/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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-longest-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7a177ad [2020-11-09 13:29:56,890 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-09 13:29:56,894 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-09 13:29:56,952 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-09 13:29:56,953 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-09 13:29:56,957 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-09 13:29:56,961 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-09 13:29:56,969 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-09 13:29:56,972 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-09 13:29:56,978 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-09 13:29:56,979 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-09 13:29:56,981 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-09 13:29:56,981 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-09 13:29:56,985 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-09 13:29:56,987 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-09 13:29:56,988 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-09 13:29:56,989 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-09 13:29:56,990 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-09 13:29:57,008 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-09 13:29:57,014 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-09 13:29:57,018 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-09 13:29:57,020 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-09 13:29:57,021 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-09 13:29:57,022 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-09 13:29:57,028 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-09 13:29:57,028 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-09 13:29:57,028 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-09 13:29:57,034 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-09 13:29:57,034 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-09 13:29:57,035 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-09 13:29:57,036 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-09 13:29:57,036 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-09 13:29:57,038 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-09 13:29:57,039 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-09 13:29:57,040 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-09 13:29:57,041 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-09 13:29:57,041 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-09 13:29:57,042 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-09 13:29:57,042 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-09 13:29:57,043 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-09 13:29:57,044 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-09 13:29:57,045 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf [2020-11-09 13:29:57,095 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-09 13:29:57,096 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-09 13:29:57,100 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-09 13:29:57,100 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-09 13:29:57,101 INFO L138 SettingsManager]: * Use SBE=true [2020-11-09 13:29:57,101 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-09 13:29:57,101 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-09 13:29:57,101 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-09 13:29:57,102 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-09 13:29:57,102 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-09 13:29:57,103 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-09 13:29:57,103 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-09 13:29:57,103 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-09 13:29:57,104 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-09 13:29:57,104 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-09 13:29:57,104 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-09 13:29:57,104 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-09 13:29:57,104 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-09 13:29:57,105 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-09 13:29:57,105 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-09 13:29:57,105 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-09 13:29:57,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-09 13:29:57,106 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-09 13:29:57,106 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-11-09 13:29:57,106 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-09 13:29:57,106 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-09 13:29:57,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-09 13:29:57,106 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-11-09 13:29:57,107 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-09 13:29:57,499 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-09 13:29:57,530 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-09 13:29:57,534 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-09 13:29:57,536 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-09 13:29:57,537 INFO L275 PluginConnector]: CDTParser initialized [2020-11-09 13:29:57,538 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longest-2.i [2020-11-09 13:29:57,627 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1eb8e6e5/bef279645d9d4595bc33e3ed5bd891b1/FLAG1df07f173 [2020-11-09 13:29:58,476 INFO L306 CDTParser]: Found 1 translation units. [2020-11-09 13:29:58,477 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-2.i [2020-11-09 13:29:58,492 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1eb8e6e5/bef279645d9d4595bc33e3ed5bd891b1/FLAG1df07f173 [2020-11-09 13:29:58,728 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1eb8e6e5/bef279645d9d4595bc33e3ed5bd891b1 [2020-11-09 13:29:58,733 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-09 13:29:58,742 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-09 13:29:58,747 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-09 13:29:58,747 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-09 13:29:58,751 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-09 13:29:58,752 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 01:29:58" (1/1) ... [2020-11-09 13:29:58,757 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ea53ea4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:29:58, skipping insertion in model container [2020-11-09 13:29:58,757 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 01:29:58" (1/1) ... [2020-11-09 13:29:58,766 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-09 13:29:58,829 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-09 13:29:59,232 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-09 13:29:59,245 INFO L203 MainTranslator]: Completed pre-run [2020-11-09 13:29:59,346 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-09 13:29:59,502 INFO L208 MainTranslator]: Completed translation [2020-11-09 13:29:59,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:29:59 WrapperNode [2020-11-09 13:29:59,505 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-09 13:29:59,506 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-09 13:29:59,507 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-09 13:29:59,507 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-09 13:29:59,517 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:29:59" (1/1) ... [2020-11-09 13:29:59,555 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:29:59" (1/1) ... [2020-11-09 13:29:59,587 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-09 13:29:59,590 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-09 13:29:59,590 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-09 13:29:59,590 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-09 13:29:59,600 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:29:59" (1/1) ... [2020-11-09 13:29:59,600 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:29:59" (1/1) ... [2020-11-09 13:29:59,616 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:29:59" (1/1) ... [2020-11-09 13:29:59,616 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:29:59" (1/1) ... [2020-11-09 13:29:59,634 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:29:59" (1/1) ... [2020-11-09 13:29:59,643 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:29:59" (1/1) ... [2020-11-09 13:29:59,645 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:29:59" (1/1) ... [2020-11-09 13:29:59,650 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-09 13:29:59,657 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-09 13:29:59,657 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-09 13:29:59,657 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-09 13:29:59,661 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:29:59" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:29:59,748 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-11-09 13:29:59,748 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-11-09 13:29:59,748 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-11-09 13:29:59,748 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-11-09 13:29:59,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-09 13:29:59,749 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-11-09 13:29:59,750 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-09 13:29:59,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-09 13:29:59,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-09 13:29:59,751 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-11-09 13:29:59,752 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-09 13:29:59,752 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-09 13:29:59,754 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-11-09 13:30:00,232 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-09 13:30:00,232 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-11-09 13:30:00,234 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 01:30:00 BoogieIcfgContainer [2020-11-09 13:30:00,234 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-09 13:30:00,237 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-09 13:30:00,237 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-09 13:30:00,240 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-09 13:30:00,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 01:29:58" (1/3) ... [2020-11-09 13:30:00,241 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1457af32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 01:30:00, skipping insertion in model container [2020-11-09 13:30:00,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:29:59" (2/3) ... [2020-11-09 13:30:00,242 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1457af32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 01:30:00, skipping insertion in model container [2020-11-09 13:30:00,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 01:30:00" (3/3) ... [2020-11-09 13:30:00,244 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longest-2.i [2020-11-09 13:30:00,260 WARN L168 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-11-09 13:30:00,260 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-09 13:30:00,264 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-09 13:30:00,265 INFO L351 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-11-09 13:30:00,302 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:30:00,302 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:30:00,302 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:30:00,302 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:30:00,303 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:30:00,303 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:30:00,303 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:30:00,303 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:30:00,304 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:30:00,304 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:30:00,304 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:30:00,304 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:30:00,305 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:30:00,305 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:30:00,305 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:30:00,305 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:30:00,306 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:30:00,306 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:30:00,306 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:30:00,306 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:30:00,306 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:30:00,307 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:30:00,307 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:30:00,307 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:30:00,307 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:30:00,307 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:30:00,308 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:30:00,308 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:30:00,308 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:30:00,309 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:30:00,309 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:30:00,309 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:30:00,309 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:30:00,309 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:30:00,310 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:30:00,310 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:30:00,310 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:30:00,310 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:30:00,310 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:30:00,311 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:30:00,311 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:30:00,311 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:30:00,311 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:30:00,312 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:30:00,312 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:30:00,312 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:30:00,312 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:30:00,313 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:30:00,313 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:30:00,313 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:30:00,313 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:30:00,313 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:30:00,314 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:30:00,314 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:30:00,314 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:30:00,314 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:30:00,316 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:30:00,317 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:30:00,317 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:30:00,317 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:30:00,317 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:30:00,318 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:30:00,324 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:30:00,324 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:30:00,325 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:30:00,325 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:30:00,325 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:30:00,325 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:30:00,328 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-11-09 13:30:00,341 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-11-09 13:30:00,364 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-09 13:30:00,364 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-09 13:30:00,365 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-11-09 13:30:00,365 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-09 13:30:00,365 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-09 13:30:00,365 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-09 13:30:00,365 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-09 13:30:00,365 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-09 13:30:00,376 INFO L128 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2020-11-09 13:30:00,377 INFO L135 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 65 places, 64 transitions, 138 flow [2020-11-09 13:30:00,380 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 65 places, 64 transitions, 138 flow [2020-11-09 13:30:00,382 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 65 places, 64 transitions, 138 flow [2020-11-09 13:30:00,424 INFO L129 PetriNetUnfolder]: 6/62 cut-off events. [2020-11-09 13:30:00,424 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-11-09 13:30:00,430 INFO L84 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 62 events. 