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-15 01:13:57,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:57,421 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:13:57,438 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:57,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:57,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-15 01:13:57,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818207223] [2020-09-15 01:13:57,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-15 01:13:57,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:57,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-15 01:13:57,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:13:57,439 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 18 states. [2020-09-15 01:13:58,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:58,340 INFO L93 Difference]: Finished difference Result 102 states and 239 transitions. [2020-09-15 01:13:58,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-15 01:13:58,341 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-15 01:13:58,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:58,342 INFO L225 Difference]: With dead ends: 102 [2020-09-15 01:13:58,342 INFO L226 Difference]: Without dead ends: 96 [2020-09-15 01:13:58,342 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=457, Invalid=1183, Unknown=0, NotChecked=0, Total=1640 [2020-09-15 01:13:58,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-15 01:13:58,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 68. [2020-09-15 01:13:58,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-15 01:13:58,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-15 01:13:58,345 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 21 [2020-09-15 01:13:58,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:58,345 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-15 01:13:58,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-15 01:13:58,345 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-15 01:13:58,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 01:13:58,346 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:58,346 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:58,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2020-09-15 01:13:58,554 INFO L427 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:58,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:58,555 INFO L82 PathProgramCache]: Analyzing trace with hash -982623236, now seen corresponding path program 105 times [2020-09-15 01:13:58,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:58,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836373458] [2020-09-15 01:13:58,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:58,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:58,780 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:58,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836373458] [2020-09-15 01:13:58,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721876897] [2020-09-15 01:13:58,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:58,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-15 01:13:58,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:13:58,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-15 01:13:58,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:58,867 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:58,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:58,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-15 01:13:58,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362149840] [2020-09-15 01:13:58,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:13:58,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:58,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:13:58,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:13:58,868 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 17 states. [2020-09-15 01:13:59,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:59,665 INFO L93 Difference]: Finished difference Result 103 states and 243 transitions. [2020-09-15 01:13:59,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-15 01:13:59,666 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-15 01:13:59,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:59,667 INFO L225 Difference]: With dead ends: 103 [2020-09-15 01:13:59,667 INFO L226 Difference]: Without dead ends: 97 [2020-09-15 01:13:59,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=522, Invalid=1200, Unknown=0, NotChecked=0, Total=1722 [2020-09-15 01:13:59,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-15 01:13:59,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 71. [2020-09-15 01:13:59,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-15 01:13:59,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 179 transitions. [2020-09-15 01:13:59,669 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 179 transitions. Word has length 21 [2020-09-15 01:13:59,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:59,669 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 179 transitions. [2020-09-15 01:13:59,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:13:59,669 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 179 transitions. [2020-09-15 01:13:59,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 01:13:59,670 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:59,670 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:59,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:59,871 INFO L427 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:59,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:59,872 INFO L82 PathProgramCache]: Analyzing trace with hash -966536096, now seen corresponding path program 106 times [2020-09-15 01:13:59,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:59,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895762419] [2020-09-15 01:13:59,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:59,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:00,090 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:00,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895762419] [2020-09-15 01:14:00,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137266846] [2020-09-15 01:14:00,091 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:00,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:14:00,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:14:00,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-15 01:14:00,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:14:00,180 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:14:00,198 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:00,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:14:00,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-15 01:14:00,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179064747] [2020-09-15 01:14:00,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-15 01:14:00,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:14:00,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-15 01:14:00,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:14:00,200 INFO L87 Difference]: Start difference. First operand 71 states and 179 transitions. Second operand 18 states. [2020-09-15 01:14:01,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:14:01,229 INFO L93 Difference]: Finished difference Result 100 states and 237 transitions. [2020-09-15 01:14:01,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 01:14:01,230 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-15 01:14:01,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:14:01,231 INFO L225 Difference]: With dead ends: 100 [2020-09-15 01:14:01,231 INFO L226 Difference]: Without dead ends: 94 [2020-09-15 01:14:01,231 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=532, Invalid=1274, Unknown=0, NotChecked=0, Total=1806 [2020-09-15 01:14:01,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-15 01:14:01,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 70. [2020-09-15 01:14:01,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-15 01:14:01,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-09-15 01:14:01,233 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 21 [2020-09-15 01:14:01,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:14:01,233 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-09-15 01:14:01,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-15 01:14:01,233 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-09-15 01:14:01,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 01:14:01,234 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:14:01,234 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:14:01,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-09-15 01:14:01,435 INFO L427 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:14:01,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:14:01,436 INFO L82 PathProgramCache]: Analyzing trace with hash -966045986, now seen corresponding path program 107 times [2020-09-15 01:14:01,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:14:01,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117975742] [2020-09-15 01:14:01,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:14:01,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:01,644 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:01,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117975742] [2020-09-15 01:14:01,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597271837] [2020-09-15 01:14:01,645 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:01,727 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-15 01:14:01,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:14:01,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-15 01:14:01,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:14:01,766 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:01,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:14:01,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-15 01:14:01,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311087668] [2020-09-15 01:14:01,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:14:01,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:14:01,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:14:01,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:14:01,769 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 17 states. [2020-09-15 01:14:02,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:14:02,630 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-09-15 01:14:02,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-15 01:14:02,631 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-15 01:14:02,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:14:02,631 INFO L225 Difference]: With dead ends: 120 [2020-09-15 01:14:02,632 INFO L226 Difference]: Without dead ends: 114 [2020-09-15 01:14:02,632 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=612, Invalid=1280, Unknown=0, NotChecked=0, Total=1892 [2020-09-15 01:14:02,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-15 01:14:02,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 76. [2020-09-15 01:14:02,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-15 01:14:02,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2020-09-15 01:14:02,635 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 21 [2020-09-15 01:14:02,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:14:02,635 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2020-09-15 01:14:02,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:14:02,636 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2020-09-15 01:14:02,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 01:14:02,636 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:14:02,636 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:14:02,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-09-15 01:14:02,837 INFO L427 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:14:02,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:14:02,838 INFO L82 PathProgramCache]: Analyzing trace with hash -966029246, now seen corresponding path program 108 times [2020-09-15 01:14:02,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:14:02,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79992013] [2020-09-15 01:14:02,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:14:02,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:03,124 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:03,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79992013] [2020-09-15 01:14:03,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911580437] [2020-09-15 01:14:03,125 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:03,205 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-15 01:14:03,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:14:03,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-15 01:14:03,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:14:03,247 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:14:03,271 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:03,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:14:03,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-15 01:14:03,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163225651] [2020-09-15 01:14:03,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-15 01:14:03,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:14:03,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-15 01:14:03,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:14:03,274 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand 18 states. [2020-09-15 01:14:04,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:14:04,334 INFO L93 Difference]: Finished difference Result 101 states and 243 transitions. [2020-09-15 01:14:04,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 01:14:04,336 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-15 01:14:04,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:14:04,337 INFO L225 Difference]: With dead ends: 101 [2020-09-15 01:14:04,338 INFO L226 Difference]: Without dead ends: 93 [2020-09-15 01:14:04,338 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=623, Invalid=1357, Unknown=0, NotChecked=0, Total=1980 [2020-09-15 01:14:04,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-15 01:14:04,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2020-09-15 01:14:04,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-15 01:14:04,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2020-09-15 01:14:04,341 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 21 [2020-09-15 01:14:04,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:14:04,341 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2020-09-15 01:14:04,341 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-15 01:14:04,341 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2020-09-15 01:14:04,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-15 01:14:04,341 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:14:04,342 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:14:04,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:04,546 INFO L427 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:14:04,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:14:04,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1728807741, now seen corresponding path program 109 times [2020-09-15 01:14:04,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:14:04,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880050814] [2020-09-15 01:14:04,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:14:04,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:04,873 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:04,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880050814] [2020-09-15 01:14:04,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188985527] [2020-09-15 01:14:04,874 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:04,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:04,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-15 01:14:04,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:14:04,952 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:04,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:14:04,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-15 01:14:04,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34193579] [2020-09-15 01:14:04,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-15 01:14:04,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:14:04,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-15 01:14:04,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:14:04,954 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand 18 states. [2020-09-15 01:14:05,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:14:05,482 INFO L93 Difference]: Finished difference Result 114 states and 267 transitions. [2020-09-15 01:14:05,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-15 01:14:05,485 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-15 01:14:05,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:14:05,485 INFO L225 Difference]: With dead ends: 114 [2020-09-15 01:14:05,485 INFO L226 Difference]: Without dead ends: 108 [2020-09-15 01:14:05,486 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2020-09-15 01:14:05,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-15 01:14:05,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 75. [2020-09-15 01:14:05,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-15 01:14:05,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-15 01:14:05,488 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-15 01:14:05,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:14:05,489 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-15 01:14:05,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-15 01:14:05,489 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-15 01:14:05,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-15 01:14:05,490 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:14:05,490 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:14:05,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:05,698 INFO L427 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:14:05,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:14:05,698 INFO L82 PathProgramCache]: Analyzing trace with hash -689910111, now seen corresponding path program 110 times [2020-09-15 01:14:05,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:14:05,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868127132] [2020-09-15 01:14:05,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:14:05,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:05,987 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:05,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868127132] [2020-09-15 01:14:05,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055565356] [2020-09-15 01:14:05,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:06,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:14:06,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:14:06,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-15 01:14:06,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:14:06,082 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:14:06,096 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:06,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:14:06,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-15 01:14:06,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532415375] [2020-09-15 01:14:06,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:14:06,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:14:06,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:14:06,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:14:06,098 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-15 01:14:06,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:14:06,718 INFO L93 Difference]: Finished difference Result 111 states and 261 transitions. [2020-09-15 01:14:06,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-15 01:14:06,719 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-15 01:14:06,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:14:06,719 INFO L225 Difference]: With dead ends: 111 [2020-09-15 01:14:06,719 INFO L226 Difference]: Without dead ends: 105 [2020-09-15 01:14:06,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=362, Invalid=898, Unknown=0, NotChecked=0, Total=1260 [2020-09-15 01:14:06,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-15 01:14:06,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 74. [2020-09-15 01:14:06,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-15 01:14:06,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-15 01:14:06,722 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-15 01:14:06,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:14:06,722 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-15 01:14:06,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:14:06,722 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-15 01:14:06,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-15 01:14:06,723 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:14:06,723 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:14:06,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-09-15 01:14:06,924 INFO L427 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:14:06,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:14:06,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1588321, now seen corresponding path program 111 times [2020-09-15 01:14:06,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:14:06,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631995535] [2020-09-15 01:14:06,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:14:06,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:07,224 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:07,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631995535] [2020-09-15 01:14:07,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84352371] [2020-09-15 01:14:07,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:07,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-15 01:14:07,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:14:07,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-15 01:14:07,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:14:07,310 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:07,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:14:07,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-15 01:14:07,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050622667] [2020-09-15 01:14:07,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-15 01:14:07,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:14:07,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-15 01:14:07,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:14:07,312 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-15 01:14:07,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:14:07,919 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-09-15 01:14:07,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-15 01:14:07,920 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-15 01:14:07,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:14:07,921 INFO L225 Difference]: With dead ends: 108 [2020-09-15 01:14:07,921 INFO L226 Difference]: Without dead ends: 102 [2020-09-15 01:14:07,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=332, Invalid=858, Unknown=0, NotChecked=0, Total=1190 [2020-09-15 01:14:07,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-15 01:14:07,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 75. [2020-09-15 01:14:07,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-15 01:14:07,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-15 01:14:07,924 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-15 01:14:07,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:14:07,924 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-15 01:14:07,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-15 01:14:07,925 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-15 01:14:07,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-15 01:14:07,925 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:14:07,925 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:14:08,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:08,126 INFO L427 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:14:08,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:14:08,128 INFO L82 PathProgramCache]: Analyzing trace with hash 983603203, now seen corresponding path program 112 times [2020-09-15 01:14:08,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:14:08,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122453476] [2020-09-15 01:14:08,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:14:08,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:08,427 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:08,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122453476] [2020-09-15 01:14:08,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751951775] [2020-09-15 01:14:08,428 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:08,486 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:14:08,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:14:08,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-15 01:14:08,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:14:08,533 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:14:08,547 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:08,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:14:08,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-15 01:14:08,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266083488] [2020-09-15 01:14:08,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:14:08,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:14:08,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:14:08,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:14:08,549 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-15 01:14:09,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:14:09,268 INFO L93 Difference]: Finished difference Result 107 states and 253 transitions. [2020-09-15 01:14:09,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-15 01:14:09,269 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-15 01:14:09,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:14:09,270 INFO L225 Difference]: With dead ends: 107 [2020-09-15 01:14:09,270 INFO L226 Difference]: Without dead ends: 101 [2020-09-15 01:14:09,271 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2020-09-15 01:14:09,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-15 01:14:09,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 74. [2020-09-15 01:14:09,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-15 01:14:09,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-15 01:14:09,274 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-15 01:14:09,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:14:09,274 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-15 01:14:09,274 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:14:09,274 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-15 01:14:09,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-15 01:14:09,275 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:14:09,275 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:14:09,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-09-15 01:14:09,484 INFO L427 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:14:09,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:14:09,485 INFO L82 PathProgramCache]: Analyzing trace with hash -633555839, now seen corresponding path program 113 times [2020-09-15 01:14:09,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:14:09,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189784469] [2020-09-15 01:14:09,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:14:09,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:09,774 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:09,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189784469] [2020-09-15 01:14:09,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418088753] [2020-09-15 01:14:09,775 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:09,839 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-15 01:14:09,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:14:09,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-15 01:14:09,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:14:09,858 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:09,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:14:09,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-15 01:14:09,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941370269] [2020-09-15 01:14:09,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-15 01:14:09,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:14:09,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-15 01:14:09,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:14:09,860 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-15 01:14:10,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:14:10,521 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-09-15 01:14:10,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-15 01:14:10,521 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-15 01:14:10,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:14:10,522 INFO L225 Difference]: With dead ends: 104 [2020-09-15 01:14:10,522 INFO L226 Difference]: Without dead ends: 98 [2020-09-15 01:14:10,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=359, Invalid=973, Unknown=0, NotChecked=0, Total=1332 [2020-09-15 01:14:10,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-15 01:14:10,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 75. [2020-09-15 01:14:10,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-15 01:14:10,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-15 01:14:10,525 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-15 01:14:10,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:14:10,525 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-15 01:14:10,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-15 01:14:10,525 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-15 01:14:10,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-15 01:14:10,526 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:14:10,526 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:14:10,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-09-15 01:14:10,732 INFO L427 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:14:10,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:14:10,733 INFO L82 PathProgramCache]: Analyzing trace with hash 623333861, now seen corresponding path program 114 times [2020-09-15 01:14:10,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:14:10,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541569227] [2020-09-15 01:14:10,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:14:10,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:11,009 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:11,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541569227] [2020-09-15 01:14:11,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91181697] [2020-09-15 01:14:11,011 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:11,076 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-15 01:14:11,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:14:11,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-15 01:14:11,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:14:11,114 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:14:11,130 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:11,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:14:11,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-15 01:14:11,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376181369] [2020-09-15 01:14:11,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:14:11,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:14:11,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:14:11,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:14:11,132 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-15 01:14:11,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:14:11,997 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-09-15 01:14:11,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-15 01:14:11,998 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-15 01:14:11,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:14:11,998 INFO L225 Difference]: With dead ends: 103 [2020-09-15 01:14:11,999 INFO L226 Difference]: Without dead ends: 97 [2020-09-15 01:14:11,999 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=414, Invalid=1146, Unknown=0, NotChecked=0, Total=1560 [2020-09-15 01:14:11,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-15 01:14:12,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 74. [2020-09-15 01:14:12,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-15 01:14:12,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-15 01:14:12,002 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-15 01:14:12,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:14:12,002 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-15 01:14:12,002 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:14:12,002 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-15 01:14:12,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-15 01:14:12,003 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:14:12,003 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:14:12,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2020-09-15 01:14:12,208 INFO L427 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:14:12,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:14:12,209 INFO L82 PathProgramCache]: Analyzing trace with hash -2055440925, now seen corresponding path program 115 times [2020-09-15 01:14:12,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:14:12,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794301414] [2020-09-15 01:14:12,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:14:12,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:12,458 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:12,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794301414] [2020-09-15 01:14:12,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117074657] [2020-09-15 01:14:12,458 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:12,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:12,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-15 01:14:12,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:14:12,534 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:12,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:14:12,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-15 01:14:12,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268137703] [2020-09-15 01:14:12,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-15 01:14:12,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:14:12,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-15 01:14:12,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:14:12,536 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-15 01:14:13,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:14:13,268 INFO L93 Difference]: Finished difference Result 100 states and 239 transitions. [2020-09-15 01:14:13,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-15 01:14:13,269 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-15 01:14:13,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:14:13,270 INFO L225 Difference]: With dead ends: 100 [2020-09-15 01:14:13,270 INFO L226 Difference]: Without dead ends: 94 [2020-09-15 01:14:13,271 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 01:14:13,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-15 01:14:13,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 75. [2020-09-15 01:14:13,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-15 01:14:13,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-15 01:14:13,273 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-15 01:14:13,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:14:13,274 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-15 01:14:13,274 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-15 01:14:13,274 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-15 01:14:13,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-15 01:14:13,274 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:14:13,275 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:14:13,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:13,484 INFO L427 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:14:13,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:14:13,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1535697849, now seen corresponding path program 116 times [2020-09-15 01:14:13,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:14:13,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312682015] [2020-09-15 01:14:13,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:14:13,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:13,745 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:13,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312682015] [2020-09-15 01:14:13,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471957849] [2020-09-15 01:14:13,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:13,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:14:13,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:14:13,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-15 01:14:13,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:14:13,842 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:14:13,859 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:13,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:14:13,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-15 01:14:13,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432470989] [2020-09-15 01:14:13,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:14:13,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:14:13,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:14:13,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:14:13,861 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-15 01:14:14,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:14:14,842 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-09-15 01:14:14,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-15 01:14:14,843 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-15 01:14:14,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:14:14,844 INFO L225 Difference]: With dead ends: 99 [2020-09-15 01:14:14,844 INFO L226 Difference]: Without dead ends: 93 [2020-09-15 01:14:14,844 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=464, Invalid=1258, Unknown=0, NotChecked=0, Total=1722 [2020-09-15 01:14:14,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-15 01:14:14,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 74. [2020-09-15 01:14:14,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-15 01:14:14,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-15 01:14:14,846 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-15 01:14:14,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:14:14,847 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-15 01:14:14,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:14:14,847 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-15 01:14:14,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-15 01:14:14,847 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:14:14,847 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:14:15,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-09-15 01:14:15,048 INFO L427 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:14:15,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:14:15,049 INFO L82 PathProgramCache]: Analyzing trace with hash 119613381, now seen corresponding path program 117 times [2020-09-15 01:14:15,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:14:15,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12880290] [2020-09-15 01:14:15,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:14:15,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:15,306 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:15,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12880290] [2020-09-15 01:14:15,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157424715] [2020-09-15 01:14:15,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:15,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-15 01:14:15,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:14:15,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-15 01:14:15,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:14:15,395 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:15,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:14:15,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-15 01:14:15,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308240887] [2020-09-15 01:14:15,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-15 01:14:15,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:14:15,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-15 01:14:15,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:14:15,397 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-15 01:14:16,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:14:16,201 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-09-15 01:14:16,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-15 01:14:16,202 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-15 01:14:16,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:14:16,202 INFO L225 Difference]: With dead ends: 96 [2020-09-15 01:14:16,203 INFO L226 Difference]: Without dead ends: 90 [2020-09-15 01:14:16,203 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=461, Invalid=1179, Unknown=0, NotChecked=0, Total=1640 [2020-09-15 01:14:16,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-15 01:14:16,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 75. [2020-09-15 01:14:16,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-15 01:14:16,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-15 01:14:16,206 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-15 01:14:16,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:14:16,206 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-15 01:14:16,206 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-15 01:14:16,206 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-15 01:14:16,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-15 01:14:16,207 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:14:16,207 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:14:16,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:16,413 INFO L427 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:14:16,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:14:16,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1600514263, now seen corresponding path program 118 times [2020-09-15 01:14:16,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:14:16,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802648650] [2020-09-15 01:14:16,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:14:16,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:16,677 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:16,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802648650] [2020-09-15 01:14:16,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107423219] [2020-09-15 01:14:16,678 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:16,740 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:14:16,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:14:16,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-15 01:14:16,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:14:16,772 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:14:16,790 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:16,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:14:16,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-15 01:14:16,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868546474] [2020-09-15 01:14:16,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:14:16,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:14:16,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:14:16,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:14:16,792 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-15 01:14:17,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:14:17,869 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-09-15 01:14:17,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 01:14:17,869 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-15 01:14:17,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:14:17,870 INFO L225 Difference]: With dead ends: 95 [2020-09-15 01:14:17,870 INFO L226 Difference]: Without dead ends: 89 [2020-09-15 01:14:17,871 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=530, Invalid=1362, Unknown=0, NotChecked=0, Total=1892 [2020-09-15 01:14:17,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-15 01:14:17,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2020-09-15 01:14:17,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-15 01:14:17,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-15 01:14:17,873 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-15 01:14:17,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:14:17,873 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-15 01:14:17,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:14:17,873 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-15 01:14:17,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-15 01:14:17,873 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:14:17,873 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:14:18,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:18,074 INFO L427 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:14:18,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:14:18,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1129518553, now seen corresponding path program 119 times [2020-09-15 01:14:18,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:14:18,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977724316] [2020-09-15 01:14:18,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:14:18,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:18,353 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:18,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977724316] [2020-09-15 01:14:18,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620894879] [2020-09-15 01:14:18,354 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:18,432 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-15 01:14:18,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:14:18,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-15 01:14:18,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:14:18,464 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:18,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:14:18,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-15 01:14:18,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125086437] [2020-09-15 01:14:18,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-15 01:14:18,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:14:18,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-15 01:14:18,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:14:18,467 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-15 01:14:19,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:14:19,378 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-09-15 01:14:19,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-15 01:14:19,379 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-15 01:14:19,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:14:19,380 INFO L225 Difference]: With dead ends: 92 [2020-09-15 01:14:19,380 INFO L226 Difference]: Without dead ends: 86 [2020-09-15 01:14:19,380 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2020-09-15 01:14:19,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-15 01:14:19,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75. [2020-09-15 01:14:19,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-15 01:14:19,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-15 01:14:19,383 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-15 01:14:19,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:14:19,383 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-15 01:14:19,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-15 01:14:19,383 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-15 01:14:19,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-15 01:14:19,383 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:14:19,383 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:14:19,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:19,585 INFO L427 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:14:19,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:14:19,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1113431413, now seen corresponding path program 120 times [2020-09-15 01:14:19,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:14:19,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360776983] [2020-09-15 01:14:19,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:14:19,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:19,846 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:19,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360776983] [2020-09-15 01:14:19,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273754851] [2020-09-15 01:14:19,847 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:19,912 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-15 01:14:19,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:14:19,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-15 01:14:19,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:14:19,945 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:14:19,963 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:19,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:14:19,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-15 01:14:19,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270422135] [2020-09-15 01:14:19,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:14:19,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:14:19,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:14:19,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:14:19,965 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-15 01:14:21,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:14:21,142 INFO L93 Difference]: Finished difference Result 91 states and 221 transitions. [2020-09-15 01:14:21,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 01:14:21,144 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-15 01:14:21,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:14:21,144 INFO L225 Difference]: With dead ends: 91 [2020-09-15 01:14:21,144 INFO L226 Difference]: Without dead ends: 85 [2020-09-15 01:14:21,145 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=612, Invalid=1458, Unknown=0, NotChecked=0, Total=2070 [2020-09-15 01:14:21,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-15 01:14:21,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 74. [2020-09-15 01:14:21,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-15 01:14:21,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-15 01:14:21,147 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-15 01:14:21,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:14:21,148 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-15 01:14:21,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:14:21,148 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-15 01:14:21,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-15 01:14:21,148 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:14:21,148 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:14:21,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:21,349 INFO L427 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:14:21,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:14:21,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1112941303, now seen corresponding path program 121 times [2020-09-15 01:14:21,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:14:21,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802977098] [2020-09-15 01:14:21,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:14:21,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:21,606 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:21,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802977098] [2020-09-15 01:14:21,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002040244] [2020-09-15 01:14:21,607 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:21,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:21,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-15 01:14:21,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:14:21,738 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:21,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:14:21,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-15 01:14:21,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182991249] [2020-09-15 01:14:21,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-15 01:14:21,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:14:21,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-15 01:14:21,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:14:21,740 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-15 01:14:22,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:14:22,710 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-09-15 01:14:22,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-15 01:14:22,711 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-15 01:14:22,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:14:22,712 INFO L225 Difference]: With dead ends: 107 [2020-09-15 01:14:22,712 INFO L226 Difference]: Without dead ends: 101 [2020-09-15 01:14:22,712 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=627, Invalid=1353, Unknown=0, NotChecked=0, Total=1980 [2020-09-15 01:14:22,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-15 01:14:22,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 78. [2020-09-15 01:14:22,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-15 01:14:22,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 201 transitions. [2020-09-15 01:14:22,714 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 201 transitions. Word has length 22 [2020-09-15 01:14:22,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:14:22,715 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 201 transitions. [2020-09-15 01:14:22,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-15 01:14:22,715 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 201 