6/62 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 97 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2020-11-09 13:30:00,433 INFO L116 LiptonReduction]: Number of co-enabled transitions 1144 [2020-11-09 13:30:02,972 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-11-09 13:30:03,168 WARN L194 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-11-09 13:30:03,960 WARN L194 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-11-09 13:30:04,071 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-11-09 13:30:04,303 WARN L194 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-11-09 13:30:04,419 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-11-09 13:30:04,855 WARN L194 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2020-11-09 13:30:05,001 WARN L194 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-11-09 13:30:05,319 WARN L194 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2020-11-09 13:30:05,472 WARN L194 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-11-09 13:30:05,513 INFO L131 LiptonReduction]: Checked pairs total: 1187 [2020-11-09 13:30:05,513 INFO L133 LiptonReduction]: Total number of compositions: 62 [2020-11-09 13:30:05,520 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-11-09 13:30:05,529 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-11-09 13:30:05,531 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-11-09 13:30:05,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-09 13:30:05,536 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:05,537 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-09 13:30:05,537 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:05,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:05,543 INFO L82 PathProgramCache]: Analyzing trace with hash -805875314, now seen corresponding path program 1 times [2020-11-09 13:30:05,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:05,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574628882] [2020-11-09 13:30:05,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:05,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:05,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:05,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574628882] [2020-11-09 13:30:05,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-09 13:30:05,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-09 13:30:05,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588575509] [2020-11-09 13:30:05,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-09 13:30:05,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:05,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-09 13:30:05,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-09 13:30:05,824 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-11-09 13:30:05,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:05,924 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-11-09 13:30:05,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-09 13:30:05,927 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-11-09 13:30:05,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:05,960 INFO L225 Difference]: With dead ends: 75 [2020-11-09 13:30:05,960 INFO L226 Difference]: Without dead ends: 42 [2020-11-09 13:30:05,963 INFO L677 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 [2020-11-09 13:30:05,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-09 13:30:06,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-11-09 13:30:06,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-09 13:30:06,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-11-09 13:30:06,015 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-11-09 13:30:06,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:06,016 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-11-09 13:30:06,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-09 13:30:06,016 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-11-09 13:30:06,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-09 13:30:06,017 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:06,017 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:06,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-09 13:30:06,018 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:06,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:06,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1351909113, now seen corresponding path program 1 times [2020-11-09 13:30:06,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:06,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933877158] [2020-11-09 13:30:06,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:06,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:06,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:06,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933877158] [2020-11-09 13:30:06,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-09 13:30:06,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-09 13:30:06,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395245600] [2020-11-09 13:30:06,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-09 13:30:06,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:06,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-09 13:30:06,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-09 13:30:06,143 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-11-09 13:30:06,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:06,203 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-11-09 13:30:06,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-09 13:30:06,204 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-11-09 13:30:06,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:06,206 INFO L225 Difference]: With dead ends: 56 [2020-11-09 13:30:06,206 INFO L226 Difference]: Without dead ends: 50 [2020-11-09 13:30:06,207 INFO L677 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 [2020-11-09 13:30:06,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-09 13:30:06,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-11-09 13:30:06,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-09 13:30:06,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-11-09 13:30:06,216 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-11-09 13:30:06,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:06,217 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-11-09 13:30:06,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-09 13:30:06,217 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-11-09 13:30:06,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-09 13:30:06,218 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:06,218 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:06,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-09 13:30:06,219 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:06,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:06,220 INFO L82 PathProgramCache]: Analyzing trace with hash 2021583950, now seen corresponding path program 1 times [2020-11-09 13:30:06,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:06,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653150647] [2020-11-09 13:30:06,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:06,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:06,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:06,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653150647] [2020-11-09 13:30:06,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-09 13:30:06,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-09 13:30:06,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324837783] [2020-11-09 13:30:06,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-09 13:30:06,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:06,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-09 13:30:06,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-09 13:30:06,327 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-11-09 13:30:06,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:06,416 INFO L93 Difference]: Finished difference Result 54 states and 124 transitions. [2020-11-09 13:30:06,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-09 13:30:06,417 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-09 13:30:06,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:06,418 INFO L225 Difference]: With dead ends: 54 [2020-11-09 13:30:06,418 INFO L226 Difference]: Without dead ends: 47 [2020-11-09 13:30:06,419 INFO L677 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 [2020-11-09 13:30:06,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-09 13:30:06,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2020-11-09 13:30:06,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-09 13:30:06,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 106 transitions. [2020-11-09 13:30:06,428 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 106 transitions. Word has length 10 [2020-11-09 13:30:06,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:06,429 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 106 transitions. [2020-11-09 13:30:06,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-09 13:30:06,429 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 106 transitions. [2020-11-09 13:30:06,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-09 13:30:06,430 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:06,430 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:06,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-09 13:30:06,431 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:06,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:06,432 INFO L82 PathProgramCache]: Analyzing trace with hash 2101929440, now seen corresponding path program 2 times [2020-11-09 13:30:06,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:06,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265784164] [2020-11-09 13:30:06,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:06,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:06,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:06,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265784164] [2020-11-09 13:30:06,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-09 13:30:06,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-09 13:30:06,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165354229] [2020-11-09 13:30:06,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-09 13:30:06,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:06,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-09 13:30:06,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-09 13:30:06,555 INFO L87 Difference]: Start difference. First operand 45 states and 106 transitions. Second operand 6 states. [2020-11-09 13:30:06,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:06,634 INFO L93 Difference]: Finished difference Result 59 states and 138 transitions. [2020-11-09 13:30:06,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-09 13:30:06,635 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-09 13:30:06,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:06,636 INFO L225 Difference]: With dead ends: 59 [2020-11-09 13:30:06,636 INFO L226 Difference]: Without dead ends: 53 [2020-11-09 13:30:06,637 INFO L677 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 [2020-11-09 13:30:06,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-11-09 13:30:06,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 41. [2020-11-09 13:30:06,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-09 13:30:06,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 96 transitions. [2020-11-09 13:30:06,644 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 96 transitions. Word has length 10 [2020-11-09 13:30:06,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:06,644 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 96 transitions. [2020-11-09 13:30:06,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-09 13:30:06,644 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 96 transitions. [2020-11-09 13:30:06,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-09 13:30:06,645 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:06,645 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:06,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-09 13:30:06,646 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:06,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:06,646 INFO L82 PathProgramCache]: Analyzing trace with hash 2082353870, now seen corresponding path program 3 times [2020-11-09 13:30:06,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:06,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342047378] [2020-11-09 13:30:06,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:06,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:06,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:06,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342047378] [2020-11-09 13:30:06,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-09 13:30:06,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-09 13:30:06,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662008589] [2020-11-09 13:30:06,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-09 13:30:06,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:06,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-09 13:30:06,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-09 13:30:06,712 INFO L87 Difference]: Start difference. First operand 41 states and 96 transitions. Second operand 6 states. [2020-11-09 13:30:06,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:06,781 INFO L93 Difference]: Finished difference Result 65 states and 152 transitions. [2020-11-09 13:30:06,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-09 13:30:06,782 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-09 13:30:06,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:06,783 INFO L225 Difference]: With dead ends: 65 [2020-11-09 13:30:06,783 INFO L226 Difference]: Without dead ends: 52 [2020-11-09 13:30:06,784 INFO L677 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 [2020-11-09 13:30:06,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-11-09 13:30:06,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 41. [2020-11-09 13:30:06,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-09 13:30:06,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 99 transitions. [2020-11-09 13:30:06,790 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 99 transitions. Word has length 10 [2020-11-09 13:30:06,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:06,791 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 99 transitions. [2020-11-09 13:30:06,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-09 13:30:06,791 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 99 transitions. [2020-11-09 13:30:06,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-09 13:30:06,792 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:06,792 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:06,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-09 13:30:06,792 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:06,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:06,793 INFO L82 PathProgramCache]: Analyzing trace with hash 735328415, now seen corresponding path program 4 times [2020-11-09 13:30:06,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:06,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228099434] [2020-11-09 13:30:06,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:06,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:06,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:06,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228099434] [2020-11-09 13:30:06,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976272013] [2020-11-09 13:30:06,893 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:30:06,976 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 13:30:06,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:06,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-09 13:30:06,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:07,032 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:30:07,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:07,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:07,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-11-09 13:30:07,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982779149] [2020-11-09 13:30:07,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-09 13:30:07,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:07,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-09 13:30:07,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-09 13:30:07,049 INFO L87 Difference]: Start difference. First operand 41 states and 99 transitions. Second operand 8 states. [2020-11-09 13:30:07,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:07,425 INFO L93 Difference]: Finished difference Result 63 states and 147 transitions. [2020-11-09 13:30:07,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-09 13:30:07,425 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-11-09 13:30:07,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:07,426 INFO L225 Difference]: With dead ends: 63 [2020-11-09 13:30:07,427 INFO L226 Difference]: Without dead ends: 54 [2020-11-09 13:30:07,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-11-09 13:30:07,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-11-09 13:30:07,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2020-11-09 13:30:07,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-11-09 13:30:07,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 87 transitions. [2020-11-09 13:30:07,444 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 87 transitions. Word has length 11 [2020-11-09 13:30:07,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:07,444 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 87 transitions. [2020-11-09 13:30:07,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-09 13:30:07,444 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 87 transitions. [2020-11-09 13:30:07,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-09 13:30:07,445 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:07,445 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:07,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-09 13:30:07,647 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:07,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:07,648 INFO L82 PathProgramCache]: Analyzing trace with hash 128488628, now seen corresponding path program 5 times [2020-11-09 13:30:07,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:07,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623234550] [2020-11-09 13:30:07,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:07,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:07,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:07,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623234550] [2020-11-09 13:30:07,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442782920] [2020-11-09 13:30:07,746 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:30:07,816 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 13:30:07,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:07,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-09 13:30:07,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:07,845 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:07,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:07,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:07,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-11-09 13:30:07,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860464477] [2020-11-09 13:30:07,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-09 13:30:07,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:07,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-09 13:30:07,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-11-09 13:30:07,860 INFO L87 Difference]: Start difference. First operand 37 states and 87 transitions. Second operand 8 states. [2020-11-09 13:30:07,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:07,965 INFO L93 Difference]: Finished difference Result 56 states and 133 transitions. [2020-11-09 13:30:07,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-09 13:30:07,965 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-11-09 13:30:07,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:07,967 INFO L225 Difference]: With dead ends: 56 [2020-11-09 13:30:07,967 INFO L226 Difference]: Without dead ends: 51 [2020-11-09 13:30:07,967 INFO L677 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 [2020-11-09 13:30:07,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-09 13:30:07,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2020-11-09 13:30:07,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-09 13:30:07,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-11-09 13:30:07,972 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-11-09 13:30:07,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:07,973 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-11-09 13:30:07,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-09 13:30:07,973 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-11-09 13:30:07,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-09 13:30:07,974 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:07,974 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:08,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:08,186 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:08,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:08,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1416964401, now seen corresponding path program 6 times [2020-11-09 13:30:08,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:08,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992023900] [2020-11-09 13:30:08,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:08,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:08,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:08,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992023900] [2020-11-09 13:30:08,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669079140] [2020-11-09 13:30:08,283 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:30:08,340 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-11-09 13:30:08,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:08,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-09 13:30:08,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:08,346 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:08,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:08,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:08,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-11-09 13:30:08,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899873691] [2020-11-09 13:30:08,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-09 13:30:08,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:08,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-09 13:30:08,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-09 13:30:08,363 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-11-09 13:30:08,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:08,472 INFO L93 Difference]: Finished difference Result 56 states and 131 transitions. [2020-11-09 13:30:08,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-09 13:30:08,472 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-11-09 13:30:08,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:08,473 INFO L225 Difference]: With dead ends: 56 [2020-11-09 13:30:08,473 INFO L226 Difference]: Without dead ends: 50 [2020-11-09 13:30:08,474 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2020-11-09 13:30:08,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-09 13:30:08,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2020-11-09 13:30:08,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-11-09 13:30:08,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-11-09 13:30:08,479 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 12 [2020-11-09 13:30:08,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:08,479 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-11-09 13:30:08,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-09 13:30:08,479 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-11-09 13:30:08,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-09 13:30:08,480 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:08,480 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:08,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:08,688 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:08,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:08,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1320372483, now seen corresponding path program 7 times [2020-11-09 13:30:08,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:08,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661054962] [2020-11-09 13:30:08,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:08,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:08,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:08,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661054962] [2020-11-09 13:30:08,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389822524] [2020-11-09 13:30:08,764 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:30:08,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:08,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-09 13:30:08,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:08,855 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:08,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:08,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:08,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-11-09 13:30:08,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714189256] [2020-11-09 13:30:08,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-09 13:30:08,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:08,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-09 13:30:08,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-11-09 13:30:08,872 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 9 states. [2020-11-09 13:30:09,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:09,083 INFO L93 Difference]: Finished difference Result 63 states and 149 transitions. [2020-11-09 13:30:09,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-09 13:30:09,085 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-11-09 13:30:09,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:09,086 INFO L225 Difference]: With dead ends: 63 [2020-11-09 13:30:09,086 INFO L226 Difference]: Without dead ends: 58 [2020-11-09 13:30:09,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-11-09 13:30:09,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-09 13:30:09,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 41. [2020-11-09 13:30:09,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-09 13:30:09,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 97 transitions. [2020-11-09 13:30:09,096 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 97 transitions. Word has length 12 [2020-11-09 13:30:09,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:09,097 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 97 transitions. [2020-11-09 13:30:09,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-09 13:30:09,099 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 97 transitions. [2020-11-09 13:30:09,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-09 13:30:09,099 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:09,099 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:09,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:09,311 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:09,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:09,311 INFO L82 PathProgramCache]: Analyzing trace with hash -311794613, now seen corresponding path program 8 times [2020-11-09 13:30:09,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:09,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720231420] [2020-11-09 13:30:09,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:09,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:09,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:09,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720231420] [2020-11-09 13:30:09,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254015659] [2020-11-09 13:30:09,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:30:09,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 13:30:09,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:09,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-09 13:30:09,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:09,488 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:30:09,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:09,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:09,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-11-09 13:30:09,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541434071] [2020-11-09 