transitions. [2020-09-15 01:14:22,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-15 01:14:22,715 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:14:22,715 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:14:22,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-09-15 01:14:22,919 INFO L427 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:14:22,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:14:22,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1112924563, now seen corresponding path program 122 times [2020-09-15 01:14:22,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:14:22,921 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687327791] [2020-09-15 01:14:22,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:14:22,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:23,170 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:23,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687327791] [2020-09-15 01:14:23,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053489913] [2020-09-15 01:14:23,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:23,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:14:23,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:14:23,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-15 01:14:23,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:14:23,262 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:14:23,282 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:23,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:14:23,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-15 01:14:23,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043952061] [2020-09-15 01:14:23,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:14:23,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:14:23,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:14:23,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:14:23,284 INFO L87 Difference]: Start difference. First operand 78 states and 201 transitions. Second operand 19 states. [2020-09-15 01:14:24,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:14:24,551 INFO L93 Difference]: Finished difference Result 88 states and 217 transitions. [2020-09-15 01:14:24,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-15 01:14:24,552 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-15 01:14:24,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:14:24,553 INFO L225 Difference]: With dead ends: 88 [2020-09-15 01:14:24,553 INFO L226 Difference]: Without dead ends: 80 [2020-09-15 01:14:24,553 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=710, Invalid=1546, Unknown=0, NotChecked=0, Total=2256 [2020-09-15 01:14:24,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-15 01:14:24,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 57. [2020-09-15 01:14:24,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-15 01:14:24,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 138 transitions. [2020-09-15 01:14:24,556 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 138 transitions. Word has length 22 [2020-09-15 01:14:24,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:14:24,556 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 138 transitions. [2020-09-15 01:14:24,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:14:24,556 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 138 transitions. [2020-09-15 01:14:24,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-15 01:14:24,556 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:14:24,556 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:14:24,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2020-09-15 01:14:24,761 INFO L427 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:14:24,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:14:24,761 INFO L82 PathProgramCache]: Analyzing trace with hash 117880753, now seen corresponding path program 123 times [2020-09-15 01:14:24,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:14:24,762 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476900394] [2020-09-15 01:14:24,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:14:24,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:24,985 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:24,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476900394] [2020-09-15 01:14:24,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571049006] [2020-09-15 01:14:24,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:25,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-15 01:14:25,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:14:25,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-15 01:14:25,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:14:25,079 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:14:25,101 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:25,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:14:25,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-15 01:14:25,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90511011] [2020-09-15 01:14:25,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:14:25,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:14:25,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:14:25,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:14:25,104 INFO L87 Difference]: Start difference. First operand 57 states and 138 transitions. Second operand 19 states. [2020-09-15 01:14:26,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:14:26,295 INFO L93 Difference]: Finished difference Result 100 states and 243 transitions. [2020-09-15 01:14:26,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-15 01:14:26,296 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-15 01:14:26,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:14:26,297 INFO L225 Difference]: With dead ends: 100 [2020-09-15 01:14:26,297 INFO L226 Difference]: Without dead ends: 95 [2020-09-15 01:14:26,297 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=745, Invalid=1511, Unknown=0, NotChecked=0, Total=2256 [2020-09-15 01:14:26,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-15 01:14:26,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 76. [2020-09-15 01:14:26,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-15 01:14:26,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-09-15 01:14:26,300 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 22 [2020-09-15 01:14:26,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:14:26,300 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-09-15 01:14:26,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:14:26,300 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-09-15 01:14:26,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 01:14:26,301 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:14:26,301 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:14:26,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-09-15 01:14:26,503 INFO L427 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:14:26,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:14:26,503 INFO L82 PathProgramCache]: Analyzing trace with hash -140906778, now seen corresponding path program 124 times [2020-09-15 01:14:26,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:14:26,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571143939] [2020-09-15 01:14:26,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:14:26,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:26,787 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:26,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571143939] [2020-09-15 01:14:26,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583184931] [2020-09-15 01:14:26,788 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:26,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:14:26,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:14:26,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-15 01:14:26,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:14:26,891 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:14:26,916 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:26,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:14:26,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-15 01:14:26,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327289499] [2020-09-15 01:14:26,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 01:14:26,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:14:26,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 01:14:26,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:14:26,918 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 20 states. [2020-09-15 01:14:28,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:14:28,189 INFO L93 Difference]: Finished difference Result 84 states and 213 transitions. [2020-09-15 01:14:28,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-15 01:14:28,190 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-15 01:14:28,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:14:28,191 INFO L225 Difference]: With dead ends: 84 [2020-09-15 01:14:28,191 INFO L226 Difference]: Without dead ends: 79 [2020-09-15 01:14:28,191 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=761, Invalid=1591, Unknown=0, NotChecked=0, Total=2352 [2020-09-15 01:14:28,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-15 01:14:28,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 58. [2020-09-15 01:14:28,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-15 01:14:28,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 142 transitions. [2020-09-15 01:14:28,194 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 142 transitions. Word has length 23 [2020-09-15 01:14:28,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:14:28,194 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 142 transitions. [2020-09-15 01:14:28,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 01:14:28,194 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 142 transitions. [2020-09-15 01:14:28,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 01:14:28,195 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:14:28,195 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:14:28,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-09-15 01:14:28,399 INFO L427 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:14:28,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:14:28,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1335609647, now seen corresponding path program 125 times [2020-09-15 01:14:28,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:14:28,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493589130] [2020-09-15 01:14:28,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:14:28,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:28,754 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:28,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493589130] [2020-09-15 01:14:28,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860440785] [2020-09-15 01:14:28,755 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:28,821 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-15 01:14:28,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:14:28,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-15 01:14:28,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:14:28,835 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:28,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:14:28,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-15 01:14:28,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725060174] [2020-09-15 01:14:28,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:14:28,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:14:28,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:14:28,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:14:28,837 INFO L87 Difference]: Start difference. First operand 58 states and 142 transitions. Second operand 19 states. [2020-09-15 01:14:29,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:14:29,369 INFO L93 Difference]: Finished difference Result 90 states and 209 transitions. [2020-09-15 01:14:29,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-15 01:14:29,370 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-15 01:14:29,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:14:29,370 INFO L225 Difference]: With dead ends: 90 [2020-09-15 01:14:29,371 INFO L226 Difference]: Without dead ends: 84 [2020-09-15 01:14:29,371 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=363, Invalid=759, Unknown=0, NotChecked=0, Total=1122 [2020-09-15 01:14:29,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-15 01:14:29,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2020-09-15 01:14:29,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-15 01:14:29,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 161 transitions. [2020-09-15 01:14:29,373 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 161 transitions. Word has length 23 [2020-09-15 01:14:29,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:14:29,373 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 161 transitions. [2020-09-15 01:14:29,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:14:29,374 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 161 transitions. [2020-09-15 01:14:29,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 01:14:29,374 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:14:29,374 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:14:29,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:29,578 INFO L427 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:14:29,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:14:29,579 INFO L82 PathProgramCache]: Analyzing trace with hash -2146158283, now seen corresponding path program 126 times [2020-09-15 01:14:29,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:14:29,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888202198] [2020-09-15 01:14:29,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:14:29,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:29,944 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:29,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888202198] [2020-09-15 01:14:29,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401655778] [2020-09-15 01:14:29,945 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:30,012 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-15 01:14:30,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:14:30,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-15 01:14:30,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:14:30,047 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:14:30,060 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:30,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:14:30,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-15 01:14:30,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766075027] [2020-09-15 01:14:30,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 01:14:30,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:14:30,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 01:14:30,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:14:30,062 INFO L87 Difference]: Start difference. First operand 66 states and 161 transitions. Second operand 20 states. [2020-09-15 01:14:30,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:14:30,652 INFO L93 Difference]: Finished difference Result 106 states and 241 transitions. [2020-09-15 01:14:30,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-15 01:14:30,653 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-15 01:14:30,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:14:30,654 INFO L225 Difference]: With dead ends: 106 [2020-09-15 01:14:30,654 INFO L226 Difference]: Without dead ends: 100 [2020-09-15 01:14:30,655 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=372, Invalid=888, Unknown=0, NotChecked=0, Total=1260 [2020-09-15 01:14:30,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-15 01:14:30,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-09-15 01:14:30,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-15 01:14:30,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 157 transitions. [2020-09-15 01:14:30,657 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 157 transitions. Word has length 23 [2020-09-15 01:14:30,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:14:30,658 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 157 transitions. [2020-09-15 01:14:30,658 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 01:14:30,658 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 157 transitions. [2020-09-15 01:14:30,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 01:14:30,658 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:14:30,659 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:14:30,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2020-09-15 01:14:30,862 INFO L427 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:14:30,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:14:30,863 INFO L82 PathProgramCache]: Analyzing trace with hash -2093881677, now seen corresponding path program 127 times [2020-09-15 01:14:30,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:14:30,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93733198] [2020-09-15 01:14:30,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:14:30,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:31,219 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:31,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93733198] [2020-09-15 01:14:31,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621413334] [2020-09-15 01:14:31,220 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:31,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:31,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-15 01:14:31,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:14:31,298 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:31,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:14:31,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-15 01:14:31,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541253422] [2020-09-15 01:14:31,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:14:31,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:14:31,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:14:31,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:14:31,300 INFO L87 Difference]: Start difference. First operand 64 states and 157 transitions. Second operand 19 states. [2020-09-15 01:14:32,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:14:32,000 INFO L93 Difference]: Finished difference Result 107 states and 245 transitions. [2020-09-15 01:14:32,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-15 01:14:32,001 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-15 01:14:32,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:14:32,002 INFO L225 Difference]: With dead ends: 107 [2020-09-15 01:14:32,002 INFO L226 Difference]: Without dead ends: 101 [2020-09-15 01:14:32,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=377, Invalid=955, Unknown=0, NotChecked=0, Total=1332 [2020-09-15 01:14:32,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-15 01:14:32,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-09-15 01:14:32,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-15 01:14:32,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 165 transitions. [2020-09-15 01:14:32,006 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 165 transitions. Word has length 23 [2020-09-15 01:14:32,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:14:32,006 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 165 transitions. [2020-09-15 01:14:32,006 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:14:32,006 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 165 transitions. [2020-09-15 01:14:32,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 01:14:32,007 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:14:32,007 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:14:32,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-09-15 01:14:32,217 INFO L427 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:14:32,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:14:32,218 INFO L82 PathProgramCache]: Analyzing trace with hash -217632233, now seen corresponding path program 128 times [2020-09-15 01:14:32,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:14:32,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185288999] [2020-09-15 01:14:32,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:14:32,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:32,554 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:32,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185288999] [2020-09-15 01:14:32,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90718566] [2020-09-15 01:14:32,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:32,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:14:32,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:14:32,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-15 01:14:32,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:14:32,643 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:14:32,656 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:32,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:14:32,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-15 01:14:32,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102050552] [2020-09-15 01:14:32,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 01:14:32,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:14:32,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 01:14:32,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:14:32,657 INFO L87 Difference]: Start difference. First operand 67 states and 165 transitions. Second operand 20 states. [2020-09-15 01:14:33,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:14:33,352 INFO L93 Difference]: Finished difference Result 119 states and 269 transitions. [2020-09-15 01:14:33,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-15 01:14:33,353 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-15 01:14:33,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:14:33,354 INFO L225 Difference]: With dead ends: 119 [2020-09-15 01:14:33,354 INFO L226 Difference]: Without dead ends: 113 [2020-09-15 01:14:33,354 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=409, Invalid=1073, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 01:14:33,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-15 01:14:33,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 66. [2020-09-15 01:14:33,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-15 01:14:33,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 163 transitions. [2020-09-15 01:14:33,356 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 163 transitions. Word has length 23 [2020-09-15 01:14:33,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:14:33,357 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 163 transitions. [2020-09-15 01:14:33,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 01:14:33,357 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 163 transitions. [2020-09-15 01:14:33,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 01:14:33,357 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:14:33,357 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:14:33,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2020-09-15 01:14:33,558 INFO L427 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:14:33,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:14:33,559 INFO L82 PathProgramCache]: Analyzing trace with hash 470689557, now seen corresponding path program 129 times [2020-09-15 01:14:33,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:14:33,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124445555] [2020-09-15 01:14:33,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:14:33,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:33,887 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:33,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124445555] [2020-09-15 01:14:33,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556552888] [2020-09-15 01:14:33,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:33,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-15 01:14:33,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:14:33,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-15 01:14:33,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:14:33,980 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:33,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:14:33,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-15 01:14:33,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322376017] [2020-09-15 01:14:33,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:14:33,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:14:33,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:14:33,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:14:33,982 INFO L87 Difference]: Start difference. First operand 66 states and 163 transitions. Second operand 19 states. [2020-09-15 01:14:34,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:14:34,740 INFO L93 Difference]: Finished difference Result 119 states and 271 transitions. [2020-09-15 01:14:34,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-15 01:14:34,741 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-15 01:14:34,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:14:34,742 INFO L225 Difference]: With dead ends: 119 [2020-09-15 01:14:34,742 INFO L226 Difference]: Without dead ends: 113 [2020-09-15 01:14:34,742 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=428, Invalid=1132, Unknown=0, NotChecked=0, Total=1560 [2020-09-15 01:14:34,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-15 01:14:34,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 69. [2020-09-15 01:14:34,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-15 01:14:34,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 171 transitions. [2020-09-15 01:14:34,744 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 171 transitions. Word has length 23 [2020-09-15 01:14:34,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:14:34,745 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 171 transitions. [2020-09-15 01:14:34,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:14:34,745 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 171 transitions. [2020-09-15 01:14:34,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 01:14:34,745 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:14:34,745 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:14:34,953 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:34,953 INFO L427 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:14:34,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:14:34,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1455881081, now seen corresponding path program 130 times [2020-09-15 01:14:34,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:14:34,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267309172] [2020-09-15 01:14:34,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:14:34,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:35,243 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:35,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267309172] [2020-09-15 01:14:35,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596817109] [2020-09-15 01:14:35,244 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:35,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:14:35,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:14:35,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-15 01:14:35,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:14:35,347 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:14:35,365 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:35,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:14:35,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-15 01:14:35,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027458805] [2020-09-15 01:14:35,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 01:14:35,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:14:35,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 01:14:35,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:14:35,367 INFO L87 Difference]: Start difference. First operand 69 states and 171 transitions. Second operand 20 states. [2020-09-15 01:14:36,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:14:36,249 INFO L93 Difference]: Finished difference Result 116 states and 265 transitions. [2020-09-15 01:14:36,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-15 01:14:36,250 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-15 01:14:36,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:14:36,251 INFO L225 Difference]: With dead ends: 116 [2020-09-15 01:14:36,251 INFO L226 Difference]: Without dead ends: 110 [2020-09-15 01:14:36,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=434, Invalid=1206, Unknown=0, NotChecked=0, Total=1640 [2020-09-15 01:14:36,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-15 01:14:36,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 68. [2020-09-15 01:14:36,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-15 01:14:36,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 169 transitions. [2020-09-15 01:14:36,255 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 169 transitions. Word has length 23 [2020-09-15 01:14:36,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:14:36,255 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 169 transitions. [2020-09-15 01:14:36,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 01:14:36,255 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 169 transitions. [2020-09-15 01:14:36,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 01:14:36,255 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:14:36,255 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:14:36,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:36,457 INFO L427 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:14:36,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:14:36,457 INFO L82 PathProgramCache]: Analyzing trace with hash -161277961, now seen corresponding path program 131 times [2020-09-15 01:14:36,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:14:36,458 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718675478] [2020-09-15 01:14:36,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:14:36,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:36,769 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:36,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718675478] [2020-09-15 01:14:36,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128295073] [2020-09-15 01:14:36,770 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:36,838 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-15 01:14:36,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:14:36,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-15 01:14:36,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:14:36,863 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:36,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:14:36,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-15 01:14:36,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665982793] [2020-09-15 01:14:36,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:14:36,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:14:36,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:14:36,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:14:36,866 INFO L87 Difference]: Start difference. First operand 68 states and 169 transitions. Second operand 19 states. [2020-09-15 01:14:37,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:14:37,705 INFO L93 Difference]: Finished difference Result 117 states and 269 transitions. [2020-09-15 01:14:37,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-15 01:14:37,706 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-15 01:14:37,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:14:37,707 INFO L225 Difference]: With dead ends: 117 [2020-09-15 01:14:37,707 INFO L226 Difference]: Without dead ends: 111 [2020-09-15 01:14:37,708 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=468, Invalid=1254, Unknown=0, NotChecked=0, Total=1722 [2020-09-15 01:14:37,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-15 01:14:37,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 71. [2020-09-15 01:14:37,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-15 01:14:37,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 177 transitions. [2020-09-15 01:14:37,710 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 177 transitions. Word has length 23 [2020-09-15 01:14:37,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:14:37,711 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 177 transitions. [2020-09-15 01:14:37,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:14:37,711 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 177 transitions. [2020-09-15 01:14:37,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 01:14:37,711 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:14:37,711 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:14:37,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:37,920 INFO L427 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:14:37,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:14:37,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1095611739, now seen corresponding path program 132 times [2020-09-15 01:14:37,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:14:37,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568308757] [2020-09-15 01:14:37,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:14:37,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:38,214 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:38,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568308757] [2020-09-15 01:14:38,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983332366] [2020-09-15 01:14:38,215 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:38,283 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-15 01:14:38,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:14:38,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-15 01:14:38,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:14:38,322 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:14:38,337 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:38,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:14:38,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-15 01:14:38,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287333202] [2020-09-15 01:14:38,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 01:14:38,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:14:38,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 01:14:38,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:14:38,339 INFO L87 Difference]: Start difference. First operand 71 states and 177 transitions. Second operand 20 states. [2020-09-15 01:14:39,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:14:39,340 INFO L93 Difference]: Finished difference Result 114 states and 263 transitions. [2020-09-15 01:14:39,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-15 01:14:39,341 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-15 01:14:39,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:14:39,341 INFO L225 Difference]: With dead ends: 114 [2020-09-15 01:14:39,341 INFO L226 Difference]: Without dead ends: 108 [2020-09-15 01:14:39,342 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=475, Invalid=1331, Unknown=0, NotChecked=0, Total=1806 [2020-09-15 01:14:39,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-15 01:14:39,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 70. [2020-09-15 01:14:39,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-15 01:14:39,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 175 transitions. [2020-09-15 01:14:39,344 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 175 transitions. Word has length 23 [2020-09-15 01:14:39,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:14:39,345 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 175 transitions. [2020-09-15 01:14:39,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 01:14:39,345 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 175 transitions. [2020-09-15 01:14:39,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 01:14:39,345 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:14:39,345 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:14:39,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-09-15 01:14:39,548 INFO L427 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:14:39,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:14:39,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1583163047, now seen corresponding path program 133 times [2020-09-15 01:14:39,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:14:39,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067155691] [2020-09-15 01:14:39,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:14:39,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:39,846 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:39,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067155691] [2020-09-15 01:14:39,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127149293] [2020-09-15 01:14:39,847 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:39,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:39,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-15 01:14:39,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:14:39,926 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:39,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:14:39,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-15 01:14:39,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621759447] [2020-09-15 01:14:39,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:14:39,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:14:39,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:14:39,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:14:39,928 INFO L87 Difference]: Start difference. First operand 70 states and 175 transitions. Second operand 19 states. [2020-09-15 01:14:40,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:14:40,842 INFO L93 Difference]: Finished difference Result 115 states and 267 transitions. [2020-09-15 01:14:40,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-15 01:14:40,843 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-15 01:14:40,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:14:40,844 INFO L225 Difference]: With dead ends: 115 [2020-09-15 01:14:40,844 INFO L226 Difference]: Without dead ends: 109 [2020-09-15 01:14:40,845 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=524, Invalid=1368, Unknown=0, NotChecked=0, Total=1892 [2020-09-15 01:14:40,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-15 01:14:40,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73. [2020-09-15 01:14:40,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-15 01:14:40,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2020-09-15 01:14:40,847 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 23 [2020-09-15 01:14:40,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:14:40,847 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2020-09-15 01:14:40,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:14:40,847 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2020-09-15 01:14:40,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 01:14:40,848 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:14:40,848 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:14:41,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:41,052 INFO L427 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:14:41,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:14:41,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1063419971, now seen corresponding path program 134 times [2020-09-15 01:14:41,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:14:41,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507769469] [2020-09-15 01:14:41,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:14:41,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:41,334 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:41,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507769469] [2020-09-15 01:14:41,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298395377] [2020-09-15 01:14:41,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:41,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:14:41,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:14:41,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-15 01:14:41,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:14:41,433 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:14:41,451 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:41,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:14:41,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-15 01:14:41,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82587363] [2020-09-15 01:14:41,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 01:14:41,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:14:41,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 01:14:41,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:14:41,452 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 20 states. [2020-09-15 01:14:42,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:14:42,572 INFO L93 Difference]: Finished difference Result 112 states and 261 transitions. [2020-09-15 01:14:42,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 01:14:42,573 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-15 01:14:42,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:14:42,574 INFO L225 Difference]: With dead ends: 112 [2020-09-15 01:14:42,574 INFO L226 Difference]: Without dead ends: 106 [2020-09-15 01:14:42,575 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=532, Invalid=1448, Unknown=0, NotChecked=0, Total=1980 [2020-09-15 01:14:42,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-15 01:14:42,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 72. [2020-09-15 01:14:42,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-15 01:14:42,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 181 transitions. [2020-09-15 01:14:42,583 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 181 transitions. Word has length 23 [2020-09-15 01:14:42,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:14:42,583 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 181 transitions. [2020-09-15 01:14:42,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 01:14:42,584 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 181 transitions. [2020-09-15 01:14:42,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 01:14:42,584 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:14:42,584 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:14:42,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-09-15 01:14:42,785 INFO L427 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:14:42,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:14:42,786 INFO L82 PathProgramCache]: Analyzing trace with hash 591891259, now seen corresponding path program 135 times [2020-09-15 01:14:42,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:14:42,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218263892] [2020-09-15 01:14:42,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:14:42,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:43,074 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:43,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218263892] [2020-09-15 01:14:43,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855634765] [2020-09-15 01:14:43,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:43,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-15 01:14:43,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:14:43,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-15 01:14:43,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:14:43,167 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:43,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:14:43,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-15 01:14:43,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138207524] [2020-09-15 01:14:43,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:14:43,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:14:43,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:14:43,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:14:43,169 INFO L87 Difference]: Start difference. First operand 72 states and 181 transitions. Second operand 19 states. [2020-09-15 01:14:44,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:14:44,162 INFO L93 Difference]: Finished difference Result 113 states and 265 transitions. [2020-09-15 01:14:44,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-15 01:14:44,163 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-15 01:14:44,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:14:44,164 INFO L225 Difference]: With dead ends: 113 [2020-09-15 01:14:44,164 INFO L226 Difference]: Without dead ends: 107 [2020-09-15 01:14:44,165 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=596, Invalid=1474, Unknown=0, NotChecked=0, Total=2070 [2020-09-15 01:14:44,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-15 01:14:44,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 75. [2020-09-15 01:14:44,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-15 01:14:44,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-15 01:14:44,167 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 23 [2020-09-15 01:14:44,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:14:44,168 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-15 01:14:44,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:14:44,168 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-15 01:14:44,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 01:14:44,168 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:14:44,168 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:14:44,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-09-15 01:14:44,369 INFO L427 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:14:44,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:14:44,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1128236385, now seen corresponding path program 136 times [2020-09-15 01:14:44,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:14:44,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999191931] [2020-09-15 01:14:44,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:14:44,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:44,650 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:44,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999191931] [2020-09-15 01:14:44,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434763556] [2020-09-15 01:14:44,651 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:44,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:14:44,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:14:44,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-15 01:14:44,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:14:44,749 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:14:44,766 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:44,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:14:44,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-15 01:14:44,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773623505] [2020-09-15 01:14:44,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 01:14:44,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:14:44,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 01:14:44,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:14:44,768 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 20 states. [2020-09-15 01:14:46,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:14:46,014 INFO L93 Difference]: Finished difference Result 110 states and 259 transitions. [2020-09-15 01:14:46,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 01:14:46,016 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-15 01:14:46,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:14:46,016 INFO L225 Difference]: With dead ends: 110 [2020-09-15 01:14:46,016 INFO L226 Difference]: Without dead ends: 104 [2020-09-15 01:14:46,017 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=605, Invalid=1557, Unknown=0, NotChecked=0, Total=2162 [2020-09-15 01:14:46,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-09-15 01:14:46,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 74. [2020-09-15 01:14:46,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-15 01:14:46,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-15 01:14:46,019 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 23 [2020-09-15 01:14:46,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:14:46,019 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-15 01:14:46,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 01:14:46,019 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-15 01:14:46,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 01:14:46,019 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:14:46,020 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:14:46,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2020-09-15 01:14:46,221 INFO L427 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:14:46,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:14:46,221 INFO L82 PathProgramCache]: Analyzing trace with hash -657240675, now seen corresponding path program 137 times [2020-09-15 01:14:46,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:14:46,222 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968936216] [2020-09-15 01:14:46,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:14:46,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:46,555 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:46,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968936216] [2020-09-15 01:14:46,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943864530] [2020-09-15 01:14:46,556 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:46,631 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-15 01:14:46,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:14:46,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-15 01:14:46,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:14:46,680 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:46,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:14:46,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-15 01:14:46,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019489254] [2020-09-15 01:14:46,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:14:46,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:14:46,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:14:46,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:14:46,682 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 19 states. [2020-09-15 01:14:47,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:14:47,819 INFO L93 Difference]: Finished difference Result 111 states and 263 transitions. [2020-09-15 01:14:47,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-15 01:14:47,820 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-15 01:14:47,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:14:47,821 INFO L225 Difference]: With dead ends: 111 [2020-09-15 01:14:47,821 INFO L226 Difference]: Without dead ends: 105 [2020-09-15 01:14:47,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=684, Invalid=1572, Unknown=0, NotChecked=0, Total=2256 [2020-09-15 01:14:47,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-15 01:14:47,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 77. [2020-09-15 01:14:47,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-15 01:14:47,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 195 transitions. [2020-09-15 01:14:47,824 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 195 transitions. Word has length 23 [2020-09-15 01:14:47,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:14:47,824 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 195 transitions. [2020-09-15 01:14:47,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:14:47,825 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 195 transitions. [2020-09-15 01:14:47,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 01:14:47,825 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:14:47,825 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:14:48,025 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:48,026 INFO L427 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:14:48,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:14:48,026 INFO L82 PathProgramCache]: Analyzing trace with hash -641153535, now seen corresponding path program 138 times [2020-09-15 01:14:48,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:14:48,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681999958] [2020-09-15 01:14:48,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:14:48,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:48,300 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:48,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681999958] [2020-09-15 01:14:48,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067005684] [2020-09-15 01:14:48,301 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:48,367 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-15 01:14:48,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:14:48,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-15 01:14:48,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:14:48,400 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:14:48,419 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:48,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:14:48,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-15 01:14:48,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683330694] [2020-09-15 01:14:48,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 01:14:48,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:14:48,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 01:14:48,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:14:48,421 INFO L87 Difference]: Start difference. First operand 77 states and 195 transitions. Second operand 20 states. [2020-09-15 01:14:49,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:14:49,734 INFO L93 Difference]: Finished difference Result 108 states and 257 transitions. [2020-09-15 01:14:49,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-15 01:14:49,736 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-15 01:14:49,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:14:49,736 INFO L225 Difference]: With dead ends: 108 [2020-09-15 01:14:49,737 INFO L226 Difference]: Without dead ends: 102 [2020-09-15 01:14:49,737 