13:30:09,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-09 13:30:09,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:09,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-09 13:30:09,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-11-09 13:30:09,501 INFO L87 Difference]: Start difference. First operand 41 states and 97 transitions. Second operand 9 states. [2020-11-09 13:30:09,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:09,713 INFO L93 Difference]: Finished difference Result 71 states and 167 transitions. [2020-11-09 13:30:09,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-09 13:30:09,713 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-11-09 13:30:09,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:09,714 INFO L225 Difference]: With dead ends: 71 [2020-11-09 13:30:09,714 INFO L226 Difference]: Without dead ends: 62 [2020-11-09 13:30:09,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2020-11-09 13:30:09,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-11-09 13:30:09,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 47. [2020-11-09 13:30:09,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-09 13:30:09,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-11-09 13:30:09,720 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 12 [2020-11-09 13:30:09,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:09,720 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-11-09 13:30:09,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-09 13:30:09,720 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-11-09 13:30:09,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-09 13:30:09,721 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:09,721 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:09,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-11-09 13:30:09,922 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:09,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:09,923 INFO L82 PathProgramCache]: Analyzing trace with hash -2018100772, now seen corresponding path program 9 times [2020-11-09 13:30:09,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:09,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476979989] [2020-11-09 13:30:09,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:09,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:10,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:10,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476979989] [2020-11-09 13:30:10,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713222293] [2020-11-09 13:30:10,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:30:10,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-09 13:30:10,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:10,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-09 13:30:10,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:10,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:10,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:10,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-11-09 13:30:10,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240412884] [2020-11-09 13:30:10,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-09 13:30:10,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:10,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-09 13:30:10,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-11-09 13:30:10,123 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-11-09 13:30:10,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:10,444 INFO L93 Difference]: Finished difference Result 72 states and 169 transitions. [2020-11-09 13:30:10,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-09 13:30:10,445 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-11-09 13:30:10,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:10,446 INFO L225 Difference]: With dead ends: 72 [2020-11-09 13:30:10,446 INFO L226 Difference]: Without dead ends: 63 [2020-11-09 13:30:10,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-11-09 13:30:10,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-11-09 13:30:10,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 41. [2020-11-09 13:30:10,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-09 13:30:10,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 97 transitions. [2020-11-09 13:30:10,451 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 97 transitions. Word has length 13 [2020-11-09 13:30:10,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:10,451 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 97 transitions. [2020-11-09 13:30:10,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-09 13:30:10,451 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 97 transitions. [2020-11-09 13:30:10,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-09 13:30:10,452 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:10,452 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:10,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:10,662 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:10,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:10,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1075670313, now seen corresponding path program 10 times [2020-11-09 13:30:10,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:10,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606135601] [2020-11-09 13:30:10,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:10,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:10,741 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:10,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606135601] [2020-11-09 13:30:10,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643925914] [2020-11-09 13:30:10,741 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:30:10,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 13:30:10,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:10,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-09 13:30:10,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:10,822 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:10,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:10,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:10,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-11-09 13:30:10,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879583508] [2020-11-09 13:30:10,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-09 13:30:10,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:10,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-09 13:30:10,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-11-09 13:30:10,835 INFO L87 Difference]: Start difference. First operand 41 states and 97 transitions. Second operand 10 states. [2020-11-09 13:30:11,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:11,052 INFO L93 Difference]: Finished difference Result 64 states and 153 transitions. [2020-11-09 13:30:11,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-09 13:30:11,053 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-11-09 13:30:11,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:11,054 INFO L225 Difference]: With dead ends: 64 [2020-11-09 13:30:11,054 INFO L226 Difference]: Without dead ends: 59 [2020-11-09 13:30:11,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2020-11-09 13:30:11,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-09 13:30:11,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 49. [2020-11-09 13:30:11,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-09 13:30:11,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-11-09 13:30:11,061 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-11-09 13:30:11,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:11,061 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-11-09 13:30:11,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-09 13:30:11,062 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-11-09 13:30:11,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-09 13:30:11,063 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:11,063 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:11,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:11,274 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:11,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:11,275 INFO L82 PathProgramCache]: Analyzing trace with hash 198162772, now seen corresponding path program 11 times [2020-11-09 13:30:11,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:11,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242808933] [2020-11-09 13:30:11,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:11,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:11,390 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:11,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242808933] [2020-11-09 13:30:11,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543861739] [2020-11-09 13:30:11,391 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:30:11,455 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-09 13:30:11,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:11,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-09 13:30:11,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:11,465 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:11,480 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:11,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:11,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-11-09 13:30:11,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721607035] [2020-11-09 13:30:11,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-09 13:30:11,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:11,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-09 13:30:11,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-11-09 13:30:11,483 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-11-09 13:30:11,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:11,636 INFO L93 Difference]: Finished difference Result 64 states and 151 transitions. [2020-11-09 13:30:11,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-09 13:30:11,636 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-11-09 13:30:11,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:11,638 INFO L225 Difference]: With dead ends: 64 [2020-11-09 13:30:11,638 INFO L226 Difference]: Without dead ends: 58 [2020-11-09 13:30:11,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-11-09 13:30:11,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-09 13:30:11,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2020-11-09 13:30:11,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-11-09 13:30:11,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-11-09 13:30:11,651 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 14 [2020-11-09 13:30:11,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:11,652 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-11-09 13:30:11,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-09 13:30:11,652 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-11-09 13:30:11,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-09 13:30:11,653 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:11,653 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:11,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-11-09 13:30:11,854 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:11,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:11,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1863413606, now seen corresponding path program 12 times [2020-11-09 13:30:11,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:11,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495253285] [2020-11-09 13:30:11,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:11,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:11,948 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:11,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495253285] [2020-11-09 13:30:11,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970548341] [2020-11-09 13:30:11,949 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:30:12,028 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-09 13:30:12,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:12,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-09 13:30:12,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:12,067 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:12,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:12,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:12,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-09 13:30:12,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743270694] [2020-11-09 13:30:12,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-09 13:30:12,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:12,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-09 13:30:12,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-11-09 13:30:12,082 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 11 states. [2020-11-09 13:30:12,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:12,417 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-11-09 13:30:12,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-09 13:30:12,418 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-11-09 13:30:12,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:12,418 INFO L225 Difference]: With dead ends: 73 [2020-11-09 13:30:12,419 INFO L226 Difference]: Without dead ends: 68 [2020-11-09 13:30:12,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2020-11-09 13:30:12,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-11-09 13:30:12,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 45. [2020-11-09 13:30:12,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-09 13:30:12,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 107 transitions. [2020-11-09 13:30:12,424 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 107 transitions. Word has length 14 [2020-11-09 13:30:12,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:12,424 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 107 transitions. [2020-11-09 13:30:12,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-09 13:30:12,424 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 107 transitions. [2020-11-09 13:30:12,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-09 13:30:12,425 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:12,425 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:12,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:12,635 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:12,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:12,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1013983880, now seen corresponding path program 13 times [2020-11-09 13:30:12,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:12,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123591245] [2020-11-09 13:30:12,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:12,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:12,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:12,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123591245] [2020-11-09 13:30:12,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306531891] [2020-11-09 13:30:12,716 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:30:12,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:12,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-09 13:30:12,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:12,806 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:30:12,817 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:12,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:12,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-09 13:30:12,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000567761] [2020-11-09 13:30:12,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-09 13:30:12,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:12,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-09 13:30:12,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-11-09 13:30:12,819 INFO L87 Difference]: Start difference. First operand 45 states and 107 transitions. Second operand 11 states. [2020-11-09 13:30:13,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:13,142 INFO L93 Difference]: Finished difference Result 81 states and 191 transitions. [2020-11-09 13:30:13,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-09 13:30:13,149 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-11-09 13:30:13,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:13,150 INFO L225 Difference]: With dead ends: 81 [2020-11-09 13:30:13,150 INFO L226 Difference]: Without dead ends: 72 [2020-11-09 13:30:13,151 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=182, Invalid=370, Unknown=0, NotChecked=0, Total=552 [2020-11-09 13:30:13,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-11-09 13:30:13,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 53. [2020-11-09 13:30:13,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-09 13:30:13,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-11-09 13:30:13,155 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 14 [2020-11-09 13:30:13,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:13,155 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-11-09 13:30:13,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-09 13:30:13,155 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-11-09 13:30:13,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-09 13:30:13,156 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:13,156 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:13,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-09 13:30:13,357 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:13,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:13,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1931272153, now seen corresponding path program 14 times [2020-11-09 13:30:13,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:13,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354424275] [2020-11-09 13:30:13,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:13,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:13,441 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:13,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354424275] [2020-11-09 13:30:13,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804314133] [2020-11-09 13:30:13,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:30:13,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 13:30:13,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:13,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-09 13:30:13,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:13,576 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:13,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:13,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-09 13:30:13,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361538684] [2020-11-09 13:30:13,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-09 13:30:13,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:13,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-09 13:30:13,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-11-09 13:30:13,579 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-11-09 13:30:13,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:13,978 INFO L93 Difference]: Finished difference Result 82 states and 193 transitions. [2020-11-09 13:30:13,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-09 13:30:13,979 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-11-09 13:30:13,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:13,980 INFO L225 Difference]: With dead ends: 82 [2020-11-09 13:30:13,980 INFO L226 Difference]: Without dead ends: 73 [2020-11-09 13:30:13,981 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-11-09 13:30:13,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-11-09 13:30:13,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 45. [2020-11-09 13:30:13,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-09 13:30:13,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 107 transitions. [2020-11-09 13:30:13,985 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 107 transitions. Word has length 15 [2020-11-09 13:30:13,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:13,986 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 107 transitions. [2020-11-09 13:30:13,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-09 13:30:13,986 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 107 transitions. [2020-11-09 13:30:13,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-09 13:30:13,986 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:13,987 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:14,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-09 13:30:14,197 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:14,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:14,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1368757306, now seen corresponding path program 15 times [2020-11-09 13:30:14,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:14,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555638579] [2020-11-09 13:30:14,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:14,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:14,292 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:14,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555638579] [2020-11-09 13:30:14,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868337267] [2020-11-09 13:30:14,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:30:14,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-09 13:30:14,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:14,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-09 13:30:14,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:14,381 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:14,401 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:14,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:14,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-09 13:30:14,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293201883] [2020-11-09 13:30:14,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-09 13:30:14,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:14,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-09 13:30:14,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-11-09 13:30:14,403 INFO L87 Difference]: Start difference. First operand 45 states and 107 transitions. Second operand 12 states. [2020-11-09 13:30:14,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:14,729 INFO L93 Difference]: Finished difference Result 72 states and 173 transitions. [2020-11-09 13:30:14,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-09 13:30:14,730 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-11-09 13:30:14,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:14,731 INFO L225 Difference]: With dead ends: 72 [2020-11-09 13:30:14,731 INFO L226 Difference]: Without dead ends: 67 [2020-11-09 13:30:14,731 INFO L677 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 [2020-11-09 13:30:14,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-11-09 13:30:14,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 55. [2020-11-09 13:30:14,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-11-09 13:30:14,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-11-09 13:30:14,738 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-11-09 13:30:14,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:14,740 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-11-09 13:30:14,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-09 13:30:14,740 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-11-09 13:30:14,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-09 13:30:14,740 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:14,740 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:14,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-09 13:30:14,942 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:14,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:14,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1455869111, now seen corresponding path program 16 times [2020-11-09 13:30:14,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:14,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346597407] [2020-11-09 13:30:14,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:14,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:15,094 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:15,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346597407] [2020-11-09 13:30:15,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611781507] [2020-11-09 13:30:15,094 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:30:15,157 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 13:30:15,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:15,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-09 13:30:15,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:15,162 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:15,180 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:15,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:15,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-11-09 13:30:15,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682021753] [2020-11-09 13:30:15,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-09 13:30:15,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:15,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-09 13:30:15,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-11-09 13:30:15,182 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-11-09 13:30:15,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:15,367 INFO L93 Difference]: Finished difference Result 72 states and 171 transitions. [2020-11-09 13:30:15,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-09 13:30:15,367 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-11-09 13:30:15,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:15,368 INFO L225 Difference]: With dead ends: 72 [2020-11-09 13:30:15,368 INFO L226 Difference]: Without dead ends: 66 [2020-11-09 13:30:15,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2020-11-09 13:30:15,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-11-09 13:30:15,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2020-11-09 13:30:15,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-11-09 13:30:15,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-11-09 13:30:15,373 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 16 [2020-11-09 13:30:15,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:15,373 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-11-09 13:30:15,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-09 13:30:15,373 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-11-09 13:30:15,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-09 13:30:15,374 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:15,374 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:15,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-09 13:30:15,586 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:15,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:15,587 INFO L82 PathProgramCache]: Analyzing trace with hash -260077303, now seen corresponding path program 17 times [2020-11-09 13:30:15,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:15,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276053015] [2020-11-09 13:30:15,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:15,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:15,677 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:15,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276053015] [2020-11-09 13:30:15,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741725410] [2020-11-09 13:30:15,678 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:30:15,729 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-09 13:30:15,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:15,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-09 13:30:15,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:15,783 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:15,795 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:15,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:15,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-11-09 13:30:15,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216282780] [2020-11-09 13:30:15,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-09 13:30:15,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:15,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-09 13:30:15,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-11-09 13:30:15,798 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 13 states. [2020-11-09 13:30:16,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:16,195 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-11-09 13:30:16,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-09 13:30:16,196 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-11-09 13:30:16,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:16,197 INFO L225 Difference]: With dead ends: 83 [2020-11-09 13:30:16,197 INFO L226 Difference]: Without dead ends: 78 [2020-11-09 13:30:16,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2020-11-09 13:30:16,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-11-09 13:30:16,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 49. [2020-11-09 13:30:16,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-09 13:30:16,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 117 transitions. [2020-11-09 13:30:16,201 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 117 transitions. Word has length 16 [2020-11-09 13:30:16,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:16,201 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 117 transitions. [2020-11-09 13:30:16,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-09 13:30:16,201 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 117 transitions. [2020-11-09 13:30:16,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-09 13:30:16,202 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:16,202 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:16,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:16,403 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:16,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:16,403 INFO L82 PathProgramCache]: Analyzing trace with hash -518171259, now seen corresponding path program 18 times [2020-11-09 13:30:16,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:16,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33950804] [2020-11-09 13:30:16,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:16,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:16,516 