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=694, Invalid=1658, Unknown=0, NotChecked=0, Total=2352 [2020-09-15 01:14:49,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-15 01:14:49,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 76. [2020-09-15 01:14:49,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-15 01:14:49,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-09-15 01:14:49,739 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 23 [2020-09-15 01:14:49,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:14:49,739 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-09-15 01:14:49,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 01:14:49,739 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-09-15 01:14:49,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 01:14:49,740 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:14:49,740 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:14:49,940 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-09-15 01:14:49,941 INFO L427 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:14:49,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:14:49,941 INFO L82 PathProgramCache]: Analyzing trace with hash -640663425, now seen corresponding path program 139 times [2020-09-15 01:14:49,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:14:49,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179913714] [2020-09-15 01:14:49,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:14:49,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:50,209 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:50,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179913714] [2020-09-15 01:14:50,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819273622] [2020-09-15 01:14:50,210 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:50,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:50,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-15 01:14:50,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:14:50,304 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:50,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:14:50,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-15 01:14:50,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758570418] [2020-09-15 01:14:50,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:14:50,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:14:50,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:14:50,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:14:50,306 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 19 states. [2020-09-15 01:14:51,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:14:51,424 INFO L93 Difference]: Finished difference Result 128 states and 307 transitions. [2020-09-15 01:14:51,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-15 01:14:51,426 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-15 01:14:51,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:14:51,426 INFO L225 Difference]: With dead ends: 128 [2020-09-15 01:14:51,426 INFO L226 Difference]: Without dead ends: 122 [2020-09-15 01:14:51,427 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=788, Invalid=1662, Unknown=0, NotChecked=0, Total=2450 [2020-09-15 01:14:51,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-15 01:14:51,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 82. [2020-09-15 01:14:51,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-15 01:14:51,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 213 transitions. [2020-09-15 01:14:51,429 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 213 transitions. Word has length 23 [2020-09-15 01:14:51,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:14:51,429 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 213 transitions. [2020-09-15 01:14:51,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:14:51,429 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 213 transitions. [2020-09-15 01:14:51,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 01:14:51,430 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:14:51,430 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:14:51,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:51,638 INFO L427 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:14:51,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:14:51,639 INFO L82 PathProgramCache]: Analyzing trace with hash -640646685, now seen corresponding path program 140 times [2020-09-15 01:14:51,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:14:51,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551683235] [2020-09-15 01:14:51,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:14:51,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:51,931 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:51,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551683235] [2020-09-15 01:14:51,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553277] [2020-09-15 01:14:51,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:51,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:14:51,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:14:51,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-15 01:14:51,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:14:52,062 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:52,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:14:52,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-15 01:14:52,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023059406] [2020-09-15 01:14:52,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 01:14:52,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:14:52,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 01:14:52,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:14:52,064 INFO L87 Difference]: Start difference. First operand 82 states and 213 transitions. Second operand 20 states. [2020-09-15 01:14:53,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:14:53,401 INFO L93 Difference]: Finished difference Result 109 states and 263 transitions. [2020-09-15 01:14:53,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-15 01:14:53,402 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-15 01:14:53,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:14:53,402 INFO L225 Difference]: With dead ends: 109 [2020-09-15 01:14:53,403 INFO L226 Difference]: Without dead ends: 101 [2020-09-15 01:14:53,403 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=733, Invalid=1817, Unknown=0, NotChecked=0, Total=2550 [2020-09-15 01:14:53,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-15 01:14:53,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79. [2020-09-15 01:14:53,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-15 01:14:53,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 201 transitions. [2020-09-15 01:14:53,406 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 201 transitions. Word has length 23 [2020-09-15 01:14:53,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:14:53,406 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 201 transitions. [2020-09-15 01:14:53,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 01:14:53,406 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 201 transitions. [2020-09-15 01:14:53,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-15 01:14:53,406 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:14:53,406 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:14:53,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:53,607 INFO L427 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:14:53,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:14:53,608 INFO L82 PathProgramCache]: Analyzing trace with hash -768088516, now seen corresponding path program 141 times [2020-09-15 01:14:53,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:14:53,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110867704] [2020-09-15 01:14:53,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:14:53,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:54,075 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:54,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110867704] [2020-09-15 01:14:54,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829052256] [2020-09-15 01:14:54,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:54,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-15 01:14:54,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:14:54,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-15 01:14:54,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:14:54,162 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:54,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:14:54,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-15 01:14:54,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073210148] [2020-09-15 01:14:54,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 01:14:54,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:14:54,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 01:14:54,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:14:54,164 INFO L87 Difference]: Start difference. First operand 79 states and 201 transitions. Second operand 20 states. [2020-09-15 01:14:54,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:14:54,859 INFO L93 Difference]: Finished difference Result 124 states and 291 transitions. [2020-09-15 01:14:54,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-15 01:14:54,861 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-15 01:14:54,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:14:54,861 INFO L225 Difference]: With dead ends: 124 [2020-09-15 01:14:54,862 INFO L226 Difference]: Without dead ends: 118 [2020-09-15 01:14:54,862 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=405, Invalid=927, Unknown=0, NotChecked=0, Total=1332 [2020-09-15 01:14:54,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-15 01:14:54,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 81. [2020-09-15 01:14:54,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-15 01:14:54,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-15 01:14:54,866 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-15 01:14:54,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:14:54,866 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-15 01:14:54,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 01:14:54,866 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-15 01:14:54,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-15 01:14:54,867 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:14:54,867 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:14:55,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:55,070 INFO L427 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:14:55,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:14:55,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1578637152, now seen corresponding path program 142 times [2020-09-15 01:14:55,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:14:55,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213471701] [2020-09-15 01:14:55,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:14:55,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:55,455 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:55,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213471701] [2020-09-15 01:14:55,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268253014] [2020-09-15 01:14:55,456 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:55,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:14:55,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:14:55,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-15 01:14:55,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:14:55,557 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:14:55,571 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:55,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:14:55,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-15 01:14:55,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339460317] [2020-09-15 01:14:55,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-15 01:14:55,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:14:55,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-15 01:14:55,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:14:55,573 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-15 01:14:56,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:14:56,299 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-09-15 01:14:56,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-15 01:14:56,300 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-15 01:14:56,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:14:56,301 INFO L225 Difference]: With dead ends: 121 [2020-09-15 01:14:56,301 INFO L226 Difference]: Without dead ends: 115 [2020-09-15 01:14:56,301 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=449, Invalid=1111, Unknown=0, NotChecked=0, Total=1560 [2020-09-15 01:14:56,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-15 01:14:56,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 80. [2020-09-15 01:14:56,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-15 01:14:56,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-15 01:14:56,303 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-15 01:14:56,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:14:56,303 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-15 01:14:56,303 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-15 01:14:56,304 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-15 01:14:56,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-15 01:14:56,304 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:14:56,304 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:14:56,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:56,505 INFO L427 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:14:56,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:14:56,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1526360546, now seen corresponding path program 143 times [2020-09-15 01:14:56,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:14:56,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126053176] [2020-09-15 01:14:56,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:14:56,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:56,925 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:56,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126053176] [2020-09-15 01:14:56,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645788925] [2020-09-15 01:14:56,926 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:56,996 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-15 01:14:56,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:14:56,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-15 01:14:56,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:14:57,023 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:57,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:14:57,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-15 01:14:57,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207872569] [2020-09-15 01:14:57,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 01:14:57,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:14:57,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 01:14:57,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:14:57,025 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-15 01:14:57,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:14:57,781 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-09-15 01:14:57,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-15 01:14:57,782 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-15 01:14:57,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:14:57,783 INFO L225 Difference]: With dead ends: 118 [2020-09-15 01:14:57,783 INFO L226 Difference]: Without dead ends: 112 [2020-09-15 01:14:57,783 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=414, Invalid=1068, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 01:14:57,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-15 01:14:57,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 81. [2020-09-15 01:14:57,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-15 01:14:57,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-15 01:14:57,785 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-15 01:14:57,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:14:57,786 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-15 01:14:57,786 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 01:14:57,786 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-15 01:14:57,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-15 01:14:57,786 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:14:57,786 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:14:57,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:57,987 INFO L427 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:14:57,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:14:57,988 INFO L82 PathProgramCache]: Analyzing trace with hash 349888898, now seen corresponding path program 144 times [2020-09-15 01:14:57,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:14:57,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241614654] [2020-09-15 01:14:57,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:14:57,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:58,372 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:58,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241614654] [2020-09-15 01:14:58,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589480029] [2020-09-15 01:14:58,373 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:58,443 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-15 01:14:58,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:14:58,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-15 01:14:58,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:14:58,477 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:14:58,493 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:58,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:14:58,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-15 01:14:58,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110322738] [2020-09-15 01:14:58,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-15 01:14:58,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:14:58,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-15 01:14:58,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:14:58,495 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-15 01:14:59,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:14:59,405 INFO L93 Difference]: Finished difference Result 117 states and 277 transitions. [2020-09-15 01:14:59,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-15 01:14:59,406 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-15 01:14:59,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:14:59,407 INFO L225 Difference]: With dead ends: 117 [2020-09-15 01:14:59,407 INFO L226 Difference]: Without dead ends: 111 [2020-09-15 01:14:59,408 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2020-09-15 01:14:59,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-15 01:14:59,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 80. [2020-09-15 01:14:59,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-15 01:14:59,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-15 01:14:59,410 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-15 01:14:59,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:14:59,410 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-15 01:14:59,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-15 01:14:59,411 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-15 01:14:59,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-15 01:14:59,411 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:14:59,411 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:14:59,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-09-15 01:14:59,612 INFO L427 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:14:59,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:14:59,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1038210688, now seen corresponding path program 145 times [2020-09-15 01:14:59,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:14:59,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524358811] [2020-09-15 01:14:59,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:14:59,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:59,978 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:59,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524358811] [2020-09-15 01:14:59,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586082532] [2020-09-15 01:14:59,979 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:00,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:15:00,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-15 01:15:00,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:15:00,061 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:00,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:15:00,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-15 01:15:00,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955572268] [2020-09-15 01:15:00,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 01:15:00,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:15:00,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 01:15:00,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:15:00,063 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-15 01:15:00,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:15:00,919 INFO L93 Difference]: Finished difference Result 114 states and 271 transitions. [2020-09-15 01:15:00,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-15 01:15:00,920 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-15 01:15:00,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:15:00,921 INFO L225 Difference]: With dead ends: 114 [2020-09-15 01:15:00,921 INFO L226 Difference]: Without dead ends: 108 [2020-09-15 01:15:00,921 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=439, Invalid=1201, Unknown=0, NotChecked=0, Total=1640 [2020-09-15 01:15:00,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-15 01:15:00,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 81. [2020-09-15 01:15:00,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-15 01:15:00,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-15 01:15:00,923 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-15 01:15:00,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:15:00,924 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-15 01:15:00,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 01:15:00,924 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-15 01:15:00,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-15 01:15:00,924 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:15:00,924 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:15:01,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-09-15 01:15:01,127 INFO L427 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:15:01,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:15:01,128 INFO L82 PathProgramCache]: Analyzing trace with hash 2023402212, now seen corresponding path program 146 times [2020-09-15 01:15:01,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:15:01,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328007910] [2020-09-15 01:15:01,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:15:01,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:15:01,482 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:01,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328007910] [2020-09-15 01:15:01,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550610206] [2020-09-15 01:15:01,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:01,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:15:01,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:15:01,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-15 01:15:01,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:15:01,590 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:15:01,606 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:01,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:15:01,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-15 01:15:01,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388630397] [2020-09-15 01:15:01,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-15 01:15:01,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:15:01,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-15 01:15:01,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:15:01,607 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-15 01:15:02,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:15:02,648 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-09-15 01:15:02,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-15 01:15:02,650 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-15 01:15:02,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:15:02,651 INFO L225 Difference]: With dead ends: 113 [2020-09-15 01:15:02,651 INFO L226 Difference]: Without dead ends: 107 [2020-09-15 01:15:02,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=497, Invalid=1395, Unknown=0, NotChecked=0, Total=1892 [2020-09-15 01:15:02,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-15 01:15:02,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2020-09-15 01:15:02,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-15 01:15:02,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-15 01:15:02,654 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-15 01:15:02,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:15:02,654 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-15 01:15:02,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-15 01:15:02,654 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-15 01:15:02,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-15 01:15:02,655 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:15:02,655 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:15:02,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-09-15 01:15:02,864 INFO L427 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:15:02,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:15:02,864 INFO L82 PathProgramCache]: Analyzing trace with hash 406243170, now seen corresponding path program 147 times [2020-09-15 01:15:02,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:15:02,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407103360] [2020-09-15 01:15:02,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:15:02,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:15:03,209 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:03,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407103360] [2020-09-15 01:15:03,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347504129] [2020-09-15 01:15:03,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:03,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-15 01:15:03,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:15:03,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-15 01:15:03,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:15:03,300 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:03,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:15:03,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-15 01:15:03,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962938937] [2020-09-15 01:15:03,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 01:15:03,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:15:03,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 01:15:03,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:15:03,302 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-15 01:15:04,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:15:04,204 INFO L93 Difference]: Finished difference Result 110 states and 263 transitions. [2020-09-15 01:15:04,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-15 01:15:04,205 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-15 01:15:04,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:15:04,206 INFO L225 Difference]: With dead ends: 110 [2020-09-15 01:15:04,207 INFO L226 Difference]: Without dead ends: 104 [2020-09-15 01:15:04,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=480, Invalid=1326, Unknown=0, NotChecked=0, Total=1806 [2020-09-15 01:15:04,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-09-15 01:15:04,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 81. [2020-09-15 01:15:04,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-15 01:15:04,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-15 01:15:04,209 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-15 01:15:04,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:15:04,209 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-15 01:15:04,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 01:15:04,209 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-15 01:15:04,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-15 01:15:04,209 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:15:04,209 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:15:04,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-09-15 01:15:04,410 INFO L427 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:15:04,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:15:04,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1663132870, now seen corresponding path program 148 times [2020-09-15 01:15:04,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:15:04,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088014705] [2020-09-15 01:15:04,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:15:04,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:15:04,758 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:04,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088014705] [2020-09-15 01:15:04,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975091481] [2020-09-15 01:15:04,759 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:04,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:15:04,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:15:04,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-15 01:15:04,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:15:04,858 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:15:04,875 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:04,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:15:04,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-15 01:15:04,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815298380] [2020-09-15 01:15:04,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-15 01:15:04,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:15:04,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-15 01:15:04,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:15:04,877 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-15 01:15:06,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:15:06,057 INFO L93 Difference]: Finished difference Result 109 states and 261 transitions. [2020-09-15 01:15:06,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 01:15:06,059 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-15 01:15:06,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:15:06,060 INFO L225 Difference]: With dead ends: 109 [2020-09-15 01:15:06,060 INFO L226 Difference]: Without dead ends: 103 [2020-09-15 01:15:06,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=545, Invalid=1525, Unknown=0, NotChecked=0, Total=2070 [2020-09-15 01:15:06,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-15 01:15:06,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2020-09-15 01:15:06,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-15 01:15:06,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-15 01:15:06,063 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-15 01:15:06,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:15:06,063 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-15 01:15:06,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-15 01:15:06,063 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-15 01:15:06,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-15 01:15:06,063 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:15:06,063 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:15:06,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:06,264 INFO L427 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:15:06,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:15:06,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1015641916, now seen corresponding path program 149 times [2020-09-15 01:15:06,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:15:06,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702929507] [2020-09-15 01:15:06,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:15:06,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:15:06,599 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:06,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702929507] [2020-09-15 01:15:06,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299441465] [2020-09-15 01:15:06,600 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:06,668 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-15 01:15:06,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:15:06,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-15 01:15:06,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:15:06,708 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:06,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:15:06,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-15 01:15:06,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455358799] [2020-09-15 01:15:06,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 01:15:06,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:15:06,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 01:15:06,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:15:06,710 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-15 01:15:07,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:15:07,838 INFO L93 Difference]: Finished difference Result 106 states and 255 transitions. [2020-09-15 01:15:07,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-15 01:15:07,840 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-15 01:15:07,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:15:07,840 INFO L225 Difference]: With dead ends: 106 [2020-09-15 01:15:07,840 INFO L226 Difference]: Without dead ends: 100 [2020-09-15 01:15:07,841 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=537, Invalid=1443, Unknown=0, NotChecked=0, Total=1980 [2020-09-15 01:15:07,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-15 01:15:07,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2020-09-15 01:15:07,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-15 01:15:07,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-15 01:15:07,843 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-15 01:15:07,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:15:07,843 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-15 01:15:07,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 01:15:07,843 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-15 01:15:07,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-15 01:15:07,844 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:15:07,844 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:15:08,045 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2020-09-15 01:15:08,045 INFO L427 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:15:08,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:15:08,045 INFO L82 PathProgramCache]: Analyzing trace with hash -495898840, now seen corresponding path program 150 times [2020-09-15 01:15:08,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:15:08,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476406656] [2020-09-15 01:15:08,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:15:08,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:15:08,367 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:08,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476406656] [2020-09-15 01:15:08,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042412940] [2020-09-15 01:15:08,368 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:08,444 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-15 01:15:08,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:15:08,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-15 01:15:08,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:15:08,491 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:15:08,515 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:08,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:15:08,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-15 01:15:08,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866870900] [2020-09-15 01:15:08,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-15 01:15:08,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:15:08,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-15 01:15:08,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:15:08,517 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-15 01:15:09,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:15:09,811 INFO L93 Difference]: Finished difference Result 105 states and 253 transitions. [2020-09-15 01:15:09,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 01:15:09,812 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-15 01:15:09,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:15:09,813 INFO L225 Difference]: With dead ends: 105 [2020-09-15 01:15:09,813 INFO L226 Difference]: Without dead ends: 99 [2020-09-15 01:15:09,813 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=609, Invalid=1647, Unknown=0, NotChecked=0, Total=2256 [2020-09-15 01:15:09,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-15 01:15:09,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 80. [2020-09-15 01:15:09,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-15 01:15:09,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-15 01:15:09,815 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-15 01:15:09,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:15:09,816 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-15 01:15:09,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-15 01:15:09,816 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-15 01:15:09,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-15 01:15:09,816 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:15:09,816 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:15:10,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:10,017 INFO L427 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:15:10,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:15:10,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1159412390, now seen corresponding path program 151 times [2020-09-15 01:15:10,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:15:10,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506294631] [2020-09-15 01:15:10,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:15:10,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:15:10,328 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:10,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506294631] [2020-09-15 01:15:10,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255630277] [2020-09-15 01:15:10,329 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:10,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:15:10,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-15 01:15:10,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:15:10,425 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:10,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:15:10,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-15 01:15:10,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826669702] [2020-09-15 01:15:10,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 01:15:10,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:15:10,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 01:15:10,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:15:10,427 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-15 01:15:11,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:15:11,508 INFO L93 Difference]: Finished difference Result 102 states and 247 transitions. [2020-09-15 01:15:11,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-15 01:15:11,510 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-15 01:15:11,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:15:11,511 INFO L225 Difference]: With dead ends: 102 [2020-09-15 01:15:11,511 INFO L226 Difference]: Without dead ends: 96 [2020-09-15 01:15:11,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=610, Invalid=1552, Unknown=0, NotChecked=0, Total=2162 [2020-09-15 01:15:11,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-15 01:15:11,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2020-09-15 01:15:11,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-15 01:15:11,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-15 01:15:11,513 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-15 01:15:11,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:15:11,514 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-15 01:15:11,514 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 01:15:11,514 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-15 01:15:11,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-15 01:15:11,514 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:15:11,514 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:15:11,715 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:11,715 INFO L427 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:15:11,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:15:11,716 INFO L82 PathProgramCache]: Analyzing trace with hash -560715254, now seen corresponding path program 152 times [2020-09-15 01:15:11,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:15:11,717 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688424895] [2020-09-15 01:15:11,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:15:11,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:15:12,182 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:12,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688424895] [2020-09-15 01:15:12,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185470617] [2020-09-15 01:15:12,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:12,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:15:12,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:15:12,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-15 01:15:12,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:15:12,302 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:15:12,327 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:12,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:15:12,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-15 01:15:12,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398563685] [2020-09-15 01:15:12,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-15 01:15:12,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:15:12,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-15 01:15:12,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:15:12,329 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-15 01:15:13,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:15:13,809 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-09-15 01:15:13,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-15 01:15:13,810 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-15 01:15:13,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:15:13,811 INFO L225 Difference]: With dead ends: 101 [2020-09-15 01:15:13,811 INFO L226 Difference]: Without dead ends: 95 [2020-09-15 01:15:13,811 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=689, Invalid=1761, Unknown=0, NotChecked=0, Total=2450 [2020-09-15 01:15:13,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-15 01:15:13,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80. [2020-09-15 01:15:13,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-15 01:15:13,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-15 01:15:13,813 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-15 01:15:13,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:15:13,814 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-15 01:15:13,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-15 01:15:13,814 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-15 01:15:13,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-15 01:15:13,814 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:15:13,814 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:15:14,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable153 [2020-09-15 01:15:14,016 INFO L427 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:15:14,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:15:14,017 INFO L82 PathProgramCache]: Analyzing trace with hash -89719544, now seen corresponding path program 153 times [2020-09-15 01:15:14,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:15:14,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339690738] [2020-09-15 01:15:14,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:15:14,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:15:14,354 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:14,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339690738] [2020-09-15 01:15:14,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420693314] [2020-09-15 01:15:14,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:14,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-15 01:15:14,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:15:14,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-15 01:15:14,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:15:14,457 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:14,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:15:14,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-15 01:15:14,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410555257] [2020-09-15 01:15:14,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 01:15:14,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:15:14,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 01:15:14,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:15:14,458 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-15 01:15:15,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:15:15,644 INFO L93 Difference]: Finished difference Result 98 states and 239 transitions. [2020-09-15 01:15:15,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-15 01:15:15,645 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-15 01:15:15,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:15:15,645 INFO L225 Difference]: With dead ends: 98 [2020-09-15 01:15:15,645 INFO L226 Difference]: Without dead ends: 92 [2020-09-15 01:15:15,646 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=699, Invalid=1653, Unknown=0, NotChecked=0, Total=2352 [2020-09-15 01:15:15,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-15 01:15:15,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2020-09-15 01:15:15,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-15 01:15:15,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-15 01:15:15,648 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-15 01:15:15,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:15:15,648 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-15 01:15:15,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 01:15:15,648 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-15 01:15:15,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-15 01:15:15,648 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:15:15,648 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:15:15,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:15,849 INFO L427 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:15:15,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:15:15,850 INFO L82 PathProgramCache]: Analyzing trace with hash -73632404, now seen corresponding path program 154 times [2020-09-15 01:15:15,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:15:15,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887263726] [2020-09-15 01:15:15,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:15:15,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:15:16,165 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:16,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887263726] [2020-09-15 01:15:16,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126630193] [2020-09-15 01:15:16,166 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:16,229 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:15:16,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:15:16,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-15 01:15:16,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:15:16,269 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:15:16,291 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:16,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:15:16,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-15 01:15:16,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202922998] [2020-09-15 01:15:16,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-15 01:15:16,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:15:16,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-15 01:15:16,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:15:16,293 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-15 01:15:17,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:15:17,905 INFO L93 Difference]: Finished difference Result 97 states and 237 transitions. [2020-09-15 01:15:17,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-15 01:15:17,906 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-15 01:15:17,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:15:17,907 INFO L225 Difference]: With dead ends: 97 [2020-09-15 01:15:17,907 INFO L226 Difference]: Without dead ends: 91 [2020-09-15 01:15:17,907 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=785, Invalid=1867, Unknown=0, NotChecked=0, Total=2652 [2020-09-15 01:15:17,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-15 01:15:17,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2020-09-15 01:15:17,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-15 01:15:17,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-15 01:15:17,909 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-15 01:15:17,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:15:17,910 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-15 01:15:17,910 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-15 01:15:17,910 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-15 01:15:17,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-15 01:15:17,910 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:15:17,910 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:15:18,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-09-15 01:15:18,111 INFO L427 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:15:18,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:15:18,112 INFO L82 PathProgramCache]: Analyzing trace with hash -73142294, now seen corresponding path program 155 times [2020-09-15 01:15:18,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:15:18,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787261] [2020-09-15 01:15:18,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:15:18,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:15:18,425 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:18,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787261] [2020-09-15 01:15:18,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296736181] [2020-09-15 01:15:18,426 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:18,499 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-15 01:15:18,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:15:18,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-15 01:15:18,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:15:18,542 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:18,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:15:18,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-15 01:15:18,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066943707] [2020-09-15 01:15:18,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 01:15:18,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:15:18,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 01:15:18,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:15:18,544 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-15 01:15:19,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:15:19,919 INFO L93 Difference]: Finished difference Result 113 states and 277 transitions. [2020-09-15 01:15:19,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-15 01:15:19,921 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-15 01:15:19,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:15:19,921 INFO L225 Difference]: With dead ends: 113 [2020-09-15 01:15:19,922 INFO L226 Difference]: Without dead ends: 107 [2020-09-15 01:15:19,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=804, Invalid=1746, Unknown=0, NotChecked=0, Total=2550 [2020-09-15 01:15:19,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-15 01:15:19,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2020-09-15 01:15:19,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-15 01:15:19,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 217 transitions. [2020-09-15 01:15:19,925 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 217 transitions. Word has length 24 [2020-09-15 01:15:19,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:15:19,925 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 217 transitions. [2020-09-15 01:15:19,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 01:15:19,925 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 217 transitions. [2020-09-15 01:15:19,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-15 01:15:19,926 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:15:19,926 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:15:20,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-09-15 01:15:20,127 INFO L427 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:15:20,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:15:20,127 INFO L82 PathProgramCache]: Analyzing trace with hash -73125554, now seen corresponding path program 156 times [2020-09-15 01:15:20,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:15:20,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782073884] [2020-09-15 01:15:20,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:15:20,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:15:20,466 