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:16,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33950804] [2020-11-09 13:30:16,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700440601] [2020-11-09 13:30:16,517 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:30:16,581 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-09 13:30:16,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:16,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-09 13:30:16,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:16,610 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:30:16,624 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:16,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:16,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-11-09 13:30:16,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730708471] [2020-11-09 13:30:16,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-09 13:30:16,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:16,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-09 13:30:16,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-11-09 13:30:16,626 INFO L87 Difference]: Start difference. First operand 49 states and 117 transitions. Second operand 13 states. [2020-11-09 13:30:17,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:17,001 INFO L93 Difference]: Finished difference Result 91 states and 215 transitions. [2020-11-09 13:30:17,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-09 13:30:17,002 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-11-09 13:30:17,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:17,003 INFO L225 Difference]: With dead ends: 91 [2020-11-09 13:30:17,003 INFO L226 Difference]: Without dead ends: 82 [2020-11-09 13:30:17,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=281, Invalid=589, Unknown=0, NotChecked=0, Total=870 [2020-11-09 13:30:17,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-11-09 13:30:17,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 59. [2020-11-09 13:30:17,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-11-09 13:30:17,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-11-09 13:30:17,007 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 16 [2020-11-09 13:30:17,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:17,007 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-11-09 13:30:17,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-09 13:30:17,008 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-11-09 13:30:17,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-09 13:30:17,008 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:17,008 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:17,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:17,222 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:17,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:17,222 INFO L82 PathProgramCache]: Analyzing trace with hash 527563414, now seen corresponding path program 19 times [2020-11-09 13:30:17,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:17,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531556823] [2020-11-09 13:30:17,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:17,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:17,333 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:17,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531556823] [2020-11-09 13:30:17,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878114078] [2020-11-09 13:30:17,334 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:30:17,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:17,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-09 13:30:17,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:17,426 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:30:17,438 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:17,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:17,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-09 13:30:17,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613954157] [2020-11-09 13:30:17,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-09 13:30:17,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:17,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-09 13:30:17,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-11-09 13:30:17,441 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-11-09 13:30:18,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:18,015 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-11-09 13:30:18,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-09 13:30:18,016 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-11-09 13:30:18,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:18,016 INFO L225 Difference]: With dead ends: 92 [2020-11-09 13:30:18,016 INFO L226 Difference]: Without dead ends: 83 [2020-11-09 13:30:18,017 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2020-11-09 13:30:18,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-11-09 13:30:18,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 49. [2020-11-09 13:30:18,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-09 13:30:18,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 117 transitions. [2020-11-09 13:30:18,020 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 117 transitions. Word has length 17 [2020-11-09 13:30:18,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:18,021 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 117 transitions. [2020-11-09 13:30:18,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-09 13:30:18,021 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 117 transitions. [2020-11-09 13:30:18,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-09 13:30:18,021 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:18,022 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:18,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:18,231 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:18,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:18,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1116588253, now seen corresponding path program 20 times [2020-11-09 13:30:18,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:18,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229668235] [2020-11-09 13:30:18,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:18,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:18,334 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:18,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229668235] [2020-11-09 13:30:18,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156095197] [2020-11-09 13:30:18,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:30:18,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 13:30:18,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:18,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-09 13:30:18,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:18,416 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:18,450 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:18,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:18,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-09 13:30:18,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989076666] [2020-11-09 13:30:18,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-09 13:30:18,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:18,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-09 13:30:18,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-11-09 13:30:18,452 INFO L87 Difference]: Start difference. First operand 49 states and 117 transitions. Second operand 14 states. [2020-11-09 13:30:18,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:18,899 INFO L93 Difference]: Finished difference Result 80 states and 193 transitions. [2020-11-09 13:30:18,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-09 13:30:18,899 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-11-09 13:30:18,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:18,900 INFO L225 Difference]: With dead ends: 80 [2020-11-09 13:30:18,900 INFO L226 Difference]: Without dead ends: 75 [2020-11-09 13:30:18,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-11-09 13:30:18,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-11-09 13:30:18,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 61. [2020-11-09 13:30:18,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-11-09 13:30:18,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-11-09 13:30:18,904 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-11-09 13:30:18,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:18,904 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-11-09 13:30:18,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-09 13:30:18,905 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-11-09 13:30:18,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-09 13:30:18,905 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:18,905 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:19,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-11-09 13:30:19,116 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:19,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:19,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1069116582, now seen corresponding path program 21 times [2020-11-09 13:30:19,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:19,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686705546] [2020-11-09 13:30:19,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:19,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:19,303 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:19,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686705546] [2020-11-09 13:30:19,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968805108] [2020-11-09 13:30:19,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:30:19,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-09 13:30:19,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:19,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-09 13:30:19,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:19,380 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:19,407 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:19,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:19,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-11-09 13:30:19,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085076429] [2020-11-09 13:30:19,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-09 13:30:19,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:19,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-09 13:30:19,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-11-09 13:30:19,412 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-11-09 13:30:19,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:19,664 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-11-09 13:30:19,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-09 13:30:19,664 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-11-09 13:30:19,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:19,665 INFO L225 Difference]: With dead ends: 80 [2020-11-09 13:30:19,665 INFO L226 Difference]: Without dead ends: 74 [2020-11-09 13:30:19,666 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2020-11-09 13:30:19,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-11-09 13:30:19,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 64. [2020-11-09 13:30:19,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-11-09 13:30:19,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-11-09 13:30:19,669 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 18 [2020-11-09 13:30:19,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:19,670 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-11-09 13:30:19,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-09 13:30:19,670 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-11-09 13:30:19,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-09 13:30:19,670 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:19,670 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:19,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-11-09 13:30:19,880 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:19,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:19,880 INFO L82 PathProgramCache]: Analyzing trace with hash -825375252, now seen corresponding path program 22 times [2020-11-09 13:30:19,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:19,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650840373] [2020-11-09 13:30:19,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:19,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:19,986 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:19,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650840373] [2020-11-09 13:30:19,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28329652] [2020-11-09 13:30:19,987 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:30:20,036 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 13:30:20,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:20,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-09 13:30:20,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:20,076 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:20,091 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:20,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:20,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-11-09 13:30:20,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65582547] [2020-11-09 13:30:20,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-09 13:30:20,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:20,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-09 13:30:20,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-11-09 13:30:20,093 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 15 states. [2020-11-09 13:30:20,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:20,623 INFO L93 Difference]: Finished difference Result 93 states and 221 transitions. [2020-11-09 13:30:20,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-09 13:30:20,627 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-11-09 13:30:20,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:20,628 INFO L225 Difference]: With dead ends: 93 [2020-11-09 13:30:20,628 INFO L226 Difference]: Without dead ends: 88 [2020-11-09 13:30:20,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2020-11-09 13:30:20,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-11-09 13:30:20,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 53. [2020-11-09 13:30:20,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-09 13:30:20,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 127 transitions. [2020-11-09 13:30:20,633 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 127 transitions. Word has length 18 [2020-11-09 13:30:20,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:20,633 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 127 transitions. [2020-11-09 13:30:20,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-09 13:30:20,633 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 127 transitions. [2020-11-09 13:30:20,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-09 13:30:20,633 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:20,634 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:20,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-11-09 13:30:20,845 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:20,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:20,846 INFO L82 PathProgramCache]: Analyzing trace with hash 254522690, now seen corresponding path program 23 times [2020-11-09 13:30:20,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:20,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061696043] [2020-11-09 13:30:20,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:20,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:20,952 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:20,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061696043] [2020-11-09 13:30:20,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058719642] [2020-11-09 13:30:20,952 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:30:21,031 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-11-09 13:30:21,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:21,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-09 13:30:21,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:21,059 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:30:21,069 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:21,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:21,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-11-09 13:30:21,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902227701] [2020-11-09 13:30:21,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-09 13:30:21,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:21,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-09 13:30:21,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-11-09 13:30:21,072 INFO L87 Difference]: Start difference. First operand 53 states and 127 transitions. Second operand 15 states. [2020-11-09 13:30:21,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:21,666 INFO L93 Difference]: Finished difference Result 101 states and 239 transitions. [2020-11-09 13:30:21,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-09 13:30:21,666 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-11-09 13:30:21,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:21,667 INFO L225 Difference]: With dead ends: 101 [2020-11-09 13:30:21,667 INFO L226 Difference]: Without dead ends: 92 [2020-11-09 13:30:21,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=402, Invalid=858, Unknown=0, NotChecked=0, Total=1260 [2020-11-09 13:30:21,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-11-09 13:30:21,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2020-11-09 13:30:21,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-11-09 13:30:21,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 163 transitions. [2020-11-09 13:30:21,671 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 163 transitions. Word has length 18 [2020-11-09 13:30:21,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:21,671 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 163 transitions. [2020-11-09 13:30:21,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-09 13:30:21,672 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 163 transitions. [2020-11-09 13:30:21,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-09 13:30:21,672 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:21,672 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:21,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-11-09 13:30:21,882 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:21,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:21,883 INFO L82 PathProgramCache]: Analyzing trace with hash 183196179, now seen corresponding path program 24 times [2020-11-09 13:30:21,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:21,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169656533] [2020-11-09 13:30:21,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:21,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:22,003 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:22,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169656533] [2020-11-09 13:30:22,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281725265] [2020-11-09 13:30:22,003 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:30:22,063 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-11-09 13:30:22,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:22,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-09 13:30:22,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:22,102 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:22,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:22,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-11-09 13:30:22,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761163215] [2020-11-09 13:30:22,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-09 13:30:22,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:22,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-09 13:30:22,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-11-09 13:30:22,106 INFO L87 Difference]: Start difference. First operand 65 states and 163 transitions. Second operand 16 states. [2020-11-09 13:30:22,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:22,750 INFO L93 Difference]: Finished difference Result 102 states and 241 transitions. [2020-11-09 13:30:22,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-09 13:30:22,750 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-11-09 13:30:22,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:22,752 INFO L225 Difference]: With dead ends: 102 [2020-11-09 13:30:22,752 INFO L226 Difference]: Without dead ends: 93 [2020-11-09 13:30:22,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=436, Invalid=1046, Unknown=0, NotChecked=0, Total=1482 [2020-11-09 13:30:22,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-11-09 13:30:22,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 53. [2020-11-09 13:30:22,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-09 13:30:22,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 127 transitions. [2020-11-09 13:30:22,756 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 127 transitions. Word has length 19 [2020-11-09 13:30:22,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:22,756 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 127 transitions. [2020-11-09 13:30:22,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-09 13:30:22,757 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 127 transitions. [2020-11-09 13:30:22,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-09 13:30:22,757 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:22,757 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:22,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-11-09 13:30:22,960 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:22,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:22,960 INFO L82 PathProgramCache]: Analyzing trace with hash -699703104, now seen corresponding path program 25 times [2020-11-09 13:30:22,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:22,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777750906] [2020-11-09 13:30:22,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:22,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:23,093 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:23,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777750906] [2020-11-09 13:30:23,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126274382] [2020-11-09 13:30:23,094 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:30:23,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:23,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-09 13:30:23,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:23,189 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:23,207 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:23,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:23,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-11-09 13:30:23,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062504243] [2020-11-09 13:30:23,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-09 13:30:23,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:23,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-09 13:30:23,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-11-09 13:30:23,209 INFO L87 Difference]: Start difference. First operand 53 states and 127 transitions. Second operand 16 states. [2020-11-09 13:30:23,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:23,809 INFO L93 Difference]: Finished difference Result 88 states and 213 transitions. [2020-11-09 13:30:23,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-09 13:30:23,809 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-11-09 13:30:23,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:23,810 INFO L225 Difference]: With dead ends: 88 [2020-11-09 13:30:23,810 INFO L226 Difference]: Without dead ends: 83 [2020-11-09 13:30:23,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=439, Invalid=893, Unknown=0, NotChecked=0, Total=1332 [2020-11-09 13:30:23,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-11-09 13:30:23,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 67. [2020-11-09 13:30:23,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-11-09 13:30:23,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-11-09 13:30:23,814 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 19 [2020-11-09 13:30:23,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:23,814 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-11-09 13:30:23,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-09 13:30:23,814 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-11-09 13:30:23,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-09 13:30:23,814 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:23,815 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:24,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:24,023 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:24,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:24,023 INFO L82 PathProgramCache]: Analyzing trace with hash -923845315, now seen corresponding path program 26 times [2020-11-09 13:30:24,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:24,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994686559] [2020-11-09 13:30:24,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:24,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:24,216 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:24,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994686559] [2020-11-09 13:30:24,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777445160] [2020-11-09 13:30:24,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:30:24,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 13:30:24,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:24,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-09 13:30:24,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:24,277 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:24,297 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:24,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:24,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-11-09 13:30:24,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990366367] [2020-11-09 13:30:24,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-09 13:30:24,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:24,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-09 13:30:24,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-11-09 13:30:24,299 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 16 states. [2020-11-09 13:30:24,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:24,603 INFO L93 Difference]: Finished difference Result 88 states and 211 transitions. [2020-11-09 13:30:24,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-09 13:30:24,604 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-11-09 13:30:24,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:24,605 INFO L225 Difference]: With dead ends: 88 [2020-11-09 13:30:24,605 INFO L226 Difference]: Without dead ends: 82 [2020-11-09 13:30:24,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=273, Invalid=539, Unknown=0, NotChecked=0, Total=812 [2020-11-09 13:30:24,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-11-09 13:30:24,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 70. [2020-11-09 13:30:24,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-11-09 13:30:24,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 175 transitions. [2020-11-09 13:30:24,609 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 175 transitions. Word has length 20 [2020-11-09 13:30:24,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:24,609 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 175 transitions. [2020-11-09 13:30:24,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-09 13:30:24,610 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 175 transitions. [2020-11-09 13:30:24,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-09 13:30:24,610 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:24,610 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:24,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-11-09 13:30:24,820 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:24,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:24,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1384142351, now seen corresponding path program 27 times [2020-11-09 13:30:24,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:24,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689523240] [2020-11-09 13:30:24,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:24,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:24,960 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:24,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689523240] [2020-11-09 13:30:24,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727927311] [2020-11-09 13:30:24,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:30:25,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-11-09 13:30:25,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:25,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-09 13:30:25,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:25,067 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:25,082 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:25,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:25,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-11-09 13:30:25,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852635862] [2020-11-09 13:30:25,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-09 13:30:25,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:25,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-09 13:30:25,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-11-09 13:30:25,084 INFO L87 Difference]: Start difference. First operand 70 states and 175 transitions. Second operand 17 states. [2020-11-09 13:30:25,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:25,701 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-11-09 13:30:25,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-09 13:30:25,701 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-11-09 13:30:25,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:25,703 INFO L225 Difference]: With dead ends: 103 [2020-11-09 13:30:25,703 INFO L226 Difference]: Without dead ends: 98 [2020-11-09 13:30:25,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=574, Invalid=1148, Unknown=0, NotChecked=0, Total=1722 [2020-11-09 