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:20,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782073884] [2020-09-15 01:15:20,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156197768] [2020-09-15 01:15:20,467 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:20,546 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-15 01:15:20,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:15:20,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-15 01:15:20,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:15:20,587 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:15:20,612 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:20,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:15:20,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-15 01:15:20,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346476295] [2020-09-15 01:15:20,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-15 01:15:20,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:15:20,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-15 01:15:20,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:15:20,614 INFO L87 Difference]: Start difference. First operand 84 states and 217 transitions. Second operand 21 states. [2020-09-15 01:15:22,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:15:22,238 INFO L93 Difference]: Finished difference Result 94 states and 233 transitions. [2020-09-15 01:15:22,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-15 01:15:22,239 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-15 01:15:22,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:15:22,240 INFO L225 Difference]: With dead ends: 94 [2020-09-15 01:15:22,240 INFO L226 Difference]: Without dead ends: 86 [2020-09-15 01:15:22,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=897, Invalid=1965, Unknown=0, NotChecked=0, Total=2862 [2020-09-15 01:15:22,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-15 01:15:22,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2020-09-15 01:15:22,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-15 01:15:22,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 148 transitions. [2020-09-15 01:15:22,243 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 148 transitions. Word has length 24 [2020-09-15 01:15:22,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:15:22,248 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 148 transitions. [2020-09-15 01:15:22,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-15 01:15:22,248 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 148 transitions. [2020-09-15 01:15:22,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-15 01:15:22,248 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:15:22,248 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:15:22,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-09-15 01:15:22,450 INFO L427 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:15:22,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:15:22,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1614805552, now seen corresponding path program 157 times [2020-09-15 01:15:22,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:15:22,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772169565] [2020-09-15 01:15:22,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:15:22,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:15:22,774 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:22,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772169565] [2020-09-15 01:15:22,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822743734] [2020-09-15 01:15:22,775 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:22,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:15:22,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-15 01:15:22,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:15:22,875 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:15:22,905 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:22,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:15:22,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-15 01:15:22,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465547594] [2020-09-15 01:15:22,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-15 01:15:22,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:15:22,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-15 01:15:22,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:15:22,906 INFO L87 Difference]: Start difference. First operand 61 states and 148 transitions. Second operand 21 states. [2020-09-15 01:15:24,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:15:24,458 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-09-15 01:15:24,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-15 01:15:24,459 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-15 01:15:24,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:15:24,459 INFO L225 Difference]: With dead ends: 108 [2020-09-15 01:15:24,459 INFO L226 Difference]: Without dead ends: 103 [2020-09-15 01:15:24,460 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=938, Invalid=1924, Unknown=0, NotChecked=0, Total=2862 [2020-09-15 01:15:24,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-15 01:15:24,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 82. [2020-09-15 01:15:24,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-15 01:15:24,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-09-15 01:15:24,462 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 24 [2020-09-15 01:15:24,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:15:24,463 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-09-15 01:15:24,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-15 01:15:24,463 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-09-15 01:15:24,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 01:15:24,463 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:15:24,463 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:15:24,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-09-15 01:15:24,664 INFO L427 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:15:24,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:15:24,665 INFO L82 PathProgramCache]: Analyzing trace with hash 2028091429, now seen corresponding path program 158 times [2020-09-15 01:15:24,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:15:24,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339444167] [2020-09-15 01:15:24,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:15:24,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:15:25,033 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:25,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339444167] [2020-09-15 01:15:25,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603833422] [2020-09-15 01:15:25,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:25,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:15:25,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:15:25,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 01:15:25,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:15:25,149 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:15:25,180 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:25,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:15:25,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-15 01:15:25,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366945920] [2020-09-15 01:15:25,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 01:15:25,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:15:25,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 01:15:25,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:15:25,182 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 22 states. [2020-09-15 01:15:26,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:15:26,881 INFO L93 Difference]: Finished difference Result 90 states and 229 transitions. [2020-09-15 01:15:26,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-15 01:15:26,882 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-15 01:15:26,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:15:26,882 INFO L225 Difference]: With dead ends: 90 [2020-09-15 01:15:26,883 INFO L226 Difference]: Without dead ends: 85 [2020-09-15 01:15:26,883 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=955, Invalid=2015, Unknown=0, NotChecked=0, Total=2970 [2020-09-15 01:15:26,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-15 01:15:26,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-09-15 01:15:26,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-15 01:15:26,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 152 transitions. [2020-09-15 01:15:26,886 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 152 transitions. Word has length 25 [2020-09-15 01:15:26,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:15:26,886 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 152 transitions. [2020-09-15 01:15:26,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 01:15:26,886 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 152 transitions. [2020-09-15 01:15:26,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 01:15:26,886 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:15:26,886 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:15:27,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:27,087 INFO L427 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:15:27,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:15:27,088 INFO L82 PathProgramCache]: Analyzing trace with hash 674366672, now seen corresponding path program 159 times [2020-09-15 01:15:27,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:15:27,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68575442] [2020-09-15 01:15:27,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:15:27,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:15:27,573 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:27,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68575442] [2020-09-15 01:15:27,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500340355] [2020-09-15 01:15:27,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:27,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-15 01:15:27,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:15:27,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 01:15:27,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:15:27,668 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:27,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:15:27,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-15 01:15:27,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356119893] [2020-09-15 01:15:27,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-15 01:15:27,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:15:27,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-15 01:15:27,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:15:27,670 INFO L87 Difference]: Start difference. First operand 62 states and 152 transitions. Second operand 21 states. [2020-09-15 01:15:28,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:15:28,431 INFO L93 Difference]: Finished difference Result 96 states and 223 transitions. [2020-09-15 01:15:28,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-15 01:15:28,432 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-15 01:15:28,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:15:28,433 INFO L225 Difference]: With dead ends: 96 [2020-09-15 01:15:28,433 INFO L226 Difference]: Without dead ends: 90 [2020-09-15 01:15:28,434 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=453, Invalid=953, Unknown=0, NotChecked=0, Total=1406 [2020-09-15 01:15:28,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-15 01:15:28,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 70. [2020-09-15 01:15:28,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-15 01:15:28,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 171 transitions. [2020-09-15 01:15:28,436 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 171 transitions. Word has length 25 [2020-09-15 01:15:28,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:15:28,436 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 171 transitions. [2020-09-15 01:15:28,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-15 01:15:28,437 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 171 transitions. [2020-09-15 01:15:28,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 01:15:28,437 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:15:28,437 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:15:28,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:28,638 INFO L427 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:15:28,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:15:28,639 INFO L82 PathProgramCache]: Analyzing trace with hash -873791948, now seen corresponding path program 160 times [2020-09-15 01:15:28,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:15:28,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902290694] [2020-09-15 01:15:28,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:15:28,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:15:29,119 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:29,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902290694] [2020-09-15 01:15:29,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237878306] [2020-09-15 01:15:29,120 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:29,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:15:29,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:15:29,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 01:15:29,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:15:29,223 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:15:29,237 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:29,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:15:29,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-15 01:15:29,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965850613] [2020-09-15 01:15:29,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 01:15:29,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:15:29,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 01:15:29,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:15:29,239 INFO L87 Difference]: Start difference. First operand 70 states and 171 transitions. Second operand 22 states. [2020-09-15 01:15:30,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:15:30,085 INFO L93 Difference]: Finished difference Result 114 states and 259 transitions. [2020-09-15 01:15:30,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-15 01:15:30,086 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-15 01:15:30,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:15:30,087 INFO L225 Difference]: With dead ends: 114 [2020-09-15 01:15:30,087 INFO L226 Difference]: Without dead ends: 108 [2020-09-15 01:15:30,088 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=462, Invalid=1098, Unknown=0, NotChecked=0, Total=1560 [2020-09-15 01:15:30,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-15 01:15:30,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 68. [2020-09-15 01:15:30,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-15 01:15:30,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 167 transitions. [2020-09-15 01:15:30,090 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 167 transitions. Word has length 25 [2020-09-15 01:15:30,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:15:30,091 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 167 transitions. [2020-09-15 01:15:30,091 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 01:15:30,091 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 167 transitions. [2020-09-15 01:15:30,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 01:15:30,091 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:15:30,091 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:15:30,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:30,299 INFO L427 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:15:30,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:15:30,300 INFO L82 PathProgramCache]: Analyzing trace with hash 2119386162, now seen corresponding path program 161 times [2020-09-15 01:15:30,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:15:30,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710217252] [2020-09-15 01:15:30,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:15:30,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:15:30,747 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:30,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710217252] [2020-09-15 01:15:30,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107965304] [2020-09-15 01:15:30,748 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:30,818 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-15 01:15:30,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:15:30,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 01:15:30,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:15:30,835 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:30,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:15:30,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-15 01:15:30,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245464088] [2020-09-15 01:15:30,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-15 01:15:30,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:15:30,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-15 01:15:30,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:15:30,837 INFO L87 Difference]: Start difference. First operand 68 states and 167 transitions. Second operand 21 states. [2020-09-15 01:15:31,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:15:31,686 INFO L93 Difference]: Finished difference Result 115 states and 263 transitions. [2020-09-15 01:15:31,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-15 01:15:31,687 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-15 01:15:31,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:15:31,688 INFO L225 Difference]: With dead ends: 115 [2020-09-15 01:15:31,688 INFO L226 Difference]: Without dead ends: 109 [2020-09-15 01:15:31,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=466, Invalid=1174, Unknown=0, NotChecked=0, Total=1640 [2020-09-15 01:15:31,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-15 01:15:31,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 71. [2020-09-15 01:15:31,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-15 01:15:31,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 175 transitions. [2020-09-15 01:15:31,690 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 175 transitions. Word has length 25 [2020-09-15 01:15:31,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:15:31,690 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 175 transitions. [2020-09-15 01:15:31,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-15 01:15:31,691 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 175 transitions. [2020-09-15 01:15:31,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 01:15:31,691 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:15:31,691 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:15:31,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:31,892 INFO L427 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:15:31,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:15:31,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1308837526, now seen corresponding path program 162 times [2020-09-15 01:15:31,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:15:31,893 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950521956] [2020-09-15 01:15:31,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:15:31,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:15:32,332 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:32,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950521956] [2020-09-15 01:15:32,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696500533] [2020-09-15 01:15:32,333 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:32,396 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-15 01:15:32,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:15:32,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 01:15:32,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:15:32,430 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:15:32,453 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:32,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:15:32,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-15 01:15:32,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371169548] [2020-09-15 01:15:32,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 01:15:32,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:15:32,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 01:15:32,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:15:32,454 INFO L87 Difference]: Start difference. First operand 71 states and 175 transitions. Second operand 22 states. [2020-09-15 01:15:33,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:15:33,400 INFO L93 Difference]: Finished difference Result 129 states and 291 transitions. [2020-09-15 01:15:33,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-15 01:15:33,402 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-15 01:15:33,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:15:33,402 INFO L225 Difference]: With dead ends: 129 [2020-09-15 01:15:33,403 INFO L226 Difference]: Without dead ends: 123 [2020-09-15 01:15:33,403 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=500, Invalid=1306, Unknown=0, NotChecked=0, Total=1806 [2020-09-15 01:15:33,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-15 01:15:33,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 70. [2020-09-15 01:15:33,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-15 01:15:33,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 173 transitions. [2020-09-15 01:15:33,406 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 173 transitions. Word has length 25 [2020-09-15 01:15:33,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:15:33,406 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 173 transitions. [2020-09-15 01:15:33,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 01:15:33,406 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 173 transitions. [2020-09-15 01:15:33,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 01:15:33,407 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:15:33,407 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:15:33,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:33,610 INFO L427 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:15:33,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:15:33,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1361114132, now seen corresponding path program 163 times [2020-09-15 01:15:33,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:15:33,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735781005] [2020-09-15 01:15:33,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:15:33,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:15:34,065 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:34,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735781005] [2020-09-15 01:15:34,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111774648] [2020-09-15 01:15:34,066 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:34,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:15:34,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 01:15:34,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:15:34,149 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:34,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:15:34,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-15 01:15:34,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524190198] [2020-09-15 01:15:34,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-15 01:15:34,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:15:34,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-15 01:15:34,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:15:34,151 INFO L87 Difference]: Start difference. First operand 70 states and 173 transitions. Second operand 21 states. [2020-09-15 01:15:35,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:15:35,080 INFO L93 Difference]: Finished difference Result 129 states and 293 transitions. [2020-09-15 01:15:35,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-15 01:15:35,082 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-15 01:15:35,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:15:35,083 INFO L225 Difference]: With dead ends: 129 [2020-09-15 01:15:35,083 INFO L226 Difference]: Without dead ends: 123 [2020-09-15 01:15:35,083 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=518, Invalid=1374, Unknown=0, NotChecked=0, Total=1892 [2020-09-15 01:15:35,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-15 01:15:35,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 73. [2020-09-15 01:15:35,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-15 01:15:35,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 181 transitions. [2020-09-15 01:15:35,086 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 181 transitions. Word has length 25 [2020-09-15 01:15:35,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:15:35,086 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 181 transitions. [2020-09-15 01:15:35,086 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-15 01:15:35,086 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 181 transitions. [2020-09-15 01:15:35,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 01:15:35,086 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:15:35,086 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:15:35,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:35,287 INFO L427 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:15:35,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:15:35,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1057603720, now seen corresponding path program 164 times [2020-09-15 01:15:35,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:15:35,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721386661] [2020-09-15 01:15:35,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:15:35,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:15:35,745 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:35,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721386661] [2020-09-15 01:15:35,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486864258] [2020-09-15 01:15:35,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:35,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:15:35,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:15:35,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 01:15:35,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:15:35,849 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:15:35,866 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:35,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:15:35,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-15 01:15:35,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998869844] [2020-09-15 01:15:35,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 01:15:35,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:15:35,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 01:15:35,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:15:35,873 INFO L87 Difference]: Start difference. First operand 73 states and 181 transitions. Second operand 22 states. [2020-09-15 01:15:37,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:15:37,010 INFO L93 Difference]: Finished difference Result 126 states and 287 transitions. [2020-09-15 01:15:37,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-15 01:15:37,011 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-15 01:15:37,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:15:37,012 INFO L225 Difference]: With dead ends: 126 [2020-09-15 01:15:37,012 INFO L226 Difference]: Without dead ends: 120 [2020-09-15 01:15:37,012 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=523, Invalid=1457, Unknown=0, NotChecked=0, Total=1980 [2020-09-15 01:15:37,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-15 01:15:37,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 72. [2020-09-15 01:15:37,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-15 01:15:37,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 179 transitions. [2020-09-15 01:15:37,015 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 179 transitions. Word has length 25 [2020-09-15 01:15:37,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:15:37,015 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 179 transitions. [2020-09-15 01:15:37,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 01:15:37,015 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 179 transitions. [2020-09-15 01:15:37,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 01:15:37,016 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:15:37,016 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:15:37,221 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:37,221 INFO L427 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:15:37,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:15:37,222 INFO L82 PathProgramCache]: Analyzing trace with hash -369281930, now seen corresponding path program 165 times [2020-09-15 01:15:37,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:15:37,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272864887] [2020-09-15 01:15:37,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:15:37,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:15:37,639 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:37,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272864887] [2020-09-15 01:15:37,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124079085] [2020-09-15 01:15:37,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:37,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-15 01:15:37,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:15:37,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 01:15:37,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:15:37,735 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:37,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:15:37,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-15 01:15:37,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210000270] [2020-09-15 01:15:37,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-15 01:15:37,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:15:37,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-15 01:15:37,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:15:37,736 INFO L87 Difference]: Start difference. First operand 72 states and 179 transitions. Second operand 21 states. [2020-09-15 01:15:38,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:15:38,856 INFO L93 Difference]: Finished difference Result 127 states and 291 transitions. [2020-09-15 01:15:38,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-15 01:15:38,858 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-15 01:15:38,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:15:38,858 INFO L225 Difference]: With dead ends: 127 [2020-09-15 01:15:38,859 INFO L226 Difference]: Without dead ends: 121 [2020-09-15 01:15:38,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=556, Invalid=1514, Unknown=0, NotChecked=0, Total=2070 [2020-09-15 01:15:38,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-15 01:15:38,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 75. [2020-09-15 01:15:38,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-15 01:15:38,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 187 transitions. [2020-09-15 01:15:38,862 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 187 transitions. Word has length 25 [2020-09-15 01:15:38,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:15:38,862 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 187 transitions. [2020-09-15 01:15:38,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-15 01:15:38,862 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 187 transitions. [2020-09-15 01:15:38,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 01:15:38,862 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:15:38,862 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:15:39,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-09-15 01:15:39,064 INFO L427 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:15:39,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:15:39,064 INFO L82 PathProgramCache]: Analyzing trace with hash 615909594, now seen corresponding path program 166 times [2020-09-15 01:15:39,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:15:39,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296833440] [2020-09-15 01:15:39,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:15:39,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:15:39,515 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:39,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296833440] [2020-09-15 01:15:39,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820784276] [2020-09-15 01:15:39,517 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:39,584 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:15:39,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:15:39,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 01:15:39,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:15:39,622 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:15:39,644 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:39,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:15:39,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-15 01:15:39,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71926247] [2020-09-15 01:15:39,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 01:15:39,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:15:39,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 01:15:39,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:15:39,646 INFO L87 Difference]: Start difference. First operand 75 states and 187 transitions. Second operand 22 states. [2020-09-15 01:15:40,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:15:40,884 INFO L93 Difference]: Finished difference Result 124 states and 285 transitions. [2020-09-15 01:15:40,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 01:15:40,886 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-15 01:15:40,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:15:40,886 INFO L225 Difference]: With dead ends: 124 [2020-09-15 01:15:40,886 INFO L226 Difference]: Without dead ends: 118 [2020-09-15 01:15:40,886 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=562, Invalid=1600, Unknown=0, NotChecked=0, Total=2162 [2020-09-15 01:15:40,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-15 01:15:40,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 74. [2020-09-15 01:15:40,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-15 01:15:40,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions. [2020-09-15 01:15:40,888 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 25 [2020-09-15 01:15:40,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:15:40,889 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 185 transitions. [2020-09-15 01:15:40,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 01:15:40,889 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions. [2020-09-15 01:15:40,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 01:15:40,889 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:15:40,889 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:15:41,090 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-09-15 01:15:41,090 INFO L427 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:15:41,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:15:41,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1001249448, now seen corresponding path program 167 times [2020-09-15 01:15:41,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:15:41,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982002349] [2020-09-15 01:15:41,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:15:41,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:15:41,463 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:41,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982002349] [2020-09-15 01:15:41,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224102512] [2020-09-15 01:15:41,464 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:41,534 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-15 01:15:41,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:15:41,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 01:15:41,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:15:41,559 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:41,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:15:41,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-15 01:15:41,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934848136] [2020-09-15 01:15:41,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-15 01:15:41,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:15:41,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-15 01:15:41,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:15:41,561 INFO L87 Difference]: Start difference. First operand 74 states and 185 transitions. Second operand 21 states. [2020-09-15 01:15:42,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:15:42,751 INFO L93 Difference]: Finished difference Result 125 states and 289 transitions. [2020-09-15 01:15:42,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-15 01:15:42,753 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-15 01:15:42,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:15:42,754 INFO L225 Difference]: With dead ends: 125 [2020-09-15 01:15:42,754 INFO L226 Difference]: Without dead ends: 119 [2020-09-15 01:15:42,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=610, Invalid=1646, Unknown=0, NotChecked=0, Total=2256 [2020-09-15 01:15:42,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-15 01:15:42,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 77. [2020-09-15 01:15:42,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-15 01:15:42,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 193 transitions. [2020-09-15 01:15:42,762 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 193 transitions. Word has length 25 [2020-09-15 01:15:42,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:15:42,762 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 193 transitions. [2020-09-15 01:15:42,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-15 01:15:42,762 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 193 transitions. [2020-09-15 01:15:42,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 01:15:42,763 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:15:42,763 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:15:42,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-09-15 01:15:42,964 INFO L427 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:15:42,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:15:42,965 INFO L82 PathProgramCache]: Analyzing trace with hash 255640252, now seen corresponding path program 168 times [2020-09-15 01:15:42,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:15:42,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614930356] [2020-09-15 01:15:42,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:15:42,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:15:43,387 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:43,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614930356] [2020-09-15 01:15:43,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164206695] [2020-09-15 01:15:43,389 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:43,465 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-15 01:15:43,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:15:43,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 01:15:43,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:15:43,507 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:15:43,530 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:43,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:15:43,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-15 01:15:43,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421542117] [2020-09-15 01:15:43,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 01:15:43,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:15:43,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 01:15:43,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:15:43,531 INFO L87 Difference]: Start difference. First operand 77 states and 193 transitions. Second operand 22 states. [2020-09-15 01:15:44,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:15:44,881 INFO L93 Difference]: Finished difference Result 122 states and 283 transitions. [2020-09-15 01:15:44,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 01:15:44,883 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-15 01:15:44,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:15:44,884 INFO L225 Difference]: With dead ends: 122 [2020-09-15 01:15:44,884 INFO L226 Difference]: Without dead ends: 116 [2020-09-15 01:15:44,884 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=617, Invalid=1735, Unknown=0, NotChecked=0, Total=2352 [2020-09-15 01:15:44,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-09-15 01:15:44,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2020-09-15 01:15:44,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-15 01:15:44,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 191 transitions. [2020-09-15 01:15:44,886 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 191 transitions. Word has length 25 [2020-09-15 01:15:44,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:15:44,886 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 191 transitions. [2020-09-15 01:15:44,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 01:15:44,886 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 191 transitions. [2020-09-15 01:15:44,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 01:15:44,887 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:15:44,887 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:15:45,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-09-15 01:15:45,088 INFO L427 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:15:45,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:15:45,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1871832762, now seen corresponding path program 169 times [2020-09-15 01:15:45,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:15:45,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875702143] [2020-09-15 01:15:45,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:15:45,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:15:45,480 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:45,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875702143] [2020-09-15 01:15:45,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972229908] [2020-09-15 01:15:45,481 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:45,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:15:45,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 01:15:45,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:15:45,583 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:45,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:15:45,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-15 01:15:45,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307958227] [2020-09-15 01:15:45,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-15 01:15:45,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:15:45,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-15 01:15:45,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:15:45,585 INFO L87 Difference]: Start difference. First operand 76 states and 191 transitions. Second operand 21 states. [2020-09-15 01:15:46,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:15:46,924 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-09-15 01:15:46,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-15 01:15:46,926 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-15 01:15:46,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:15:46,927 INFO L225 Difference]: With dead ends: 123 [2020-09-15 01:15:46,927 INFO L226 Difference]: Without dead ends: 117 [2020-09-15 01:15:46,927 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=680, Invalid=1770, Unknown=0, NotChecked=0, Total=2450 [2020-09-15 01:15:46,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-15 01:15:46,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 79. [2020-09-15 01:15:46,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-15 01:15:46,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 199 transitions. [2020-09-15 01:15:46,930 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 199 transitions. Word has length 25 [2020-09-15 01:15:46,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:15:46,930 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 199 transitions. [2020-09-15 01:15:46,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-15 01:15:46,930 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 199 transitions. [2020-09-15 01:15:46,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 01:15:46,931 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:15:46,931 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:15:47,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:47,132 INFO L427 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:15:47,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:15:47,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1903391458, now seen corresponding path program 170 times [2020-09-15 01:15:47,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:15:47,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871238887] [2020-09-15 01:15:47,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:15:47,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:15:47,546 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:47,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871238887] [2020-09-15 01:15:47,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279252297] [2020-09-15 01:15:47,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:47,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:15:47,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:15:47,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 01:15:47,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:15:47,662 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:15:47,685 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:47,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:15:47,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-15 01:15:47,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079206555] [2020-09-15 01:15:47,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 01:15:47,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:15:47,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 01:15:47,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:15:47,686 INFO L87 Difference]: Start difference. First operand 79 states and 199 transitions. Second operand 22 states. [2020-09-15 01:15:49,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:15:49,292 INFO L93 Difference]: Finished difference Result 120 states and 281 transitions. [2020-09-15 01:15:49,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-15 01:15:49,293 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-15 01:15:49,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:15:49,293 INFO L225 Difference]: With dead ends: 120 [2020-09-15 01:15:49,293 INFO L226 Difference]: Without dead ends: 114 [2020-09-15 01:15:49,294 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=688, Invalid=1862, Unknown=0, NotChecked=0, Total=2550 [2020-09-15 01:15:49,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-15 01:15:49,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 78. [2020-09-15 01:15:49,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-15 01:15:49,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 197 transitions. [2020-09-15 01:15:49,296 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 197 transitions. Word has length 25 [2020-09-15 01:15:49,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:15:49,296 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 197 transitions. [2020-09-15 01:15:49,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 01:15:49,296 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 197 transitions. [2020-09-15 01:15:49,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 01:15:49,297 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:15:49,297 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:15:49,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:49,498 INFO L427 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:15:49,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:15:49,498 INFO L82 PathProgramCache]: Analyzing trace with hash -248080228, now seen corresponding path program 171 times [2020-09-15 01:15:49,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:15:49,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287936296] [2020-09-15 01:15:49,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:15:49,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:15:49,845 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:49,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287936296] [2020-09-15 01:15:49,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657135410] [2020-09-15 01:15:49,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:49,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-15 01:15:49,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:15:49,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 01:15:49,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:15:49,946 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:49,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:15:49,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-15 01:15:49,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173577524] [2020-09-15 01:15:49,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-15 01:15:49,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:15:49,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-15 01:15:49,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:15:49,947 INFO L87 Difference]: Start difference. First operand 78 states and 197 transitions. Second operand 21 states. [2020-09-15 01:15:51,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:15:51,303 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-09-15 01:15:51,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-15 01:15:51,304 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-15 01:15:51,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:15:51,305 INFO L225 Difference]: With dead ends: 121 [2020-09-15 01:15:51,305 INFO L226 Difference]: Without dead ends: 115 [2020-09-15 01:15:51,306 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=766, Invalid=1886, Unknown=0, NotChecked=0, Total=2652 [2020-09-15 01:15:51,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-15 01:15:51,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 81. [2020-09-15 01:15:51,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-15 01:15:51,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-15 01:15:51,308 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 25 [2020-09-15 01:15:51,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:15:51,308 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-15 01:15:51,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-15 01:15:51,308 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-15 01:15:51,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 01:15:51,308 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:15:51,308 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:15:51,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2020-09-15 01:15:51,509 INFO L427 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:15:51,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:15:51,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1968207872, now seen corresponding path program 172 times [2020-09-15 01:15:51,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:15:51,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337370893] [2020-09-15 01:15:51,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:15:51,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:15:51,868 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:51,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337370893] [2020-09-15 01:15:51,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743593569] [2020-09-15 01:15:51,869 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:51,933 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:15:51,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:15:51,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 01:15:51,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:15:51,972 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:15:52,004 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:52,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:15:52,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-15 01:15:52,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129394883] [2020-09-15 01:15:52,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 01:15:52,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:15:52,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 01:15:52,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:15:52,006 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 22 states. [2020-09-15 01:15:53,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:15:53,689 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-09-15 01:15:53,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-15 01:15:53,691 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-15 01:15:53,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:15:53,692 INFO L225 Difference]: With dead ends: 118 [2020-09-15 01:15:53,692 INFO L226 Difference]: Without dead ends: 112 [2020-09-15 01:15:53,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=775, Invalid=1981, Unknown=0, NotChecked=0, Total=2756 [2020-09-15 01:15:53,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-15 01:15:53,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 80. [2020-09-15 01:15:53,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-15 01:15:53,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-15 01:15:53,695 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 25 [2020-09-15 01:15:53,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:15:53,695 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-15 01:15:53,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 01:15:53,695 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-15 01:15:53,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 01:15:53,695 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:15:53,696 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:15:53,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:53,897 INFO L427 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:15:53,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:15:53,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1497212162, now seen corresponding path program 173 times [2020-09-15 01:15:53,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:15:53,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52947802] [2020-09-15 01:15:53,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:15:53,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:15:54,309 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:54,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52947802] [2020-09-15 01:15:54,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538502822] [2020-09-15 01:15:54,310 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:54,382 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-15 01:15:54,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:15:54,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 01:15:54,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:15:54,418 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:54,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:15:54,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-15 01:15:54,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963493743] [2020-09-15 01:15:54,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-15 01:15:54,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:15:54,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-15 01:15:54,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:15:54,420 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 21 states. [2020-09-15 01:15:56,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:15:56,006 INFO L93 Difference]: Finished difference Result 119 states and 283 transitions. [2020-09-15 01:15:56,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-15 01:15:56,008 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-15 01:15:56,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:15:56,009 INFO L225 Difference]: With dead ends: 119 [2020-09-15 01:15:56,009 INFO L226 Difference]: Without dead ends: 113 [2020-09-15 01:15:56,009 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=868, Invalid=1994, Unknown=0, NotChecked=0, Total=2862 [2020-09-15 01:15:56,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-15 01:15:56,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 83. [2020-09-15 01:15:56,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-15 01:15:56,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 211 transitions. [2020-09-15 01:15:56,014 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 211 transitions. Word has length 25 [2020-09-15 01:15:56,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:15:56,015 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 211 transitions. [2020-09-15 01:15:56,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-15 01:15:56,015 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 211 transitions. [2020-09-15 01:15:56,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 01:15:56,015 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:15:56,015 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:15:56,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:56,226 INFO L427 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:15:56,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:15:56,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1481125022, now seen corresponding path program 174 times [2020-09-15 01:15:56,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:15:56,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815342663] [2020-09-15 01:15:56,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:15:56,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:15:56,635 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:56,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815342663] [2020-09-15 01:15:56,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130274292] [2020-09-15 01:15:56,636 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:56,711 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-15 01:15:56,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:15:56,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 01:15:56,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:15:56,774 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:15:56,817 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:56,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:15:56,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-15 01:15:56,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159215812] [2020-09-15 01:15:56,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 01:15:56,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:15:56,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 01:15:56,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:15:56,819 INFO L87 Difference]: Start difference. First operand 83 states and 211 transitions. Second operand 22 states. [2020-09-15 01:15:58,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:15:58,787 INFO L93 Difference]: Finished difference Result 116 states and 277 transitions. [2020-09-15 01:15:58,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-15 01:15:58,788 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-15 01:15:58,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:15:58,789 INFO L225 Difference]: With dead ends: 116 [2020-09-15 01:15:58,789 INFO L226 Difference]: Without dead ends: 110 [2020-09-15 01:15:58,789 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=878, Invalid=2092, Unknown=0, NotChecked=0, Total=2970 [2020-09-15 01:15:58,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-15 01:15:58,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 82. [2020-09-15 01:15:58,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-15 01:15:58,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-09-15 01:15:58,792 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 25 [2020-09-15 01:15:58,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:15:58,792 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-09-15 01:15:58,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 01:15:58,792 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-09-15 01:15:58,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 01:15:58,793 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:15:58,793 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:15:58,993 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:58,994 INFO L427 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:15:58,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:15:58,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1480634912, now seen corresponding path program 175 times [2020-09-15 01:15:58,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:15:58,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549252330] [2020-09-15 01:15:58,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:15:59,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:15:59,380 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:59,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549252330] [2020-09-15 01:15:59,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908207556] [2020-09-15 01:15:59,381 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:59,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:15:59,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 01:15:59,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:15:59,484 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:59,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:15:59,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-15 01:15:59,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683279530] [2020-09-15 01:15:59,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-15 01:15:59,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:15:59,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-15 01:15:59,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:15:59,486 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 21 states. [2020-09-15 01:16:00,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:16:00,926 INFO L93 Difference]: Finished difference Result 136 states and 327 transitions. [2020-09-15 01:16:00,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-15 01:16:00,927 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-15 01:16:00,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:16:00,928 INFO L225 Difference]: With dead ends: 136 [2020-09-15 01:16:00,928 INFO L226 Difference]: Without dead ends: 130 [2020-09-15 01:16:00,929 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=986, Invalid=2094, Unknown=0, NotChecked=0, Total=3080 [2020-09-15 01:16:00,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-09-15 01:16:00,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 88. [2020-09-15 01:16:00,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-15 01:16:00,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 229 transitions. [2020-09-15 01:16:00,932 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 229 transitions. Word has length 25 [2020-09-15 01:16:00,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:16:00,932 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 229 transitions. [2020-09-15 01:16:00,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-15 01:16:00,932 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 229 transitions. [2020-09-15 01:16:00,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 01:16:00,933 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:16:00,933 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:16:01,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:01,141 INFO L427 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:16:01,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:16:01,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1480618172, now seen corresponding path program 176 times [2020-09-15 01:16:01,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:16:01,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678075230] [2020-09-15 01:16:01,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:16:01,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:16:01,516 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:01,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678075230] [2020-09-15 01:16:01,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526515599] [2020-09-15 01:16:01,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:01,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:16:01,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:16:01,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 01:16:01,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:16:01,621 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:16:01,647 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:01,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:16:01,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-15 01:16:01,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503336692] [2020-09-15 01:16:01,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 01:16:01,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:16:01,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 01:16:01,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:16:01,649 INFO L87 Difference]: Start difference. First operand 88 states and 229 transitions. Second operand 22 states. [2020-09-15 01:16:03,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:16:03,376 INFO L93 Difference]: Finished difference Result 117 states and 283 transitions. [2020-09-15 01:16:03,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-15 01:16:03,377 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-15 01:16:03,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:16:03,378 INFO L225 Difference]: With dead ends: 117 [2020-09-15 01:16:03,378 INFO L226 Difference]: Without dead ends: 109 [2020-09-15 01:16:03,378 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=997, Invalid=2195, Unknown=0, NotChecked=0, Total=3192 [2020-09-15 01:16:03,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-15 01:16:03,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2020-09-15 01:16:03,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-15 01:16:03,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 217 transitions. [2020-09-15 01:16:03,380 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 217 transitions. Word has length 25 [2020-09-15 01:16:03,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:16:03,381 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 217 transitions. [2020-09-15 01:16:03,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 01:16:03,381 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 217 transitions. [2020-09-15 01:16:03,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-15 01:16:03,381 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:16:03,381 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:16:03,582 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:03,582 INFO L427 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:16:03,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:16:03,583 INFO L82 PathProgramCache]: Analyzing trace with hash 601326971, now seen corresponding path program 177 times [2020-09-15 01:16:03,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:16:03,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234228937] [2020-09-15 01:16:03,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:16:03,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:16:04,117 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:04,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234228937] [2020-09-15 01:16:04,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351640271] [2020-09-15 01:16:04,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:04,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-15 01:16:04,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:16:04,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-15 01:16:04,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:16:04,207 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:04,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:16:04,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-15 01:16:04,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611376434] [2020-09-15 01:16:04,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 01:16:04,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:16:04,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 01:16:04,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:16:04,209 INFO L87 Difference]: Start difference. First operand 85 states and 217 transitions. Second operand 22 states. [2020-09-15 01:16:05,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:16:05,150 INFO L93 Difference]: Finished difference Result 134 states and 315 transitions. [2020-09-15 01:16:05,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-15 01:16:05,151 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-15 01:16:05,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:16:05,152 INFO L225 Difference]: With dead ends: 134 [2020-09-15 01:16:05,152 INFO L226 Difference]: Without dead ends: 128 [2020-09-15 01:16:05,153 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=499, Invalid=1141, Unknown=0, NotChecked=0, Total=1640 [2020-09-15 01:16:05,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-15 01:16:05,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 87. [2020-09-15 01:16:05,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-15 01:16:05,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-15 01:16:05,155 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-15 01:16:05,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:16:05,156 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-15 01:16:05,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 01:16:05,156 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-15 01:16:05,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-15 01:16:05,156 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:16:05,156 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:16:05,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2020-09-15 01:16:05,357 INFO L427 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:16:05,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:16:05,358 INFO L82 PathProgramCache]: Analyzing trace with hash -946831649, now seen corresponding path program 178 times [2020-09-15 01:16:05,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:16:05,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517906396] [2020-09-15 01:16:05,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:16:05,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:16:05,942 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:05,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517906396] [2020-09-15 01:16:05,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570087576] [2020-09-15 01:16:05,943 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:06,022 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:16:06,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:16:06,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-15 01:16:06,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:16:06,073 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:16:06,091 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:06,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:16:06,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-15 01:16:06,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187465071] [2020-09-15 01:16:06,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 01:16:06,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:16:06,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 01:16:06,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:16:06,092 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-15 01:16:07,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:16:07,196 INFO L93 Difference]: Finished difference Result 131 states and 309 transitions. [2020-09-15 01:16:07,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-15 01:16:07,198 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-15 01:16:07,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:16:07,199 INFO L225 Difference]: With dead ends: 131 [2020-09-15 01:16:07,199 INFO L226 Difference]: Without dead ends: 125 [2020-09-15 01:16:07,199 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=546, Invalid=1346, Unknown=0, NotChecked=0, Total=1892 [2020-09-15 01:16:07,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-15 01:16:07,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 86. [2020-09-15 01:16:07,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-15 01:16:07,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-15 01:16:07,202 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-15 01:16:07,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:16:07,202 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-15 01:16:07,202 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 01:16:07,202 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-15 01:16:07,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-15 01:16:07,203 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:16:07,203 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:16:07,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-09-15 01:16:07,413 INFO L427 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:16:07,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:16:07,413 INFO L82 PathProgramCache]: Analyzing trace with hash 2046346461, now seen corresponding path program 179 times [2020-09-15 01:16:07,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:16:07,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894596895] [2020-09-15 01:16:07,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:16:07,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:16:07,953 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:07,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894596895] [2020-09-15 01:16:07,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584114204] [2020-09-15 01:16:07,954 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:08,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-15 01:16:08,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:16:08,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-15 01:16:08,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:16:08,055 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:08,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:16:08,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-15 01:16:08,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363930030] [2020-09-15 01:16:08,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 01:16:08,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:16:08,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 01:16:08,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:16:08,057 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-15 01:16:09,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:16:09,114 INFO L93 Difference]: Finished difference Result 128 states and 303 transitions. [2020-09-15 01:16:09,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-15 01:16:09,116 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-15 01:16:09,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:16:09,117 INFO L225 Difference]: With dead ends: 128 [2020-09-15 01:16:09,117 INFO L226 Difference]: Without dead ends: 122 [2020-09-15 01:16:09,117 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=506, Invalid=1300, Unknown=0, NotChecked=0, Total=1806 [2020-09-15 01:16:09,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-15 01:16:09,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 87. [2020-09-15 01:16:09,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-15 01:16:09,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-15 01:16:09,120 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-15 01:16:09,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:16:09,120 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-15 01:16:09,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 01:16:09,120 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-15 01:16:09,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-15 01:16:09,121 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:16:09,121 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:16:09,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:09,322 INFO L427 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:16:09,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:16:09,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1235797825, now seen corresponding path program 180 times [2020-09-15 01:16:09,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:16:09,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625186592] [2020-09-15 01:16:09,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:16:09,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:16:09,856 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:09,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625186592] [2020-09-15 01:16:09,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869317039] [2020-09-15 01:16:09,857 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:09,931 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-15 01:16:09,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:16:09,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-15 01:16:09,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:16:09,973 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:16:09,993 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:09,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:16:09,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-15 01:16:09,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797382767] [2020-09-15 01:16:09,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 01:16:09,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:16:09,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 01:16:09,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:16:09,995 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-15 01:16:11,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:16:11,074 INFO L93 Difference]: Finished difference Result 127 states and 301 transitions. [2020-09-15 01:16:11,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-15 01:16:11,075 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-15 01:16:11,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:16:11,076 INFO L225 Difference]: With dead ends: 127 [2020-09-15 01:16:11,076 INFO L226 Difference]: Without dead ends: 121 [2020-09-15 01:16:11,077 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=560, Invalid=1510, Unknown=0, NotChecked=0, Total=2070 [2020-09-15 01:16:11,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-15 01:16:11,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 86. [2020-09-15 01:16:11,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-15 01:16:11,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-15 01:16:11,079 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-15 01:16:11,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:16:11,079 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-15 01:16:11,080 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 01:16:11,080 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-15 01:16:11,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-15 01:16:11,080 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:16:11,080 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:16:11,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2020-09-15 01:16:11,281 INFO L427 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:16:11,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:16:11,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1288074431, now seen corresponding path program 181 times [2020-09-15 01:16:11,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:16:11,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081335123] [2020-09-15 01:16:11,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:16:11,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:16:11,767 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:11,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081335123] [2020-09-15 01:16:11,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548500268] [2020-09-15 01:16:11,768 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:11,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:16:11,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-15 01:16:11,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:16:11,854 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:11,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:16:11,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-15 01:16:11,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511652576] [2020-09-15 01:16:11,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 01:16:11,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:16:11,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 01:16:11,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:16:11,856 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-15 01:16:12,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:16:12,952 INFO L93 Difference]: Finished difference Result 124 states and 295 transitions. [2020-09-15 01:16:12,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-15 01:16:12,954 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-15 01:16:12,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:16:12,954 INFO L225 Difference]: With dead ends: 124 [2020-09-15 01:16:12,955 INFO L226 Difference]: Without dead ends: 118 [2020-09-15 01:16:12,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=529, Invalid=1451, Unknown=0, NotChecked=0, Total=1980 [2020-09-15 01:16:12,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-15 01:16:12,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 87. [2020-09-15 01:16:12,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-15 01:16:12,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-15 01:16:12,958 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-15 01:16:12,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:16:12,958 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-15 01:16:12,958 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 01:16:12,958 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-15 01:16:12,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-15 01:16:12,958 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:16:12,958 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:16:13,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:13,164 INFO L427 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:16:13,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:16:13,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1130643421, now seen corresponding path program 182 times [2020-09-15 01:16:13,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:16:13,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655636543] [2020-09-15 01:16:13,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:16:13,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:16:13,745 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:13,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655636543] [2020-09-15 01:16:13,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675670918] [2020-09-15 01:16:13,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:13,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:16:13,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:16:13,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-15 01:16:13,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:16:13,854 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:16:13,873 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:13,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:16:13,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-15 01:16:13,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928517858] [2020-09-15 01:16:13,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 01:16:13,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:16:13,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 01:16:13,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:16:13,875 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-15 01:16:15,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:16:15,182 INFO L93 Difference]: Finished difference Result 123 states and 293 transitions. [2020-09-15 01:16:15,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 01:16:15,184 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-15 01:16:15,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:16:15,185 INFO L225 Difference]: With dead ends: 123 [2020-09-15 01:16:15,185 INFO L226 Difference]: Without dead ends: 117 [2020-09-15 01:16:15,186 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=590, Invalid=1666, Unknown=0, NotChecked=0, Total=2256 [2020-09-15 01:16:15,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-15 01:16:15,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 86. [2020-09-15 01:16:15,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-15 01:16:15,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-15 01:16:15,188 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-15 01:16:15,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:16:15,188 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-15 01:16:15,188 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 01:16:15,188 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-15 01:16:15,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-15 01:16:15,189 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:16:15,189 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:16:15,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:15,390 INFO L427 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:16:15,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:16:15,390 INFO L82 PathProgramCache]: Analyzing trace with hash -442321631, now seen corresponding path program 183 times [2020-09-15 01:16:15,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:16:15,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046873788] [2020-09-15 01:16:15,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:16:15,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:16:15,869 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:15,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046873788] [2020-09-15 01:16:15,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084521066] [2020-09-15 01:16:15,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:15,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-15 01:16:15,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:16:15,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-15 01:16:15,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:16:15,963 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:15,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:16:15,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-15 01:16:15,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783999609] [2020-09-15 01:16:15,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 01:16:15,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:16:15,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 01:16:15,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:16:15,965 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-15 01:16:17,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:16:17,112 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-09-15 01:16:17,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-15 01:16:17,114 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-15 01:16:17,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:16:17,115 INFO L225 Difference]: With dead ends: 120 [2020-09-15 01:16:17,115 INFO L226 Difference]: Without dead ends: 114 [2020-09-15 01:16:17,116 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=568, Invalid=1594, Unknown=0, NotChecked=0, Total=2162 [2020-09-15 01:16:17,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-15 01:16:17,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 87. [2020-09-15 01:16:17,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-15 01:16:17,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-15 01:16:17,118 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-15 01:16:17,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:16:17,118 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-15 01:16:17,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 01:16:17,118 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-15 01:16:17,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-15 01:16:17,118 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:16:17,119 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:16:17,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:17,319 INFO L427 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:16:17,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:16:17,320 INFO L82 PathProgramCache]: Analyzing trace with hash 542869893, now seen corresponding path program 184 times [2020-09-15 01:16:17,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:16:17,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387895958] [2020-09-15 01:16:17,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:16:17,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:16:17,798 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:17,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387895958] [2020-09-15 01:16:17,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736818081] [2020-09-15 01:16:17,799 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:17,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:16:17,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:16:17,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-15 01:16:17,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:16:17,902 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:16:17,922 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:17,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:16:17,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-15 01:16:17,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296540339] [2020-09-15 01:16:17,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 01:16:17,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:16:17,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 01:16:17,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:16:17,924 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-15 01:16:19,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:16:19,379 INFO L93 Difference]: Finished difference Result 119 states and 285 transitions. [2020-09-15 01:16:19,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 01:16:19,380 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-15 01:16:19,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:16:19,381 INFO L225 Difference]: With dead ends: 119 [2020-09-15 01:16:19,381 INFO L226 Difference]: Without dead ends: 113 [2020-09-15 01:16:19,382 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=636, Invalid=1814, Unknown=0, NotChecked=0, Total=2450 [2020-09-15 01:16:19,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-15 01:16:19,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 86. [2020-09-15 01:16:19,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-15 01:16:19,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-15 01:16:19,385 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-15 01:16:19,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:16:19,386 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-15 01:16:19,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 01:16:19,386 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-15 01:16:19,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-15 01:16:19,386 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:16:19,386 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:16:19,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:19,588 INFO L427 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:16:19,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:16:19,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1074289149, now seen corresponding path program 185 times [2020-09-15 01:16:19,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:16:19,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940521730] [2020-09-15 01:16:19,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:16:19,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:16:20,062 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:20,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940521730] [2020-09-15 01:16:20,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859531813] [2020-09-15 01:16:20,063 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:20,133 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-15 01:16:20,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:16:20,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-15 01:16:20,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:16:20,161 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:20,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:16:20,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-15 01:16:20,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477697479] [2020-09-15 01:16:20,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 01:16:20,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:16:20,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 01:16:20,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:16:20,162 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-15 01:16:21,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:16:21,451 INFO L93 Difference]: Finished difference Result 116 states and 279 transitions. [2020-09-15 01:16:21,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-15 01:16:21,453 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-15 01:16:21,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:16:21,454 INFO L225 Difference]: With dead ends: 116 [2020-09-15 01:16:21,454 INFO L226 Difference]: Without dead ends: 110 [2020-09-15 01:16:21,455 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=623, Invalid=1729, Unknown=0, NotChecked=0, Total=2352 [2020-09-15 01:16:21,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-15 01:16:21,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 87. [2020-09-15 01:16:21,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-15 01:16:21,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-15 01:16:21,457 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-15 01:16:21,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:16:21,458 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-15 01:16:21,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 01:16:21,458 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-15 01:16:21,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-15 01:16:21,458 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:16:21,458 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:16:21,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable186 [2020-09-15 01:16:21,659 INFO L427 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:16:21,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:16:21,660 INFO L82 PathProgramCache]: Analyzing trace with hash 182600551, now seen corresponding path program 186 times [2020-09-15 01:16:21,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:16:21,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370552283] [2020-09-15 01:16:21,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:16:21,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:16:22,130 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:22,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370552283] [2020-09-15 01:16:22,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43287402] [2020-09-15 01:16:22,131 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:22,211 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-15 01:16:22,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:16:22,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-15 01:16:22,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:16:22,253 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:16:22,276 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:22,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:16:22,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-15 01:16:22,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106291912] [2020-09-15 01:16:22,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 01:16:22,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:16:22,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 01:16:22,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:16:22,278 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-15 01:16:23,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:16:23,891 INFO L93 Difference]: Finished difference Result 115 states and 277 transitions. [2020-09-15 01:16:23,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-15 01:16:23,892 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-15 01:16:23,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:16:23,893 INFO L225 Difference]: With dead ends: 115 [2020-09-15 01:16:23,893 INFO L226 Difference]: Without dead ends: 109 [2020-09-15 01:16:23,894 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=698, Invalid=1954, Unknown=0, NotChecked=0, Total=2652 [2020-09-15 01:16:23,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-15 01:16:23,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 86. [2020-09-15 01:16:23,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-15 01:16:23,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-15 01:16:23,896 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-15 01:16:23,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:16:23,897 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-15 01:16:23,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 01:16:23,897 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-15 01:16:23,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-15 01:16:23,897 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:16:23,897 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:16:24,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:24,107 INFO L427 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:16:24,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:16:24,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1798793061, now seen corresponding path program 187 times [2020-09-15 01:16:24,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:16:24,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828732712] [2020-09-15 01:16:24,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:16:24,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:16:24,562 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:24,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828732712] [2020-09-15 01:16:24,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413136776] [2020-09-15 01:16:24,563 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:24,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:16:24,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-15 01:16:24,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:16:24,667 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:24,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:16:24,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-15 01:16:24,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353203919] [2020-09-15 01:16:24,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 01:16:24,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:16:24,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 01:16:24,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:16:24,669 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-15 01:16:26,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:16:26,041 INFO L93 Difference]: Finished difference Result 112 states and 271 transitions. [2020-09-15 01:16:26,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-15 01:16:26,042 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-15 01:16:26,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:16:26,043 INFO L225 Difference]: With dead ends: 112 [2020-09-15 01:16:26,043 INFO L226 Difference]: Without dead ends: 106 [2020-09-15 01:16:26,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=694, Invalid=1856, Unknown=0, NotChecked=0, Total=2550 [2020-09-15 01:16:26,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-15 01:16:26,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 87. [2020-09-15 01:16:26,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-15 01:16:26,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-15 01:16:26,046 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-15 01:16:26,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:16:26,046 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-15 01:16:26,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 01:16:26,046 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-15 01:16:26,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-15 01:16:26,047 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:16:26,047 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:16:26,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2020-09-15 01:16:26,248 INFO L427 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:16:26,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:16:26,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1976431159, now seen corresponding path program 188 times [2020-09-15 01:16:26,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:16:26,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177000224] [2020-09-15 01:16:26,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:16:26,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:16:26,716 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:26,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177000224] [2020-09-15 01:16:26,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328634541] [2020-09-15 01:16:26,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:26,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:16:26,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:16:26,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-15 01:16:26,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:16:26,826 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:16:26,850 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:26,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:16:26,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-15 01:16:26,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54221535] [2020-09-15 01:16:26,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 01:16:26,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:16:26,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 01:16:26,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:16:26,852 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-15 01:16:28,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:16:28,641 INFO L93 Difference]: Finished difference Result 111 states and 269 transitions. [2020-09-15 01:16:28,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-15 01:16:28,642 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-15 01:16:28,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:16:28,643 INFO L225 Difference]: With dead ends: 111 [2020-09-15 01:16:28,643 INFO L226 Difference]: Without dead ends: 105 [2020-09-15 01:16:28,644 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=776, Invalid=2086, Unknown=0, NotChecked=0, Total=2862 [2020-09-15 01:16:28,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-15 01:16:28,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 86. [2020-09-15 01:16:28,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-15 01:16:28,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-15 01:16:28,646 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-15 01:16:28,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:16:28,647 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-15 01:16:28,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 01:16:28,647 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-15 01:16:28,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-15 01:16:28,647 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:16:28,647 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:16:28,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-09-15 01:16:28,852 INFO L427 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:16:28,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:16:28,852 INFO L82 PathProgramCache]: Analyzing trace with hash -321119929, now seen corresponding path program 189 times [2020-09-15 01:16:28,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:16:28,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721284467] [2020-09-15 01:16:28,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:16:28,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:16:29,319 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:29,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721284467] [2020-09-15 01:16:29,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541583610] [2020-09-15 01:16:29,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:29,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-15 01:16:29,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:16:29,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-15 01:16:29,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:16:29,434 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:29,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:16:29,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-15 01:16:29,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369486242] [2020-09-15 01:16:29,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 01:16:29,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:16:29,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 01:16:29,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:16:29,436 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-15 01:16:31,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:16:31,072 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-09-15 01:16:31,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-15 01:16:31,073 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-15 01:16:31,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:16:31,074 INFO L225 Difference]: With dead ends: 108 [2020-09-15 01:16:31,074 INFO L226 Difference]: Without dead ends: 102 [2020-09-15 01:16:31,075 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=781, Invalid=1975, Unknown=0, NotChecked=0, Total=2756 [2020-09-15 01:16:31,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-15 01:16:31,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 87. [2020-09-15 01:16:31,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-15 01:16:31,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-15 01:16:31,077 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-15 01:16:31,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:16:31,077 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-15 01:16:31,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 01:16:31,077 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-15 01:16:31,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-15 01:16:31,077 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:16:31,077 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:16:31,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:31,285 INFO L427 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:16:31,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:16:31,285 INFO L82 PathProgramCache]: Analyzing trace with hash -2041247573, now seen corresponding path program 190 times [2020-09-15 01:16:31,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:16:31,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340448898] [2020-09-15 01:16:31,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:16:31,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:16:31,757 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:31,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340448898] [2020-09-15 01:16:31,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475469785] [2020-09-15 01:16:31,758 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:31,825 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:16:31,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:16:31,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-15 01:16:31,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:16:31,872 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:16:31,898 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:31,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:16:31,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-15 01:16:31,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700932906] [2020-09-15 01:16:31,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 01:16:31,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:16:31,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 01:16:31,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:16:31,901 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-15 01:16:33,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:16:33,935 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-09-15 01:16:33,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-15 01:16:33,937 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-15 01:16:33,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:16:33,938 INFO L225 Difference]: With dead ends: 107 [2020-09-15 01:16:33,938 INFO L226 Difference]: Without dead ends: 101 [2020-09-15 01:16:33,938 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=870, Invalid=2210, Unknown=0, NotChecked=0, Total=3080 [2020-09-15 01:16:33,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-15 01:16:33,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 86. [2020-09-15 01:16:33,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-15 01:16:33,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-15 01:16:33,941 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-15 01:16:33,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:16:33,941 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-15 01:16:33,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 01:16:33,941 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-15 01:16:33,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-15 01:16:33,941 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:16:33,941 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:16:34,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:34,142 INFO L427 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:16:34,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:16:34,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1570251863, now seen corresponding path program 191 times [2020-09-15 01:16:34,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:16:34,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798081272] [2020-09-15 01:16:34,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:16:34,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:16:34,575 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:34,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798081272] [2020-09-15 01:16:34,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300862739] [2020-09-15 01:16:34,576 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:34,648 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-15 01:16:34,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:16:34,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-15 01:16:34,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:16:34,682 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:34,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:16:34,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-15 01:16:34,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254113541] [2020-09-15 01:16:34,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 01:16:34,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:16:34,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 01:16:34,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:16:34,683 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-15 01:16:36,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:16:36,280 INFO L93 Difference]: Finished difference Result 104 states and 255 transitions. [2020-09-15 01:16:36,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-15 01:16:36,281 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-15 01:16:36,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:16:36,281 INFO L225 Difference]: With dead ends: 104 [2020-09-15 01:16:36,282 INFO L226 Difference]: Without dead ends: 98 [2020-09-15 01:16:36,282 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=884, Invalid=2086, Unknown=0, NotChecked=0, Total=2970 [2020-09-15 01:16:36,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-15 01:16:36,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 87. [2020-09-15 01:16:36,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-15 01:16:36,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-15 01:16:36,285 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-15 01:16:36,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:16:36,285 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-15 01:16:36,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 01:16:36,285 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-15 01:16:36,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-15 01:16:36,286 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:16:36,286 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:16:36,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:36,487 INFO L427 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:16:36,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:16:36,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1554164723, now seen corresponding path program 192 times [2020-09-15 01:16:36,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:16:36,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119641107] [2020-09-15 01:16:36,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:16:36,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:16:36,980 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:36,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119641107] [2020-09-15 01:16:36,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424740678] [2020-09-15 01:16:36,981 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:37,065 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-15 01:16:37,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:16:37,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-15 01:16:37,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:16:37,114 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:16:37,145 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:37,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:16:37,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-15 01:16:37,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127041873] [2020-09-15 01:16:37,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 01:16:37,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:16:37,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 01:16:37,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:16:37,147 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-15 01:16:39,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:16:39,280 INFO L93 Difference]: Finished difference Result 103 states and 253 transitions. [2020-09-15 01:16:39,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-15 01:16:39,282 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-15 01:16:39,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:16:39,283 INFO L225 Difference]: With dead ends: 103 [2020-09-15 01:16:39,283 INFO L226 Difference]: Without dead ends: 97 [2020-09-15 01:16:39,283 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=980, Invalid=2326, Unknown=0, NotChecked=0, Total=3306 [2020-09-15 01:16:39,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-15 01:16:39,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2020-09-15 01:16:39,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-15 01:16:39,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-15 01:16:39,286 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-15 01:16:39,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:16:39,286 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-15 01:16:39,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 01:16:39,286 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-15 01:16:39,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-15 01:16:39,287 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:16:39,287 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:16:39,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2020-09-15 01:16:39,488 INFO L427 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:16:39,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:16:39,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1553674613, now seen corresponding path program 193 times [2020-09-15 01:16:39,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:16:39,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883249584] [2020-09-15 01:16:39,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:16:39,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:16:39,947 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:39,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883249584] [2020-09-15 01:16:39,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503420911] [2020-09-15 01:16:39,948 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:40,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:16:40,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-15 01:16:40,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:16:40,064 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:40,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:16:40,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-15 01:16:40,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106661386] [2020-09-15 01:16:40,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 01:16:40,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:16:40,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 01:16:40,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:16:40,067 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-15 01:16:41,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:16:41,722 INFO L93 Difference]: Finished difference Result 119 states and 293 transitions. [2020-09-15 01:16:41,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-15 01:16:41,724 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-15 01:16:41,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:16:41,725 INFO L225 Difference]: With dead ends: 119 [2020-09-15 01:16:41,725 INFO L226 Difference]: Without dead ends: 113 [2020-09-15 01:16:41,726 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1003, Invalid=2189, Unknown=0, NotChecked=0, Total=3192 [2020-09-15 01:16:41,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-15 01:16:41,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 90. [2020-09-15 01:16:41,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-15 01:16:41,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 233 transitions. [2020-09-15 01:16:41,728 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 233 transitions. Word has length 26 [2020-09-15 01:16:41,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:16:41,728 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 233 transitions. [2020-09-15 01:16:41,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 01:16:41,728 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 233 transitions. [2020-09-15 01:16:41,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-15 01:16:41,728 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:16:41,728 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:16:41,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:41,929 INFO L427 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:16:41,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:16:41,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1553657873, now seen corresponding path program 194 times [2020-09-15 01:16:41,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:16:41,931 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101224214] [2020-09-15 01:16:41,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:16:41,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:16:42,354 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:42,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101224214] [2020-09-15 01:16:42,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399226990] [2020-09-15 01:16:42,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:42,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:16:42,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:16:42,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-15 01:16:42,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:16:42,467 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:16:42,494 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:42,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:16:42,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-15 01:16:42,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646380494] [2020-09-15 01:16:42,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 01:16:42,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:16:42,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 01:16:42,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:16:42,497 INFO L87 Difference]: Start difference. First operand 90 states and 233 transitions. Second operand 23 states. [2020-09-15 01:16:44,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:16:44,577 INFO L93 Difference]: Finished difference Result 100 states and 249 transitions. [2020-09-15 01:16:44,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-15 01:16:44,578 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-15 01:16:44,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:16:44,579 INFO L225 Difference]: With dead ends: 100 [2020-09-15 01:16:44,579 INFO L226 Difference]: Without dead ends: 92 [2020-09-15 01:16:44,579 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1106, Invalid=2434, Unknown=0, NotChecked=0, Total=3540 [2020-09-15 01:16:44,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-15 01:16:44,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2020-09-15 01:16:44,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-15 01:16:44,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 158 transitions. [2020-09-15 01:16:44,581 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 158 transitions. Word has length 26 [2020-09-15 01:16:44,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:16:44,581 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 158 transitions. [2020-09-15 01:16:44,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 01:16:44,582 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 158 transitions. [2020-09-15 01:16:44,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-15 01:16:44,582 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:16:44,582 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:16:44,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:44,783 INFO L427 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:16:44,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:16:44,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1345493231, now seen corresponding path program 195 times [2020-09-15 01:16:44,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:16:44,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187245569] [2020-09-15 01:16:44,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:16:44,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:16:45,173 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:45,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187245569] [2020-09-15 01:16:45,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782711528] [2020-09-15 01:16:45,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:45,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-15 01:16:45,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:16:45,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-15 01:16:45,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:16:45,288 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:16:45,320 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:45,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:16:45,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-15 01:16:45,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278517476] [2020-09-15 01:16:45,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 01:16:45,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:16:45,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 01:16:45,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:16:45,322 INFO L87 Difference]: Start difference. First operand 65 states and 158 transitions. Second operand 23 states. [2020-09-15 01:16:47,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:16:47,300 INFO L93 Difference]: Finished difference Result 116 states and 283 transitions. [2020-09-15 01:16:47,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-15 01:16:47,301 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-15 01:16:47,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:16:47,301 INFO L225 Difference]: With dead ends: 116 [2020-09-15 01:16:47,301 INFO L226 Difference]: Without dead ends: 111 [2020-09-15 01:16:47,302 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1153, Invalid=2387, Unknown=0, NotChecked=0, Total=3540 [2020-09-15 01:16:47,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-15 01:16:47,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 88. [2020-09-15 01:16:47,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-15 01:16:47,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-09-15 01:16:47,303 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 26 [2020-09-15 01:16:47,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:16:47,304 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-09-15 01:16:47,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 01:16:47,304 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-09-15 01:16:47,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 01:16:47,304 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:16:47,304 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:16:47,505 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:47,505 INFO L427 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:16:47,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:16:47,506 INFO L82 PathProgramCache]: Analyzing trace with hash -918737500, now seen corresponding path program 196 times [2020-09-15 01:16:47,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:16:47,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423434888] [2020-09-15 01:16:47,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:16:47,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:16:47,951 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:47,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423434888] [2020-09-15 01:16:47,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689736321] [2020-09-15 01:16:47,952 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:48,019 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:16:48,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:16:48,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 01:16:48,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:16:48,073 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:16:48,113 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:48,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:16:48,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-15 01:16:48,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474082096] [2020-09-15 01:16:48,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 01:16:48,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:16:48,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 01:16:48,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:16:48,116 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 24 states. [2020-09-15 01:16:50,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:16:50,275 INFO L93 Difference]: Finished difference Result 96 states and 245 transitions. [2020-09-15 01:16:50,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-15 01:16:50,277 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-15 01:16:50,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:16:50,278 INFO L225 Difference]: With dead ends: 96 [2020-09-15 01:16:50,278 INFO L226 Difference]: Without dead ends: 91 [2020-09-15 01:16:50,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1171, Invalid=2489, Unknown=0, NotChecked=0, Total=3660 [2020-09-15 01:16:50,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-15 01:16:50,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2020-09-15 01:16:50,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-15 01:16:50,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 162 transitions. [2020-09-15 01:16:50,281 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 162 transitions. Word has length 27 [2020-09-15 01:16:50,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:16:50,282 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 162 transitions. [2020-09-15 01:16:50,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 01:16:50,282 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 162 transitions. [2020-09-15 01:16:50,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 01:16:50,282 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:16:50,282 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:16:50,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:50,491 INFO L427 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:16:50,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:16:50,492 INFO L82 PathProgramCache]: Analyzing trace with hash -473673969, now seen corresponding path program 197 times [2020-09-15 01:16:50,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:16:50,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867424511] [2020-09-15 01:16:50,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:16:50,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:16:51,102 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:51,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867424511] [2020-09-15 01:16:51,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418814472] [2020-09-15 01:16:51,102 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:51,169 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-15 01:16:51,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:16:51,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 01:16:51,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:16:51,182 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:51,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:16:51,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-15 01:16:51,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034408569] [2020-09-15 01:16:51,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 01:16:51,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:16:51,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 01:16:51,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:16:51,183 INFO L87 Difference]: Start difference. First operand 66 states and 162 transitions. Second operand 23 states. [2020-09-15 01:16:52,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:16:52,137 INFO L93 Difference]: Finished difference Result 102 states and 237 transitions. [2020-09-15 01:16:52,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-15 01:16:52,139 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-15 01:16:52,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:16:52,140 INFO L225 Difference]: With dead ends: 102 [2020-09-15 01:16:52,140 INFO L226 Difference]: Without dead ends: 96 [2020-09-15 01:16:52,141 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=553, Invalid=1169, Unknown=0, NotChecked=0, Total=1722 [2020-09-15 01:16:52,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-15 01:16:52,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2020-09-15 01:16:52,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-15 01:16:52,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 181 transitions. [2020-09-15 01:16:52,143 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 181 transitions. Word has length 27 [2020-09-15 01:16:52,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:16:52,143 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 181 transitions. [2020-09-15 01:16:52,143 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 01:16:52,143 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 181 transitions. [2020-09-15 01:16:52,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 01:16:52,144 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:16:52,144 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:16:52,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2020-09-15 01:16:52,345 INFO L427 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:16:52,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:16:52,345 INFO L82 PathProgramCache]: Analyzing trace with hash 2099543923, now seen corresponding path program 198 times [2020-09-15 01:16:52,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:16:52,346 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929716238] [2020-09-15 01:16:52,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:16:52,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:16:52,989 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:52,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929716238] [2020-09-15 01:16:52,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123457307] [2020-09-15 01:16:52,990 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:53,059 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-15 01:16:53,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:16:53,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 01:16:53,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:16:53,093 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:16:53,104 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:53,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:16:53,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-15 01:16:53,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445892566] [2020-09-15 01:16:53,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 01:16:53,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:16:53,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 01:16:53,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:16:53,105 INFO L87 Difference]: Start difference. First operand 74 states and 181 transitions. Second operand 24 states. [2020-09-15 01:16:54,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:16:54,035 INFO L93 Difference]: Finished difference Result 122 states and 277 transitions. [2020-09-15 01:16:54,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-15 01:16:54,037 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-15 01:16:54,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:16:54,037 INFO L225 Difference]: With dead ends: 122 [2020-09-15 01:16:54,037 INFO L226 Difference]: Without dead ends: 116 [2020-09-15 01:16:54,038 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=562, Invalid=1330, Unknown=0, NotChecked=0, Total=1892 [2020-09-15 01:16:54,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-09-15 01:16:54,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 72. [2020-09-15 01:16:54,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-15 01:16:54,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 177 transitions. [2020-09-15 01:16:54,039 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 177 transitions. Word has length 27 [2020-09-15 01:16:54,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:16:54,039 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 177 transitions. [2020-09-15 01:16:54,039 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 01:16:54,040 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 177 transitions. [2020-09-15 01:16:54,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 01:16:54,040 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:16:54,040 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:16:54,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2020-09-15 01:16:54,241 INFO L427 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:16:54,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:16:54,242 INFO L82 PathProgramCache]: Analyzing trace with hash 915619313, now seen corresponding path program 199 times [2020-09-15 01:16:54,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:16:54,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290411483] [2020-09-15 01:16:54,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:16:54,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:16:54,873 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:54,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290411483] [2020-09-15 01:16:54,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87368939] [2020-09-15 01:16:54,873 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:54,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:16:54,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 01:16:54,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:16:54,962 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:54,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:16:54,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-15 01:16:54,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251312743] [2020-09-15 01:16:54,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 01:16:54,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:16:54,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 01:16:54,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:16:54,964 INFO L87 Difference]: Start difference. First operand 72 states and 177 transitions. Second operand 23 states. [2020-09-15 01:16:56,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:16:56,077 INFO L93 Difference]: Finished difference Result 123 states and 281 transitions. [2020-09-15 01:16:56,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-15 01:16:56,078 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-15 01:16:56,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:16:56,079 INFO L225 Difference]: With dead ends: 123 [2020-09-15 01:16:56,079 INFO L226 Difference]: Without dead ends: 117 [2020-09-15 01:16:56,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=565, Invalid=1415, Unknown=0, NotChecked=0, Total=1980 [2020-09-15 01:16:56,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-15 01:16:56,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 75. [2020-09-15 01:16:56,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-15 01:16:56,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 185 transitions. [2020-09-15 01:16:56,082 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 185 transitions. Word has length 27 [2020-09-15 01:16:56,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:16:56,082 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 185 transitions. [2020-09-15 01:16:56,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 01:16:56,083 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 185 transitions. [2020-09-15 01:16:56,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 01:16:56,083 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:16:56,083 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:16:56,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2020-09-15 01:16:56,284 INFO L427 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:16:56,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:16:56,284 INFO L82 PathProgramCache]: Analyzing trace with hash -632539307, now seen corresponding path program 200 times [2020-09-15 01:16:56,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:16:56,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613676320] [2020-09-15 01:16:56,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:16:56,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:16:56,942 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:56,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613676320] [2020-09-15 01:16:56,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595616772] [2020-09-15 01:16:56,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:57,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:16:57,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:16:57,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 01:16:57,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:16:57,060 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:16:57,078 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:57,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:16:57,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-15 01:16:57,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993916117] [2020-09-15 01:16:57,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 01:16:57,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:16:57,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 01:16:57,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:16:57,080 INFO L87 Difference]: Start difference. First operand 75 states and 185 transitions. Second operand 24 states. [2020-09-15 01:16:58,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:16:58,423 INFO L93 Difference]: Finished difference Result 139 states and 313 transitions. [2020-09-15 01:16:58,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-15 01:16:58,425 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-15 01:16:58,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:16:58,426 INFO L225 Difference]: With dead ends: 139 [2020-09-15 01:16:58,426 INFO L226 Difference]: Without dead ends: 133 [2020-09-15 01:16:58,427 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=601, Invalid=1561, Unknown=0, NotChecked=0, Total=2162 [2020-09-15 01:16:58,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-15 01:16:58,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 74. [2020-09-15 01:16:58,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-15 01:16:58,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 183 transitions. [2020-09-15 01:16:58,430 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 183 transitions. Word has length 27 [2020-09-15 01:16:58,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:16:58,430 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 183 transitions. [2020-09-15 01:16:58,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 01:16:58,430 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 183 transitions. [2020-09-15 01:16:58,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 01:16:58,431 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:16:58,431 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:16:58,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2020-09-15 01:16:58,642 INFO L427 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:16:58,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:16:58,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1934328493, now seen corresponding path program 201 times [2020-09-15 01:16:58,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:16:58,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735530798] [2020-09-15 01:16:58,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:16:58,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:16:59,295 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:59,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735530798] [2020-09-15 01:16:59,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199725603] [2020-09-15 01:16:59,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:59,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-15 01:16:59,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:16:59,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 01:16:59,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:16:59,398 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:59,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:16:59,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-15 01:16:59,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689723405] [2020-09-15 01:16:59,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 01:16:59,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:16:59,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 01:16:59,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:16:59,400 INFO L87 Difference]: Start difference. First operand 74 states and 183 transitions. Second operand 23 states. [2020-09-15 01:17:00,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:17:00,825 INFO L93 Difference]: Finished difference Result 139 states and 315 transitions. [2020-09-15 01:17:00,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-15 01:17:00,827 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-15 01:17:00,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:17:00,828 INFO L225 Difference]: With dead ends: 139 [2020-09-15 01:17:00,828 INFO L226 Difference]: Without dead ends: 133 [2020-09-15 01:17:00,828 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=618, Invalid=1638, Unknown=0, NotChecked=0, Total=2256 [2020-09-15 01:17:00,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-15 01:17:00,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 77. [2020-09-15 01:17:00,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-15 01:17:00,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 191 transitions. [2020-09-15 01:17:00,831 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 191 transitions. Word has length 27 [2020-09-15 01:17:00,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:17:00,831 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 191 transitions. [2020-09-15 01:17:00,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 01:17:00,831 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 191 transitions. [2020-09-15 01:17:00,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 01:17:00,832 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:17:00,832 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:17:01,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:17:01,032 INFO L427 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:17:01,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:17:01,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1550090167, now seen corresponding path program 202 times [2020-09-15 01:17:01,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:17:01,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276442965] [2020-09-15 01:17:01,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:17:01,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:17:01,651 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:17:01,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276442965] [2020-09-15 01:17:01,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514843770] [2020-09-15 01:17:01,652 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:17:01,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:17:01,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:17:01,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 01:17:01,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:17:01,766 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:17:01,786 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:17:01,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:17:01,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-15 01:17:01,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607576276] [2020-09-15 01:17:01,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 01:17:01,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:17:01,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 01:17:01,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:17:01,787 INFO L87 Difference]: Start difference. First operand 77 states and 191 transitions. Second operand 24 states. [2020-09-15 01:17:03,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:17:03,137 INFO L93 Difference]: Finished difference Result 136 states and 309 transitions. [2020-09-15 01:17:03,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 01:17:03,139 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-15 01:17:03,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:17:03,139 INFO L225 Difference]: With dead ends: 136 [2020-09-15 01:17:03,140 INFO L226 Difference]: Without dead ends: 130 [2020-09-15 01:17:03,140 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=622, Invalid=1730, Unknown=0, NotChecked=0, Total=2352 [2020-09-15 01:17:03,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-09-15 01:17:03,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 76. [2020-09-15 01:17:03,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-15 01:17:03,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 189 transitions. [2020-09-15 01:17:03,142 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 189 transitions. Word has length 27 [2020-09-15 01:17:03,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:17:03,142 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 189 transitions. [2020-09-15 01:17:03,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 01:17:03,142 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 189 transitions. [2020-09-15 01:17:03,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 01:17:03,143 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:17:03,143 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:17:03,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2020-09-15 01:17:03,344 INFO L427 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:17:03,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:17:03,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1602366773, now seen corresponding path program 203 times [2020-09-15 01:17:03,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:17:03,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879797763] [2020-09-15 01:17:03,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:17:03,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:17:03,947 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:17:03,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879797763] [2020-09-15 01:17:03,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236901295] [2020-09-15 01:17:03,948 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:17:04,022 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-15 01:17:04,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:17:04,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 01:17:04,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:17:04,050 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:17:04,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:17:04,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-15 01:17:04,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035245312] [2020-09-15 01:17:04,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 01:17:04,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:17:04,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 01:17:04,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:17:04,051 INFO L87 Difference]: Start difference. First operand 76 states and 189 transitions. Second operand 23 states. [2020-09-15 01:17:05,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:17:05,335 INFO L93 Difference]: Finished difference Result 137 states and 313 transitions. [2020-09-15 01:17:05,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-15 01:17:05,336 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-15 01:17:05,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:17:05,337 INFO L225 Difference]: With dead ends: 137 [2020-09-15 01:17:05,337 INFO L226 Difference]: Without dead ends: 131 [2020-09-15 01:17:05,337 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=654, Invalid=1796, Unknown=0, NotChecked=0, Total=2450 [2020-09-15 01:17:05,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-15 01:17:05,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 79. [2020-09-15 01:17:05,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-15 01:17:05,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 197 transitions. [2020-09-15 01:17:05,340 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 197 transitions. Word has length 27 [2020-09-15 01:17:05,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:17:05,341 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 197 transitions. [2020-09-15 01:17:05,341 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 01:17:05,341 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 197 transitions. [2020-09-15 01:17:05,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 01:17:05,341 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:17:05,341 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:17:05,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:17:05,542 INFO L427 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:17:05,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:17:05,543 INFO L82 PathProgramCache]: Analyzing trace with hash -816351079, now seen corresponding path program 204 times [2020-09-15 01:17:05,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:17:05,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437365347] [2020-09-15 01:17:05,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:17:05,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:17:06,138 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:17:06,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437365347] [2020-09-15 01:17:06,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219907503] [2020-09-15 01:17:06,139 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:17:06,217 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-15 01:17:06,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:17:06,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 01:17:06,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:17:06,262 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:17:06,283 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:17:06,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:17:06,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-15 01:17:06,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091534975] [2020-09-15 01:17:06,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 01:17:06,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:17:06,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 01:17:06,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:17:06,285 INFO L87 Difference]: Start difference. First operand 79 states and 197 transitions. Second operand 24 states. [2020-09-15 01:17:07,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:17:07,708 INFO L93 Difference]: Finished difference Result 134 states and 307 transitions. [2020-09-15 01:17:07,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 01:17:07,710 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-15 01:17:07,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:17:07,710 INFO L225 Difference]: With dead ends: 134 [2020-09-15 01:17:07,710 INFO L226 Difference]: Without dead ends: 128 [2020-09-15 01:17:07,711 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=659, Invalid=1891, Unknown=0, NotChecked=0, Total=2550 [2020-09-15 01:17:07,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-15 01:17:07,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 78. [2020-09-15 01:17:07,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-15 01:17:07,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 195 transitions. [2020-09-15 01:17:07,713 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 195 transitions. Word has length 27 [2020-09-15 01:17:07,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:17:07,714 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 195 transitions. [2020-09-15 01:17:07,714 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 01:17:07,714 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 195 transitions. [2020-09-15 01:17:07,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 01:17:07,714 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:17:07,714 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:17:07,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2020-09-15 01:17:07,918 INFO L427 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:17:07,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:17:07,919 INFO L82 PathProgramCache]: Analyzing trace with hash -128029289, now seen corresponding path program 205 times [2020-09-15 01:17:07,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:17:07,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310118319] [2020-09-15 01:17:07,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:17:07,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:17:08,478 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:17:08,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310118319] [2020-09-15 01:17:08,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606760122] [2020-09-15 01:17:08,479 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:17:08,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:17:08,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 01:17:08,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:17:08,578 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:17:08,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:17:08,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-15 01:17:08,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917752073] [2020-09-15 01:17:08,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 01:17:08,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:17:08,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 01:17:08,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:17:08,580 INFO L87 Difference]: Start difference. First operand 78 states and 195 transitions. Second operand 23 states. [2020-09-15 01:17:09,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:17:09,922 INFO L93 Difference]: Finished difference Result 135 states and 311 transitions. [2020-09-15 01:17:09,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-15 01:17:09,924 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-15 01:17:09,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:17:09,924 INFO L225 Difference]: With dead ends: 135 [2020-09-15 01:17:09,924 INFO L226 Difference]: Without dead ends: 129 [2020-09-15 01:17:09,925 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=706, Invalid=1946, Unknown=0, NotChecked=0, Total=2652 [2020-09-15 01:17:09,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-09-15 01:17:09,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 81. [2020-09-15 01:17:09,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-15 01:17:09,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 203 transitions. [2020-09-15 01:17:09,927 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 203 transitions. Word has length 27 [2020-09-15 01:17:09,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:17:09,927 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 203 transitions. [2020-09-15 01:17:09,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 01:17:09,927 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 203 transitions. [2020-09-15 01:17:09,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 01:17:09,928 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:17:09,928 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:17:10,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:17:10,129 INFO L427 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:17:10,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:17:10,129 INFO L82 PathProgramCache]: Analyzing trace with hash 857162235, now seen corresponding path program 206 times [2020-09-15 01:17:10,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:17:10,130 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929280555] [2020-09-15 01:17:10,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:17:10,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:17:10,743 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:17:10,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929280555] [2020-09-15 01:17:10,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354401022] [2020-09-15 01:17:10,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:17:10,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:17:10,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:17:10,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 01:17:10,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:17:10,870 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:17:10,904 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:17:10,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:17:10,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-15 01:17:10,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016187591] [2020-09-15 01:17:10,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 01:17:10,905 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:17:10,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 01:17:10,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:17:10,905 INFO L87 Difference]: Start difference. First operand 81 states and 203 transitions. Second operand 24 states. [2020-09-15 01:17:12,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:17:12,861 INFO L93 Difference]: Finished difference Result 132 states and 305 transitions. [2020-09-15 01:17:12,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-15 01:17:12,863 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-15 01:17:12,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:17:12,864 INFO L225 Difference]: With dead ends: 132 [2020-09-15 01:17:12,864 INFO L226 Difference]: Without dead ends: 126 [2020-09-15 01:17:12,865 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=712, Invalid=2044, Unknown=0, NotChecked=0, Total=2756 [2020-09-15 01:17:12,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-09-15 01:17:12,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 80. [2020-09-15 01:17:12,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-15 01:17:12,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 201 transitions. [2020-09-15 01:17:12,867 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 201 transitions. Word has length 27 [2020-09-15 01:17:12,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:17:12,867 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 201 transitions. [2020-09-15 01:17:12,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 01:17:12,868 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 201 transitions. [2020-09-15 01:17:12,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 01:17:12,868 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:17:12,868 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:17:13,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:17:13,072 INFO L427 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:17:13,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:17:13,072 INFO L82 PathProgramCache]: Analyzing trace with hash -759996807, now seen corresponding path program 207 times [2020-09-15 01:17:13,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:17:13,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788525547] [2020-09-15 01:17:13,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:17:13,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:17:13,660 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:17:13,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788525547] [2020-09-15 01:17:13,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719668272] [2020-09-15 01:17:13,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:17:13,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-15 01:17:13,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:17:13,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 01:17:13,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:17:13,777 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:17:13,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:17:13,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-15 01:17:13,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943219361] [2020-09-15 01:17:13,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 01:17:13,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:17:13,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 01:17:13,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:17:13,779 INFO L87 Difference]: Start difference. First operand 80 states and 201 transitions. Second operand 23 states. [2020-09-15 01:17:15,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:17:15,456 INFO L93 Difference]: Finished difference Result 133 states and 309 transitions. [2020-09-15 01:17:15,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-15 01:17:15,457 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-15 01:17:15,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:17:15,458 INFO L225 Difference]: With dead ends: 133 [2020-09-15 01:17:15,458 INFO L226 Difference]: Without dead ends: 127 [2020-09-15 01:17:15,459 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=774, Invalid=2088, Unknown=0, NotChecked=0, Total=2862 [2020-09-15 01:17:15,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-09-15 01:17:15,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 83. [2020-09-15 01:17:15,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-15 01:17:15,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 209 transitions. [2020-09-15 01:17:15,461 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 209 transitions. Word has length 27 [2020-09-15 01:17:15,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:17:15,461 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 209 transitions. [2020-09-15 01:17:15,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 01:17:15,462 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 209 transitions. [2020-09-15 01:17:15,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 01:17:15,462 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:17:15,462 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:17:15,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:17:15,663 INFO L427 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:17:15,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:17:15,664 INFO L82 PathProgramCache]: Analyzing trace with hash 496892893, now seen corresponding path program 208 times [2020-09-15 01:17:15,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:17:15,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765071681] [2020-09-15 01:17:15,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:17:15,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:17:16,156 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:17:16,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765071681] [2020-09-15 01:17:16,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980219112] [2020-09-15 01:17:16,157 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:17:16,224 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:17:16,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:17:16,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 01:17:16,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:17:16,263 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:17:16,289 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:17:16,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:17:16,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-15 01:17:16,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604666165] [2020-09-15 01:17:16,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 01:17:16,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:17:16,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 01:17:16,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:17:16,291 INFO L87 Difference]: Start difference. First operand 83 states and 209 transitions. Second operand 24 states. [2020-09-15 01:17:18,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:17:18,082 INFO L93 Difference]: Finished difference Result 130 states and 303 transitions. [2020-09-15 01:17:18,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-15 01:17:18,083 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-15 01:17:18,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:17:18,083 INFO L225 Difference]: With dead ends: 130 [2020-09-15 01:17:18,084 INFO L226 Difference]: Without dead ends: 124 [2020-09-15 01:17:18,084 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=781, Invalid=2189, Unknown=0, NotChecked=0, Total=2970 [2020-09-15 01:17:18,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-09-15 01:17:18,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 82. [2020-09-15 01:17:18,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-15 01:17:18,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 207 transitions. [2020-09-15 01:17:18,087 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 207 transitions. Word has length 27 [2020-09-15 01:17:18,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:17:18,087 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 207 transitions. [2020-09-15 01:17:18,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 01:17:18,087 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 207 transitions. [2020-09-15 01:17:18,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 01:17:18,087 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:17:18,087 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:17:18,288 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:17:18,288 INFO L427 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:17:18,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:17:18,289 INFO L82 PathProgramCache]: Analyzing trace with hash 2113085403, now seen corresponding path program 209 times [2020-09-15 01:17:18,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:17:18,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154925283] [2020-09-15 01:17:18,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:17:18,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:17:18,755 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:17:18,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154925283] [2020-09-15 01:17:18,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145485528] [2020-09-15 01:17:18,755 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:17:18,827 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-15 01:17:18,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:17:18,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 01:17:18,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:17:18,856 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:17:18,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:17:18,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-15 01:17:18,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766173808] [2020-09-15 01:17:18,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 01:17:18,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:17:18,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 01:17:18,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:17:18,857 INFO L87 Difference]: Start difference. First operand 82 states and 207 transitions. Second operand 23 states. [2020-09-15 01:17:20,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:17:20,552 INFO L93 Difference]: Finished difference Result 131 states and 307 transitions. [2020-09-15 01:17:20,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-15 01:17:20,554 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-15 01:17:20,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:17:20,554 INFO L225 Difference]: With dead ends: 131 [2020-09-15 01:17:20,554 INFO L226 Difference]: Without dead ends: 125 [2020-09-15 01:17:20,555 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=858, Invalid=2222, Unknown=0, NotChecked=0, Total=3080 [2020-09-15 01:17:20,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-15 01:17:20,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 85. [2020-09-15 01:17:20,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-15 01:17:20,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 215 transitions. [2020-09-15 01:17:20,557 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 215 transitions. Word has length 27 [2020-09-15 01:17:20,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:17:20,557 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 215 transitions. [2020-09-15 01:17:20,557 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 01:17:20,557 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 215 transitions. [2020-09-15 01:17:20,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 01:17:20,558 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:17:20,558 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:17:20,761 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2020-09-15 01:17:20,761 INFO L427 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:17:20,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:17:20,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1662138817, now seen corresponding path program 210 times [2020-09-15 01:17:20,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:17:20,762 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513098481] [2020-09-15 01:17:20,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:17:20,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:17:21,237 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:17:21,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513098481] [2020-09-15 01:17:21,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123409461] [2020-09-15 01:17:21,237 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:17:21,314 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-15 01:17:21,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:17:21,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 01:17:21,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:17:21,364 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:17:21,392 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:17:21,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:17:21,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-15 01:17:21,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912465630] [2020-09-15 01:17:21,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 01:17:21,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:17:21,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 01:17:21,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:17:21,393 INFO L87 Difference]: Start difference. First operand 85 states and 215 transitions. Second operand 24 states. [2020-09-15 01:17:23,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:17:23,275 INFO L93 Difference]: Finished difference Result 128 states and 301 transitions. [2020-09-15 01:17:23,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-15 01:17:23,277 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-15 01:17:23,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:17:23,278 INFO L225 Difference]: With dead ends: 128 [2020-09-15 01:17:23,278 INFO L226 Difference]: Without dead ends: 122 [2020-09-15 01:17:23,278 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=866, Invalid=2326, Unknown=0, NotChecked=0, Total=3192 [2020-09-15 01:17:23,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-15 01:17:23,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 84. [2020-09-15 01:17:23,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-15 01:17:23,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 213 transitions. [2020-09-15 01:17:23,281 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 213 transitions. Word has length 27 [2020-09-15 01:17:23,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:17:23,281 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 213 transitions. [2020-09-15 01:17:23,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 01:17:23,281 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 213 transitions. [2020-09-15 01:17:23,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 01:17:23,282 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:17:23,282 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:17:23,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2020-09-15 01:17:23,483 INFO L427 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:17:23,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:17:23,484 INFO L82 PathProgramCache]: Analyzing trace with hash -6827587, now seen corresponding path program 211 times [2020-09-15 01:17:23,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:17:23,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336719919] [2020-09-15 01:17:23,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:17:23,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:17:24,012 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:17:24,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336719919] [2020-09-15 01:17:24,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350915993] [2020-09-15 01:17:24,013 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:17:24,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:17:24,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 01:17:24,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:17:24,115 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:17:24,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:17:24,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-15 01:17:24,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947609947] [2020-09-15 01:17:24,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 01:17:24,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:17:24,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 01:17:24,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:17:24,116 INFO L87 Difference]: Start difference. First operand 84 states and 213 transitions. Second operand 23 states. [2020-09-15 01:17:25,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:17:25,806 INFO L93 Difference]: Finished difference Result 129 states and 305 transitions. [2020-09-15 01:17:25,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-15 01:17:25,808 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-15 01:17:25,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:17:25,808 INFO L225 Difference]: With dead ends: 129 [2020-09-15 01:17:25,808 INFO L226 Difference]: Without dead ends: 123 [2020-09-15 01:17:25,809 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=958, Invalid=2348, Unknown=0, NotChecked=0, Total=3306 [2020-09-15 01:17:25,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-15 01:17:25,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 87. [2020-09-15 01:17:25,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-15 01:17:25,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-15 01:17:25,811 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 27 [2020-09-15 01:17:25,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:17:25,812 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-15 01:17:25,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 01:17:25,812 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-15 01:17:25,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 01:17:25,812 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:17:25,812 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:17:26,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2020-09-15 01:17:26,013 INFO L427 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:17:26,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:17:26,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1726955231, now seen corresponding path program 212 times [2020-09-15 01:17:26,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:17:26,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478625207] [2020-09-15 01:17:26,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:17:26,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:17:26,503 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:17:26,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478625207] [2020-09-15 01:17:26,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308324446] [2020-09-15 01:17:26,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:17:26,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:17:26,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:17:26,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 01:17:26,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:17:26,598 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:17:26,619 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:17:26,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:17:26,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-15 01:17:26,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332760531] [2020-09-15 01:17:26,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 01:17:26,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:17:26,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 01:17:26,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:17:26,621 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 24 states. [2020-09-15 01:17:28,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:17:28,887 INFO L93 Difference]: Finished difference Result 126 states and 299 transitions. [2020-09-15 01:17:28,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-15 01:17:28,888 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-15 01:17:28,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:17:28,889 INFO L225 Difference]: With dead ends: 126 [2020-09-15 01:17:28,889 INFO L226 Difference]: Without dead ends: 120 [2020-09-15 01:17:28,889 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=967, Invalid=2455, Unknown=0, NotChecked=0, Total=3422 [2020-09-15 01:17:28,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-15 01:17:28,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 86. [2020-09-15 01:17:28,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-15 01:17:28,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-15 01:17:28,892 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 27 [2020-09-15 01:17:28,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:17:28,892 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-15 01:17:28,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 01:17:28,893 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-15 01:17:28,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 01:17:28,893 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:17:28,893 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:17:29,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2020-09-15 01:17:29,094 INFO L427 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:17:29,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:17:29,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1255959521, now seen corresponding path program 213 times [2020-09-15 01:17:29,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:17:29,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298620136] [2020-09-15 01:17:29,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:17:29,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:17:29,619 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:17:29,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298620136] [2020-09-15 01:17:29,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664612739] [2020-09-15 01:17:29,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:17:29,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-15 01:17:29,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:17:29,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 01:17:29,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:17:29,736 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:17:29,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:17:29,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-15 01:17:29,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425241171] [2020-09-15 01:17:29,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 01:17:29,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:17:29,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 01:17:29,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:17:29,737 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 23 states. [2020-09-15 01:17:31,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:17:31,637 INFO L93 Difference]: Finished difference Result 127 states and 303 transitions. [2020-09-15 01:17:31,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-09-15 01:17:31,639 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-15 01:17:31,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:17:31,639 INFO L225 Difference]: With dead ends: 127 [2020-09-15 01:17:31,640 INFO L226 Difference]: Without dead ends: 121 [2020-09-15 01:17:31,640 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1074, Invalid=2466, Unknown=0, NotChecked=0, Total=3540 [2020-09-15 01:17:31,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-15 01:17:31,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 89. [2020-09-15 01:17:31,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-09-15 01:17:31,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 227 transitions. [2020-09-15 01:17:31,643 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 227 transitions. Word has length 27 [2020-09-15 01:17:31,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:17:31,643 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 227 transitions. [2020-09-15 01:17:31,643 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 01:17:31,643 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 227 transitions. [2020-09-15 01:17:31,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 01:17:31,643 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:17:31,644 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:17:31,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:17:31,844 INFO L427 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:17:31,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:17:31,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1239872381, now seen corresponding path program 214 times [2020-09-15 01:17:31,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:17:31,846 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019552763] [2020-09-15 01:17:31,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:17:31,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:17:32,379 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:17:32,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019552763] [2020-09-15 01:17:32,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704926295] [2020-09-15 01:17:32,380 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:17:32,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:17:32,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:17:32,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 01:17:32,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:17:32,500 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:17:32,536 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:17:32,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:17:32,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-15 01:17:32,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069303318] [2020-09-15 01:17:32,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 01:17:32,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:17:32,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 01:17:32,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:17:32,538 INFO L87 Difference]: Start difference. First operand 89 states and 227 transitions. Second operand 24 states. [2020-09-15 01:17:34,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:17:34,933 INFO L93 Difference]: Finished difference Result 124 states and 297 transitions. [2020-09-15 01:17:34,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-15 01:17:34,935 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-15 01:17:34,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:17:34,935 INFO L225 Difference]: With dead ends: 124 [2020-09-15 01:17:34,935 INFO L226 Difference]: Without dead ends: 118 [2020-09-15 01:17:34,936 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1084, Invalid=2576, Unknown=0, NotChecked=0, Total=3660 [2020-09-15 01:17:34,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-15 01:17:34,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 88. [2020-09-15 01:17:34,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-15 01:17:34,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-09-15 01:17:34,939 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 27 [2020-09-15 01:17:34,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:17:34,939 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-09-15 01:17:34,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 01:17:34,940 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-09-15 01:17:34,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 01:17:34,940 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:17:34,940 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:17:35,148 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2020-09-15 01:17:35,149 INFO L427 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:17:35,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:17:35,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1239382271, now seen corresponding path program 215 times [2020-09-15 01:17:35,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:17:35,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406349544] [2020-09-15 01:17:35,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:17:35,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:17:35,590 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:17:35,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406349544] [2020-09-15 01:17:35,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637547331] [2020-09-15 01:17:35,591 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:17:35,663 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-15 01:17:35,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:17:35,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 01:17:35,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:17:35,710 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:17:35,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:17:35,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-15 01:17:35,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482590569] [2020-09-15 01:17:35,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 01:17:35,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:17:35,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 01:17:35,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:17:35,711 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 23 states. [2020-09-15 01:17:37,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:17:37,815 INFO L93 Difference]: Finished difference Result 144 states and 347 transitions. [2020-09-15 01:17:37,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-15 01:17:37,817 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-15 01:17:37,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:17:37,817 INFO L225 Difference]: With dead ends: 144 [2020-09-15 01:17:37,817 INFO L226 Difference]: Without dead ends: 138 [2020-09-15 01:17:37,818 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1206, Invalid=2576, Unknown=0, NotChecked=0, Total=3782 [2020-09-15 01:17:37,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-09-15 01:17:37,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 94. [2020-09-15 01:17:37,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-15 01:17:37,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 245 transitions. [2020-09-15 01:17:37,820 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 245 transitions. Word has length 27 [2020-09-15 01:17:37,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:17:37,820 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 245 transitions. [2020-09-15 01:17:37,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 01:17:37,821 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 245 transitions. [2020-09-15 01:17:37,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 01:17:37,821 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:17:37,821 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:17:38,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:17:38,022 INFO L427 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:17:38,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:17:38,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1239365531, now seen corresponding path program 216 times [2020-09-15 01:17:38,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:17:38,023 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849081006] [2020-09-15 01:17:38,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:17:38,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:17:38,529 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:17:38,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849081006] [2020-09-15 01:17:38,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459409780] [2020-09-15 01:17:38,530 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:17:38,610 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-15 01:17:38,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:17:38,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 01:17:38,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:17:38,662 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:17:38,698 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:17:38,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:17:38,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-15 01:17:38,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725090005] [2020-09-15 01:17:38,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 01:17:38,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:17:38,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 01:17:38,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:17:38,700 INFO L87 Difference]: Start difference. First operand 94 states and 245 transitions. Second operand 24 states. [2020-09-15 01:17:41,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:17:41,171 INFO L93 Difference]: Finished difference Result 125 states and 303 transitions. [2020-09-15 01:17:41,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-15 01:17:41,173 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-15 01:17:41,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:17:41,173 INFO L225 Difference]: With dead ends: 125 [2020-09-15 01:17:41,174 INFO L226 Difference]: Without dead ends: 117 [2020-09-15 01:17:41,174 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1217, Invalid=2689, Unknown=0, NotChecked=0, Total=3906 [2020-09-15 01:17:41,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-15 01:17:41,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 91. [2020-09-15 01:17:41,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-15 01:17:41,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 233 transitions. [2020-09-15 01:17:41,177 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 233 transitions. Word has length 27 [2020-09-15 01:17:41,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:17:41,177 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 233 transitions. [2020-09-15 01:17:41,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 01:17:41,177 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 233 transitions. [2020-09-15 01:17:41,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 01:17:41,177 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:17:41,177 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:17:41,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2020-09-15 01:17:41,378 INFO L427 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:17:41,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:17:41,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1945349894, now seen corresponding path program 217 times [2020-09-15 01:17:41,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:17:41,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850920025] [2020-09-15 01:17:41,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:17:41,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:17:42,114 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:17:42,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850920025] [2020-09-15 01:17:42,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937903951] [2020-09-15 01:17:42,115 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:17:42,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:17:42,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 01:17:42,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:17:42,202 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:17:42,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:17:42,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-15 01:17:42,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504642434] [2020-09-15 01:17:42,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 01:17:42,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:17:42,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 01:17:42,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:17:42,204 INFO L87 Difference]: Start difference. First operand 91 states and 233 transitions. Second operand 24 states. [2020-09-15 01:17:43,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:17:43,413 INFO L93 Difference]: Finished difference Result 144 states and 339 transitions. [2020-09-15 01:17:43,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-15 01:17:43,414 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-15 01:17:43,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:17:43,415 INFO L225 Difference]: With dead ends: 144 [2020-09-15 01:17:43,415 INFO L226 Difference]: Without dead ends: 138 [2020-09-15 01:17:43,415 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=603, Invalid=1377, Unknown=0, NotChecked=0, Total=1980 [2020-09-15 01:17:43,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-09-15 01:17:43,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 93. [2020-09-15 01:17:43,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-15 01:17:43,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-15 01:17:43,418 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-15 01:17:43,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:17:43,418 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-15 01:17:43,418 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 01:17:43,418 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-15 01:17:43,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 01:17:43,419 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:17:43,419 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:17:43,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:17:43,627 INFO L427 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:17:43,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:17:43,627 INFO L82 PathProgramCache]: Analyzing trace with hash 627867998, now seen corresponding path program 218 times [2020-09-15 01:17:43,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:17:43,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154270759] [2020-09-15 01:17:43,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:17:43,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:17:44,466 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:17:44,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154270759] [2020-09-15 01:17:44,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075801272] [2020-09-15 01:17:44,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:17:44,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:17:44,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:17:44,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 01:17:44,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:17:44,595 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:17:44,615 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:17:44,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:17:44,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-15 01:17:44,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484025570] [2020-09-15 01:17:44,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-15 01:17:44,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:17:44,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-15 01:17:44,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:17:44,617 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-15 01:17:46,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:17:46,112 INFO L93 Difference]: Finished difference Result 141 states and 333 transitions. [2020-09-15 01:17:46,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-15 01:17:46,115 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-15 01:17:46,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:17:46,115 INFO L225 Difference]: With dead ends: 141 [2020-09-15 01:17:46,115 INFO L226 Difference]: Without dead ends: 135 [2020-09-15 01:17:46,116 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=653, Invalid=1603, Unknown=0, NotChecked=0, Total=2256 [2020-09-15 01:17:46,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-09-15 01:17:46,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 92. [2020-09-15 01:17:46,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-15 01:17:46,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-15 01:17:46,118 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-15 01:17:46,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:17:46,118 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-15 01:17:46,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-15 01:17:46,118 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-15 01:17:46,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 01:17:46,119 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:17:46,119 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:17:46,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2020-09-15 01:17:46,320 INFO L427 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:17:46,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:17:46,320 INFO L82 PathProgramCache]: Analyzing trace with hash -556056612, now seen corresponding path program 219 times [2020-09-15 01:17:46,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:17:46,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049509516] [2020-09-15 01:17:46,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:17:46,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:17:47,000 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:17:47,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049509516] [2020-09-15 01:17:47,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399274052] [2020-09-15 01:17:47,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:17:47,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-15 01:17:47,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:17:47,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 01:17:47,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:17:47,110 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:17:47,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:17:47,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-15 01:17:47,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646818326] [2020-09-15 01:17:47,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 01:17:47,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:17:47,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 01:17:47,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:17:47,111 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-15 01:17:48,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:17:48,369 INFO L93 Difference]: Finished difference Result 138 states and 327 transitions. [2020-09-15 01:17:48,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-15 01:17:48,371 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-15 01:17:48,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:17:48,372 INFO L225 Difference]: With dead ends: 138 [2020-09-15 01:17:48,372 INFO L226 Difference]: Without dead ends: 132 [2020-09-15 01:17:48,372 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=608, Invalid=1554, Unknown=0, NotChecked=0, Total=2162 [2020-09-15 01:17:48,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-09-15 01:17:48,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 93. [2020-09-15 01:17:48,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-15 01:17:48,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-15 01:17:48,374 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-15 01:17:48,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:17:48,374 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-15 01:17:48,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 01:17:48,375 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-15 01:17:48,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 01:17:48,375 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:17:48,375 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:17:48,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:17:48,576 INFO L427 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:17:48,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:17:48,577 INFO L82 PathProgramCache]: Analyzing trace with hash -2104215232, now seen corresponding path program 220 times [2020-09-15 01:17:48,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:17:48,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084446075] [2020-09-15 01:17:48,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:17:48,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:17:49,291 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:17:49,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084446075] [2020-09-15 01:17:49,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609989488] [2020-09-15 01:17:49,292 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:17:49,359 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:17:49,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:17:49,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 01:17:49,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:17:49,405 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:17:49,420 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:17:49,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:17:49,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-15 01:17:49,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400766376] [2020-09-15 01:17:49,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-15 01:17:49,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:17:49,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-15 01:17:49,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:17:49,422 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-15 01:17:50,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:17:50,974 INFO L93 Difference]: Finished difference Result 137 states and 325 transitions. [2020-09-15 01:17:50,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 01:17:50,976 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-15 01:17:50,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:17:50,977 INFO L225 Difference]: With dead ends: 137 [2020-09-15 01:17:50,977 INFO L226 Difference]: Without dead ends: 131 [2020-09-15 01:17:50,978 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=665, Invalid=1785, Unknown=0, NotChecked=0, Total=2450 [2020-09-15 01:17:50,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-15 01:17:50,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 92. [2020-09-15 01:17:50,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-15 01:17:50,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-15 01:17:50,980 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-15 01:17:50,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:17:50,980 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-15 01:17:50,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-15 01:17:50,981 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-15 01:17:50,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 01:17:50,981 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:17:50,981 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:17:51,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2020-09-15 01:17:51,182 INFO L427 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:17:51,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:17:51,183 INFO L82 PathProgramCache]: Analyzing trace with hash 888962878, now seen corresponding path program 221 times [2020-09-15 01:17:51,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:17:51,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504679796] [2020-09-15 01:17:51,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:17:51,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:17:51,811 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:17:51,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504679796] [2020-09-15 01:17:51,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464516665] [2020-09-15 01:17:51,812 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:17:51,877 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-15 01:17:51,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:17:51,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 01:17:51,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:17:51,906 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:17:51,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:17:51,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-15 01:17:51,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059017892] [2020-09-15 01:17:51,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 01:17:51,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:17:51,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 01:17:51,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:17:51,907 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-15 01:17:53,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:17:53,377 INFO L93 Difference]: Finished difference Result 134 states and 319 transitions. [2020-09-15 01:17:53,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-15 01:17:53,380 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-15 01:17:53,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:17:53,380 INFO L225 Difference]: With dead ends: 134 [2020-09-15 01:17:53,380 INFO L226 Difference]: Without dead ends: 128 [2020-09-15 01:17:53,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=629, Invalid=1723, Unknown=0, NotChecked=0, Total=2352 [2020-09-15 01:17:53,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-15 01:17:53,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 93. [2020-09-15 01:17:53,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-15 01:17:53,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-15 01:17:53,383 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-15 01:17:53,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:17:53,384 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-15 01:17:53,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 01:17:53,384 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-15 01:17:53,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 01:17:53,385 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:17:53,385 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:17:53,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2020-09-15 01:17:53,593 INFO L427 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:17:53,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:17:53,593 INFO L82 PathProgramCache]: Analyzing trace with hash 78414242, now seen corresponding path program 222 times [2020-09-15 01:17:53,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:17:53,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563996127] [2020-09-15 01:17:53,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:17:53,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:17:54,255 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:17:54,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563996127] [2020-09-15 01:17:54,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396732969] [2020-09-15 01:17:54,256 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:17:54,329 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-15 01:17:54,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:17:54,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 01:17:54,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:17:54,393 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:17:54,416 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:17:54,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:17:54,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-15 01:17:54,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830028624] [2020-09-15 01:17:54,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-15 01:17:54,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:17:54,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-15 01:17:54,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:17:54,418 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-15 01:17:56,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:17:56,134 INFO L93 Difference]: Finished difference Result 133 states and 317 transitions. [2020-09-15 01:17:56,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 01:17:56,137 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-15 01:17:56,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:17:56,138 INFO L225 Difference]: With dead ends: 133 [2020-09-15 01:17:56,138 INFO L226 Difference]: Without dead ends: 127 [2020-09-15 01:17:56,138 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=693, Invalid=1959, Unknown=0, NotChecked=0, Total=2652 [2020-09-15 01:17:56,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-09-15 01:17:56,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 92. [2020-09-15 01:17:56,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-15 01:17:56,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-15 01:17:56,141 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-15 01:17:56,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:17:56,141 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-15 01:17:56,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-15 01:17:56,141 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-15 01:17:56,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 01:17:56,142 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:17:56,142 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:17:56,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2020-09-15 01:17:56,349 INFO L427 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:17:56,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:17:56,350 INFO L82 PathProgramCache]: Analyzing trace with hash 130690848, now seen corresponding path program 223 times [2020-09-15 01:17:56,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:17:56,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909924707] [2020-09-15 01:17:56,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:17:56,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:17:57,012 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:17:57,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909924707] [2020-09-15 01:17:57,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626362518] [2020-09-15 01:17:57,013 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:17:57,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:17:57,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 01:17:57,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:17:57,111 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:17:57,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:17:57,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-15 01:17:57,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067574733] [2020-09-15 01:17:57,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 01:17:57,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:17:57,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 01:17:57,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:17:57,113 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-15 01:17:58,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:17:58,666 INFO L93 Difference]: Finished difference Result 130 states and 311 transitions. [2020-09-15 01:17:58,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-15 01:17:58,668 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-15 01:17:58,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:17:58,668 INFO L225 Difference]: With dead ends: 130 [2020-09-15 01:17:58,668 INFO L226 Difference]: Without dead ends: 124 [2020-09-15 01:17:58,669 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=666, Invalid=1884, Unknown=0, NotChecked=0, Total=2550 [2020-09-15 01:17:58,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-09-15 01:17:58,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 93. [2020-09-15 01:17:58,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-15 01:17:58,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-15 01:17:58,671 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-15 01:17:58,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:17:58,671 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-15 01:17:58,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 01:17:58,672 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-15 01:17:58,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 01:17:58,672 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:17:58,672 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:17:58,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:17:58,873 INFO L427 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:17:58,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:17:58,874 INFO L82 PathProgramCache]: Analyzing trace with hash 2006940292, now seen corresponding path program 224 times [2020-09-15 01:17:58,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:17:58,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358541397] [2020-09-15 01:17:58,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:17:58,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:17:59,526 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:17:59,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358541397] [2020-09-15 01:17:59,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432150677] [2020-09-15 01:17:59,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:17:59,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:17:59,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:17:59,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 01:17:59,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:17:59,661 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:17:59,688 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:17:59,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:17:59,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-15 01:17:59,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556472686] [2020-09-15 01:17:59,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-15 01:17:59,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:17:59,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-15 01:17:59,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:17:59,690 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-15 01:18:01,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:01,852 INFO L93 Difference]: Finished difference Result 129 states and 309 transitions. [2020-09-15 01:18:01,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-15 01:18:01,855 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-15 01:18:01,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:01,855 INFO L225 Difference]: With dead ends: 129 [2020-09-15 01:18:01,855 INFO L226 Difference]: Without dead ends: 123 [2020-09-15 01:18:01,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=737, Invalid=2125, Unknown=0, NotChecked=0, Total=2862 [2020-09-15 01:18:01,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-15 01:18:01,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 92. [2020-09-15 01:18:01,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-15 01:18:01,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-15 01:18:01,859 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-15 01:18:01,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:01,859 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-15 01:18:01,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-15 01:18:01,859 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-15 01:18:01,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 01:18:01,859 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:01,859 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:02,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2020-09-15 01:18:02,060 INFO L427 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:02,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:02,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1599705214, now seen corresponding path program 225 times [2020-09-15 01:18:02,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:02,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115676310] [2020-09-15 01:18:02,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:02,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:02,718 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:02,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115676310] [2020-09-15 01:18:02,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754176963] [2020-09-15 01:18:02,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:02,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-15 01:18:02,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:02,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 01:18:02,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:02,829 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:02,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:02,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-15 01:18:02,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675116201] [2020-09-15 01:18:02,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 01:18:02,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:02,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 01:18:02,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:18:02,831 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-15 01:18:04,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:04,483 INFO L93 Difference]: Finished difference Result 126 states and 303 transitions. [2020-09-15 01:18:04,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-15 01:18:04,485 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-15 01:18:04,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:04,486 INFO L225 Difference]: With dead ends: 126 [2020-09-15 01:18:04,486 INFO L226 Difference]: Without dead ends: 120 [2020-09-15 01:18:04,486 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=719, Invalid=2037, Unknown=0, NotChecked=0, Total=2756 [2020-09-15 01:18:04,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-15 01:18:04,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 93. [2020-09-15 01:18:04,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-15 01:18:04,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-15 01:18:04,489 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-15 01:18:04,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:04,490 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-15 01:18:04,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 01:18:04,490 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-15 01:18:04,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 01:18:04,490 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:04,490 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:04,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:04,691 INFO L427 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:04,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:04,692 INFO L82 PathProgramCache]: Analyzing trace with hash -614513690, now seen corresponding path program 226 times [2020-09-15 01:18:04,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:04,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646696809] [2020-09-15 01:18:04,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:04,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:05,342 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:05,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646696809] [2020-09-15 01:18:05,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711770215] [2020-09-15 01:18:05,343 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:05,417 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:18:05,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:05,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 01:18:05,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:05,475 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:18:05,502 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:05,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:05,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-15 01:18:05,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674643895] [2020-09-15 01:18:05,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-15 01:18:05,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:05,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-15 01:18:05,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:18:05,503 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-15 01:18:07,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:07,578 INFO L93 Difference]: Finished difference Result 125 states and 301 transitions. [2020-09-15 01:18:07,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-15 01:18:07,580 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-15 01:18:07,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:07,581 INFO L225 Difference]: With dead ends: 125 [2020-09-15 01:18:07,581 INFO L226 Difference]: Without dead ends: 119 [2020-09-15 01:18:07,581 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=797, Invalid=2283, Unknown=0, NotChecked=0, Total=3080 [2020-09-15 01:18:07,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-15 01:18:07,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 92. [2020-09-15 01:18:07,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-15 01:18:07,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-15 01:18:07,584 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-15 01:18:07,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:07,584 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-15 01:18:07,584 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-15 01:18:07,584 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-15 01:18:07,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 01:18:07,584 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:07,585 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:07,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2020-09-15 01:18:07,788 INFO L427 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:07,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:07,789 INFO L82 PathProgramCache]: Analyzing trace with hash 2063294564, now seen corresponding path program 227 times [2020-09-15 01:18:07,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:07,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319317395] [2020-09-15 01:18:07,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:07,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:08,412 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:08,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319317395] [2020-09-15 01:18:08,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306212835] [2020-09-15 01:18:08,413 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:08,486 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-15 01:18:08,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:08,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 01:18:08,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:08,523 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:08,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:08,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-15 01:18:08,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145232017] [2020-09-15 01:18:08,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 01:18:08,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:08,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 01:18:08,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:18:08,525 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-15 01:18:10,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:10,306 INFO L93 Difference]: Finished difference Result 122 states and 295 transitions. [2020-09-15 01:18:10,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-15 01:18:10,309 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-15 01:18:10,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:10,310 INFO L225 Difference]: With dead ends: 122 [2020-09-15 01:18:10,310 INFO L226 Difference]: Without dead ends: 116 [2020-09-15 01:18:10,310 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=788, Invalid=2182, Unknown=0, NotChecked=0, Total=2970 [2020-09-15 01:18:10,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-09-15 01:18:10,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 93. [2020-09-15 01:18:10,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-15 01:18:10,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-15 01:18:10,313 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-15 01:18:10,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:10,313 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-15 01:18:10,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 01:18:10,313 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-15 01:18:10,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 01:18:10,313 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:10,314 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:10,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:10,515 INFO L427 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:10,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:10,515 INFO L82 PathProgramCache]: Analyzing trace with hash -974783032, now seen corresponding path program 228 times [2020-09-15 01:18:10,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:10,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019077752] [2020-09-15 01:18:10,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:10,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:11,161 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:11,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019077752] [2020-09-15 01:18:11,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97395035] [2020-09-15 01:18:11,162 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:11,238 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-15 01:18:11,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:11,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 01:18:11,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:11,288 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:18:11,317 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:11,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:11,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-15 01:18:11,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542679874] [2020-09-15 01:18:11,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-15 01:18:11,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:11,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-15 01:18:11,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:18:11,319 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-15 01:18:13,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:13,603 INFO L93 Difference]: Finished difference Result 121 states and 293 transitions. [2020-09-15 01:18:13,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-15 01:18:13,606 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-15 01:18:13,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:13,606 INFO L225 Difference]: With dead ends: 121 [2020-09-15 01:18:13,606 INFO L226 Difference]: Without dead ends: 115 [2020-09-15 01:18:13,607 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=873, Invalid=2433, Unknown=0, NotChecked=0, Total=3306 [2020-09-15 01:18:13,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-15 01:18:13,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 92. [2020-09-15 01:18:13,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-15 01:18:13,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-15 01:18:13,610 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-15 01:18:13,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:13,610 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-15 01:18:13,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-15 01:18:13,610 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-15 01:18:13,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 01:18:13,610 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:13,610 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:13,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable229 [2020-09-15 01:18:13,811 INFO L427 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:13,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:13,812 INFO L82 PathProgramCache]: Analyzing trace with hash 641409478, now seen corresponding path program 229 times [2020-09-15 01:18:13,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:13,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375611494] [2020-09-15 01:18:13,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:13,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:14,387 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:14,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375611494] [2020-09-15 01:18:14,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870874833] [2020-09-15 01:18:14,388 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:14,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:14,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 01:18:14,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:14,494 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:14,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:14,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-15 01:18:14,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409642235] [2020-09-15 01:18:14,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 01:18:14,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:14,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 01:18:14,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:18:14,495 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-15 01:18:16,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:16,408 INFO L93 Difference]: Finished difference Result 118 states and 287 transitions. [2020-09-15 01:18:16,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-15 01:18:16,410 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-15 01:18:16,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:16,411 INFO L225 Difference]: With dead ends: 118 [2020-09-15 01:18:16,411 INFO L226 Difference]: Without dead ends: 112 [2020-09-15 01:18:16,412 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=873, Invalid=2319, Unknown=0, NotChecked=0, Total=3192 [2020-09-15 01:18:16,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-15 01:18:16,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 93. [2020-09-15 01:18:16,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-15 01:18:16,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-15 01:18:16,414 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-15 01:18:16,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:16,414 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-15 01:18:16,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 01:18:16,414 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-15 01:18:16,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 01:18:16,414 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:16,415 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:16,615 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:16,616 INFO L427 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:16,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:16,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1161152554, now seen corresponding path program 230 times [2020-09-15 01:18:16,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:16,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948801542] [2020-09-15 01:18:16,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:16,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:17,241 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:17,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948801542] [2020-09-15 01:18:17,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075702560] [2020-09-15 01:18:17,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:17,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:18:17,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:17,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 01:18:17,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:17,362 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:18:17,393 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:17,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:17,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-15 01:18:17,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057257152] [2020-09-15 01:18:17,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-15 01:18:17,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:17,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-15 01:18:17,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:18:17,395 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-15 01:18:20,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:20,077 INFO L93 Difference]: Finished difference Result 117 states and 285 transitions. [2020-09-15 01:18:20,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-15 01:18:20,079 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-15 01:18:20,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:20,080 INFO L225 Difference]: With dead ends: 117 [2020-09-15 01:18:20,080 INFO L226 Difference]: Without dead ends: 111 [2020-09-15 01:18:20,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=965, Invalid=2575, Unknown=0, NotChecked=0, Total=3540 [2020-09-15 01:18:20,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-15 01:18:20,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 92. [2020-09-15 01:18:20,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-15 01:18:20,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-15 01:18:20,082 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-15 01:18:20,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:20,082 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-15 01:18:20,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-15 01:18:20,082 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-15 01:18:20,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 01:18:20,083 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:20,083 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:20,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:20,284 INFO L427 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:20,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:20,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1478503512, now seen corresponding path program 231 times [2020-09-15 01:18:20,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:20,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461848767] [2020-09-15 01:18:20,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:20,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:20,922 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:20,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461848767] [2020-09-15 01:18:20,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957583751] [2020-09-15 01:18:20,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:21,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-15 01:18:21,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:21,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 01:18:21,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:21,047 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:21,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:21,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-15 01:18:21,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522448517] [2020-09-15 01:18:21,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 01:18:21,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:21,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 01:18:21,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:18:21,049 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-15 01:18:23,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:23,418 INFO L93 Difference]: Finished difference Result 114 states and 279 transitions. [2020-09-15 01:18:23,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-15 01:18:23,421 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-15 01:18:23,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:23,421 INFO L225 Difference]: With dead ends: 114 [2020-09-15 01:18:23,421 INFO L226 Difference]: Without dead ends: 108 [2020-09-15 01:18:23,422 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=974, Invalid=2448, Unknown=0, NotChecked=0, Total=3422 [2020-09-15 01:18:23,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-15 01:18:23,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 93. [2020-09-15 01:18:23,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-15 01:18:23,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-15 01:18:23,424 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-15 01:18:23,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:23,425 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-15 01:18:23,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 01:18:23,425 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-15 01:18:23,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 01:18:23,425 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:23,425 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:23,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2020-09-15 01:18:23,626 INFO L427 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:23,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:23,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1096336140, now seen corresponding path program 232 times [2020-09-15 01:18:23,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:23,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552449163] [2020-09-15 01:18:23,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:23,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:24,285 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:24,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552449163] [2020-09-15 01:18:24,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420574481] [2020-09-15 01:18:24,286 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:24,356 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:18:24,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:24,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 01:18:24,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:24,413 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:18:24,454 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:24,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:24,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-15 01:18:24,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118381334] [2020-09-15 01:18:24,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-15 01:18:24,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:24,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-15 01:18:24,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:18:24,456 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-15 01:18:27,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:27,475 INFO L93 Difference]: Finished difference Result 113 states and 277 transitions. [2020-09-15 01:18:27,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-15 01:18:27,477 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-15 01:18:27,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:27,478 INFO L225 Difference]: With dead ends: 113 [2020-09-15 01:18:27,478 INFO L226 Difference]: Without dead ends: 107 [2020-09-15 01:18:27,479 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1073, Invalid=2709, Unknown=0, NotChecked=0, Total=3782 [2020-09-15 01:18:27,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-15 01:18:27,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 92. [2020-09-15 01:18:27,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-15 01:18:27,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-15 01:18:27,481 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-15 01:18:27,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:27,481 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-15 01:18:27,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-15 01:18:27,481 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-15 01:18:27,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 01:18:27,482 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:27,482 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:27,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2020-09-15 01:18:27,683 INFO L427 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:27,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:27,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1567331850, now seen corresponding path program 233 times [2020-09-15 01:18:27,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:27,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547434080] [2020-09-15 01:18:27,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:27,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:28,299 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:28,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547434080] [2020-09-15 01:18:28,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196512217] [2020-09-15 01:18:28,300 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:28,373 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-15 01:18:28,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:28,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 01:18:28,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:28,425 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:28,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:28,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-15 01:18:28,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146247810] [2020-09-15 01:18:28,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 01:18:28,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:28,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 01:18:28,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:18:28,426 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-15 01:18:30,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:30,607 INFO L93 Difference]: Finished difference Result 110 states and 271 transitions. [2020-09-15 01:18:30,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-09-15 01:18:30,609 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-15 01:18:30,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:30,610 INFO L225 Difference]: With dead ends: 110 [2020-09-15 01:18:30,610 INFO L226 Difference]: Without dead ends: 104 [2020-09-15 01:18:30,610 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1091, Invalid=2569, Unknown=0, NotChecked=0, Total=3660 [2020-09-15 01:18:30,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-09-15 01:18:30,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 93. [2020-09-15 01:18:30,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-15 01:18:30,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-15 01:18:30,613 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-15 01:18:30,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:30,613 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-15 01:18:30,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 01:18:30,613 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-15 01:18:30,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 01:18:30,613 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:30,613 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:30,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2020-09-15 01:18:30,815 INFO L427 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:30,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:30,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1583418990, now seen corresponding path program 234 times [2020-09-15 01:18:30,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:30,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11200113] [2020-09-15 01:18:30,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:30,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:31,365 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:31,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11200113] [2020-09-15 01:18:31,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630006831] [2020-09-15 01:18:31,366 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:31,439 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-15 01:18:31,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:31,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 01:18:31,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:31,489 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:18:31,522 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:31,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:31,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-15 01:18:31,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337172839] [2020-09-15 01:18:31,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-15 01:18:31,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:31,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-15 01:18:31,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:18:31,524 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-15 01:18:34,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:34,614 INFO L93 Difference]: Finished difference Result 109 states and 269 transitions. [2020-09-15 01:18:34,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-15 01:18:34,616 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-15 01:18:34,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:34,617 INFO L225 Difference]: With dead ends: 109 [2020-09-15 01:18:34,617 INFO L226 Difference]: Without dead ends: 103 [2020-09-15 01:18:34,618 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1197, Invalid=2835, Unknown=0, NotChecked=0, Total=4032 [2020-09-15 01:18:34,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-15 01:18:34,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 92. [2020-09-15 01:18:34,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-15 01:18:34,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-15 01:18:34,621 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-15 01:18:34,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:34,621 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-15 01:18:34,621 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-15 01:18:34,621 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-15 01:18:34,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 01:18:34,621 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:34,621 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:34,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2020-09-15 01:18:34,822 INFO L427 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:34,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:34,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1583909100, now seen corresponding path program 235 times [2020-09-15 01:18:34,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:34,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851915434] [2020-09-15 01:18:34,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:34,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:35,364 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:35,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851915434] [2020-09-15 01:18:35,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641756406] [2020-09-15 01:18:35,365 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:35,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:35,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 01:18:35,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:35,487 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:35,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:35,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-15 01:18:35,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262746506] [2020-09-15 01:18:35,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 01:18:35,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:35,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 01:18:35,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:18:35,489 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-15 01:18:38,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:38,162 INFO L93 Difference]: Finished difference Result 125 states and 309 transitions. [2020-09-15 01:18:38,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-15 01:18:38,165 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-15 01:18:38,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:38,166 INFO L225 Difference]: With dead ends: 125 [2020-09-15 01:18:38,166 INFO L226 Difference]: Without dead ends: 119 [2020-09-15 01:18:38,166 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1029 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1224, Invalid=2682, Unknown=0, NotChecked=0, Total=3906 [2020-09-15 01:18:38,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-15 01:18:38,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 96. [2020-09-15 01:18:38,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-15 01:18:38,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 249 transitions. [2020-09-15 01:18:38,169 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 249 transitions. Word has length 28 [2020-09-15 01:18:38,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:38,169 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 249 transitions. [2020-09-15 01:18:38,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 01:18:38,170 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 249 transitions. [2020-09-15 01:18:38,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 01:18:38,170 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:38,170 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:38,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2020-09-15 01:18:38,371 INFO L427 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:38,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:38,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1583925840, now seen corresponding path program 236 times [2020-09-15 01:18:38,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:38,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430628757] [2020-09-15 01:18:38,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:38,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:39,040 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:39,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430628757] [2020-09-15 01:18:39,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829088854] [2020-09-15 01:18:39,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:39,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:18:39,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:39,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 01:18:39,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:39,177 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:18:39,222 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:39,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:39,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-15 01:18:39,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147866674] [2020-09-15 01:18:39,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-15 01:18:39,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:39,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-15 01:18:39,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:18:39,224 INFO L87 Difference]: Start difference. First operand 96 states and 249 transitions. Second operand 25 states. [2020-09-15 01:18:42,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:42,161 INFO L93 Difference]: Finished difference Result 106 states and 265 transitions. [2020-09-15 01:18:42,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-15 01:18:42,162 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-15 01:18:42,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:42,163 INFO L225 Difference]: With dead ends: 106 [2020-09-15 01:18:42,163 INFO L226 Difference]: Without dead ends: 98 [2020-09-15 01:18:42,163 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1123 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1337, Invalid=2953, Unknown=0, NotChecked=0, Total=4290 [2020-09-15 01:18:42,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-15 01:18:42,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 69. [2020-09-15 01:18:42,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-15 01:18:42,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 168 transitions. [2020-09-15 01:18:42,165 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 168 transitions. Word has length 28 [2020-09-15 01:18:42,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:42,165 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 168 transitions. [2020-09-15 01:18:42,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-15 01:18:42,165 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 168 transitions. [2020-09-15 01:18:42,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 01:18:42,165 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:42,165 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:42,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:42,366 INFO L427 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:42,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:42,367 INFO L82 PathProgramCache]: Analyzing trace with hash 234390510, now seen corresponding path program 237 times [2020-09-15 01:18:42,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:42,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487694032] [2020-09-15 01:18:42,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:42,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:42,821 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:42,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487694032] [2020-09-15 01:18:42,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866643011] [2020-09-15 01:18:42,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:42,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-15 01:18:42,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:42,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 01:18:42,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:42,935 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:18:42,975 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:42,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:42,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-15 01:18:42,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914440987] [2020-09-15 01:18:42,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-15 01:18:42,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:42,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-15 01:18:42,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:18:42,977 INFO L87 Difference]: Start difference. First operand 69 states and 168 transitions. Second operand 25 states. [2020-09-15 01:18:45,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:45,230 INFO L93 Difference]: Finished difference Result 124 states and 303 transitions. [2020-09-15 01:18:45,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-15 01:18:45,232 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-15 01:18:45,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:45,232 INFO L225 Difference]: With dead ends: 124 [2020-09-15 01:18:45,232 INFO L226 Difference]: Without dead ends: 119 [2020-09-15 01:18:45,233 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1213 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1390, Invalid=2900, Unknown=0, NotChecked=0, Total=4290 [2020-09-15 01:18:45,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-15 01:18:45,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 94. [2020-09-15 01:18:45,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-15 01:18:45,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 241 transitions. [2020-09-15 01:18:45,240 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 241 transitions. Word has length 28 [2020-09-15 01:18:45,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:45,240 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 241 transitions. [2020-09-15 01:18:45,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-15 01:18:45,240 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 241 transitions. [2020-09-15 01:18:45,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-15 01:18:45,241 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:45,241 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:45,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2020-09-15 01:18:45,442 INFO L427 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:45,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:45,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1857077091, now seen corresponding path program 238 times [2020-09-15 01:18:45,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:45,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123213313] [2020-09-15 01:18:45,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:45,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:45,702 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 90 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:45,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123213313] [2020-09-15 01:18:45,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782627681] [2020-09-15 01:18:45,703 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:45,765 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:18:45,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:45,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:18:45,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:45,789 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:45,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-09-15 01:18:45,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 14 [2020-09-15 01:18:45,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804980909] [2020-09-15 01:18:45,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:18:45,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:45,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:18:45,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-09-15 01:18:45,791 INFO L87 Difference]: Start difference. First operand 94 states and 241 transitions. Second operand 13 states. [2020-09-15 01:18:45,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:45,847 INFO L93 Difference]: Finished difference Result 421 states and 1013 transitions. [2020-09-15 01:18:45,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 01:18:45,848 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-09-15 01:18:45,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:45,849 INFO L225 Difference]: With dead ends: 421 [2020-09-15 01:18:45,849 INFO L226 Difference]: Without dead ends: 70 [2020-09-15 01:18:45,849 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-09-15 01:18:45,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-15 01:18:45,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-09-15 01:18:45,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-15 01:18:45,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 140 transitions. [2020-09-15 01:18:45,851 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 140 transitions. Word has length 29 [2020-09-15 01:18:45,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:45,851 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 140 transitions. [2020-09-15 01:18:45,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:18:45,851 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 140 transitions. [2020-09-15 01:18:45,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-15 01:18:45,851 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:45,851 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:46,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:46,057 INFO L427 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:46,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:46,058 INFO L82 PathProgramCache]: Analyzing trace with hash 65865102, now seen corresponding path program 239 times [2020-09-15 01:18:46,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:46,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458996951] [2020-09-15 01:18:46,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:46,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:46,698 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:46,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458996951] [2020-09-15 01:18:46,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738724687] [2020-09-15 01:18:46,704 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:46,772 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-09-15 01:18:46,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:46,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:18:46,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:47,363 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:47,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-09-15 01:18:47,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [23] total 36 [2020-09-15 01:18:47,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352663211] [2020-09-15 01:18:47,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:18:47,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:47,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:18:47,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1025, Unknown=0, NotChecked=0, Total=1260 [2020-09-15 01:18:47,365 INFO L87 Difference]: Start difference. First operand 70 states and 140 transitions. Second operand 13 states. [2020-09-15 01:18:47,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:47,425 INFO L93 Difference]: Finished difference Result 256 states and 475 transitions. [2020-09-15 01:18:47,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 01:18:47,427 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-09-15 01:18:47,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:47,427 INFO L225 Difference]: With dead ends: 256 [2020-09-15 01:18:47,427 INFO L226 Difference]: Without dead ends: 0 [2020-09-15 01:18:47,428 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=235, Invalid=1025, Unknown=0, NotChecked=0, Total=1260 [2020-09-15 01:18:47,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-15 01:18:47,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-15 01:18:47,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-15 01:18:47,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-15 01:18:47,429 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2020-09-15 01:18:47,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:47,429 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-15 01:18:47,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:18:47,430 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-15 01:18:47,430 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-15 01:18:47,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:47,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.09 01:18:47 BasicIcfg [2020-09-15 01:18:47,643 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-15 01:18:47,645 INFO L168 Benchmark]: Toolchain (without parser) took 388898.47 ms. Allocated memory was 140.0 MB in the beginning and 167.2 MB in the end (delta: 27.3 MB). Free memory was 102.5 MB in the beginning and 102.4 MB in the end (delta: 80.4 kB). Peak memory consumption was 27.3 MB. Max. memory is 7.1 GB. [2020-09-15 01:18:47,646 INFO L168 Benchmark]: CDTParser took 0.62 ms. Allocated memory is still 140.0 MB. Free memory was 121.6 MB in the beginning and 121.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-15 01:18:47,647 INFO L168 Benchmark]: CACSL2BoogieTranslator took 877.78 ms. Allocated memory was 140.0 MB in the beginning and 205.0 MB in the end (delta: 65.0 MB). Free memory was 101.9 MB in the beginning and 164.9 MB in the end (delta: -63.1 MB). Peak memory consumption was 25.2 MB. Max. memory is 7.1 GB. [2020-09-15 01:18:47,647 INFO L168 Benchmark]: Boogie Procedure Inliner took 63.28 ms. Allocated memory is still 205.0 MB. Free memory was 164.9 MB in the beginning and 162.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-09-15 01:18:47,649 INFO L168 Benchmark]: Boogie Preprocessor took 33.72 ms. Allocated memory is still 205.0 MB. Free memory was 162.9 MB in the beginning and 160.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-09-15 01:18:47,650 INFO L168 Benchmark]: RCFGBuilder took 485.33 ms. Allocated memory is still 205.0 MB. Free memory was 160.9 MB in the beginning and 141.1 MB in the end (delta: 19.8 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. [2020-09-15 01:18:47,650 INFO L168 Benchmark]: TraceAbstraction took 387426.73 ms. Allocated memory was 205.0 MB in the beginning and 167.2 MB in the end (delta: -37.7 MB). Free memory was 140.5 MB in the beginning and 102.4 MB in the end (delta: 38.0 MB). Peak memory consumption was 291.8 kB. Max. memory is 7.1 GB. [2020-09-15 01:18:47,653 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.62 ms. Allocated memory is still 140.0 MB. Free memory was 121.6 MB in the beginning and 121.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 877.78 ms. Allocated memory was 140.0 MB in the beginning and 205.0 MB in the end (delta: 65.0 MB). Free memory was 101.9 MB in the beginning and 164.9 MB in the end (delta: -63.1 MB). Peak memory consumption was 25.2 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 63.28 ms. Allocated memory is still 205.0 MB. Free memory was 164.9 MB in the beginning and 162.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 33.72 ms. Allocated memory is still 205.0 MB. Free memory was 162.9 MB in the beginning and 160.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 485.33 ms. Allocated memory is still 205.0 MB. Free memory was 160.9 MB in the beginning and 141.1 MB in the end (delta: 19.8 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 387426.73 ms. Allocated memory was 205.0 MB in the beginning and 167.2 MB in the end (delta: -37.7 MB). Free memory was 140.5 MB in the beginning and 102.4 MB in the end (delta: 38.0 MB). Peak memory consumption was 291.8 kB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.6s, 57 ProgramPointsBefore, 20 ProgramPointsAfterwards, 55 TransitionsBefore, 15 TransitionsAfterwards, 924 CoEnabledTransitionPairs, 6 FixpointIterations, 12 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 3 ChoiceCompositions, 486 VarBasedMoverChecksPositive, 13 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 851 CheckedPairsTotal, 42 TotalNumberOfCompositions - PositiveResult [Line: 703]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 387.2s, OverallIterations: 241, TraceHistogramMax: 11, AutomataDifference: 232.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.6s, HoareTripleCheckerStatistics: 3926 SDtfs, 13726 SDslu, 25985 SDs, 0 SdLazy, 27854 SolverSat, 15956 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 41.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13656 GetRequests, 4495 SyntacticMatches, 234 SemanticMatches, 8927 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91499 ImplicationChecksByTransitivity, 241.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=96occurred in iteration=237, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 241 MinimizatonAttempts, 6068 StatesRemovedByMinimization, 238 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2.3s SsaConstructionTime, 7.8s SatisfiabilityAnalysisTime, 83.7s InterpolantComputationTime, 10246 NumberOfCodeBlocks, 10244 NumberOfCodeBlocksAsserted, 1270 NumberOfCheckSat, 9769 ConstructedInterpolants, 0 QuantifiedInterpolants, 956995 SizeOfPredicates, 3171 NumberOfNonLiveVariables, 31166 ConjunctsInSsa, 4136 ConjunctsInUnsatCore, 477 InterpolantComputations, 7 PerfectInterpolantSequences, 290/21430 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...