13:30:25,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-09 13:30:25,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 57. [2020-11-09 13:30:25,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-11-09 13:30:25,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 137 transitions. [2020-11-09 13:30:25,707 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 137 transitions. Word has length 20 [2020-11-09 13:30:25,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:25,707 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 137 transitions. [2020-11-09 13:30:25,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-09 13:30:25,707 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 137 transitions. [2020-11-09 13:30:25,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-09 13:30:25,708 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:25,708 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:25,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-11-09 13:30:25,917 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:25,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:25,918 INFO L82 PathProgramCache]: Analyzing trace with hash -215934529, now seen corresponding path program 28 times [2020-11-09 13:30:25,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:25,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88167652] [2020-11-09 13:30:25,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:25,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:26,036 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:26,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88167652] [2020-11-09 13:30:26,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041415730] [2020-11-09 13:30:26,036 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:30:26,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 13:30:26,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:26,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-09 13:30:26,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:26,125 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:30:26,141 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:26,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:26,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-11-09 13:30:26,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507493574] [2020-11-09 13:30:26,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-09 13:30:26,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:26,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-09 13:30:26,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-11-09 13:30:26,143 INFO L87 Difference]: Start difference. First operand 57 states and 137 transitions. Second operand 17 states. [2020-11-09 13:30:26,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:26,884 INFO L93 Difference]: Finished difference Result 111 states and 263 transitions. [2020-11-09 13:30:26,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-09 13:30:26,889 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-11-09 13:30:26,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:26,890 INFO L225 Difference]: With dead ends: 111 [2020-11-09 13:30:26,891 INFO L226 Difference]: Without dead ends: 102 [2020-11-09 13:30:26,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=545, Invalid=1177, Unknown=0, NotChecked=0, Total=1722 [2020-11-09 13:30:26,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-11-09 13:30:26,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 71. [2020-11-09 13:30:26,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-11-09 13:30:26,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 179 transitions. [2020-11-09 13:30:26,895 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 179 transitions. Word has length 20 [2020-11-09 13:30:26,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:26,895 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 179 transitions. [2020-11-09 13:30:26,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-09 13:30:26,896 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 179 transitions. [2020-11-09 13:30:26,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-09 13:30:26,896 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:26,896 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:27,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:27,108 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:27,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:27,108 INFO L82 PathProgramCache]: Analyzing trace with hash -41234864, now seen corresponding path program 29 times [2020-11-09 13:30:27,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:27,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139321487] [2020-11-09 13:30:27,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:27,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:27,254 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:27,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139321487] [2020-11-09 13:30:27,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267987425] [2020-11-09 13:30:27,255 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:30:27,316 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-11-09 13:30:27,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:27,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-09 13:30:27,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:27,346 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:30:27,359 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:27,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:27,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-11-09 13:30:27,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729062287] [2020-11-09 13:30:27,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-09 13:30:27,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:27,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-09 13:30:27,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-11-09 13:30:27,361 INFO L87 Difference]: Start difference. First operand 71 states and 179 transitions. Second operand 18 states. [2020-11-09 13:30:28,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:28,137 INFO L93 Difference]: Finished difference Result 112 states and 265 transitions. [2020-11-09 13:30:28,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-09 13:30:28,137 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-11-09 13:30:28,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:28,138 INFO L225 Difference]: With dead ends: 112 [2020-11-09 13:30:28,138 INFO L226 Difference]: Without dead ends: 103 [2020-11-09 13:30:28,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=623, Invalid=1357, Unknown=0, NotChecked=0, Total=1980 [2020-11-09 13:30:28,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-11-09 13:30:28,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 57. [2020-11-09 13:30:28,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-11-09 13:30:28,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 137 transitions. [2020-11-09 13:30:28,144 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 137 transitions. Word has length 21 [2020-11-09 13:30:28,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:28,144 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 137 transitions. [2020-11-09 13:30:28,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-09 13:30:28,144 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 137 transitions. [2020-11-09 13:30:28,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-09 13:30:28,145 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:28,145 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:28,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:28,354 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:28,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:28,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1895992291, now seen corresponding path program 30 times [2020-11-09 13:30:28,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:28,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402277193] [2020-11-09 13:30:28,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:28,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:28,508 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:28,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402277193] [2020-11-09 13:30:28,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80249076] [2020-11-09 13:30:28,509 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:30:28,571 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-11-09 13:30:28,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:28,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-09 13:30:28,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:28,600 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:28,616 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:28,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:28,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-11-09 13:30:28,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980536057] [2020-11-09 13:30:28,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-09 13:30:28,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:28,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-09 13:30:28,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-11-09 13:30:28,618 INFO L87 Difference]: Start difference. First operand 57 states and 137 transitions. Second operand 18 states. [2020-11-09 13:30:29,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:29,355 INFO L93 Difference]: Finished difference Result 96 states and 233 transitions. [2020-11-09 13:30:29,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-09 13:30:29,359 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-11-09 13:30:29,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:29,360 INFO L225 Difference]: With dead ends: 96 [2020-11-09 13:30:29,361 INFO L226 Difference]: Without dead ends: 91 [2020-11-09 13:30:29,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=589, Invalid=1217, Unknown=0, NotChecked=0, Total=1806 [2020-11-09 13:30:29,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-11-09 13:30:29,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 73. [2020-11-09 13:30:29,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-11-09 13:30:29,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2020-11-09 13:30:29,365 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 21 [2020-11-09 13:30:29,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:29,365 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2020-11-09 13:30:29,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-09 13:30:29,365 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2020-11-09 13:30:29,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-09 13:30:29,365 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:29,366 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:29,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-11-09 13:30:29,571 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:29,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:29,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1242888800, now seen corresponding path program 31 times [2020-11-09 13:30:29,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:29,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266004728] [2020-11-09 13:30:29,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:29,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:29,794 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:29,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266004728] [2020-11-09 13:30:29,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102710968] [2020-11-09 13:30:29,795 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:30:29,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:29,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-09 13:30:29,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:29,857 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:29,873 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:29,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:29,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-11-09 13:30:29,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339587813] [2020-11-09 13:30:29,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-09 13:30:29,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:29,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-09 13:30:29,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-11-09 13:30:29,875 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand 18 states. [2020-11-09 13:30:30,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:30,224 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-11-09 13:30:30,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-09 13:30:30,225 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-11-09 13:30:30,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:30,226 INFO L225 Difference]: With dead ends: 96 [2020-11-09 13:30:30,226 INFO L226 Difference]: Without dead ends: 90 [2020-11-09 13:30:30,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=352, Invalid=704, Unknown=0, NotChecked=0, Total=1056 [2020-11-09 13:30:30,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-11-09 13:30:30,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 76. [2020-11-09 13:30:30,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-11-09 13:30:30,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 191 transitions. [2020-11-09 13:30:30,233 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 191 transitions. Word has length 22 [2020-11-09 13:30:30,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:30,233 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 191 transitions. [2020-11-09 13:30:30,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-09 13:30:30,233 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 191 transitions. [2020-11-09 13:30:30,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-09 13:30:30,234 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:30,234 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:30,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:30,442 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:30,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:30,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1278252686, now seen corresponding path program 32 times [2020-11-09 13:30:30,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:30,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276853080] [2020-11-09 13:30:30,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:30,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:30,595 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:30,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276853080] [2020-11-09 13:30:30,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511279306] [2020-11-09 13:30:30,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:30:30,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 13:30:30,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:30,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-09 13:30:30,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:30,683 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:30,699 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:30,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:30,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-11-09 13:30:30,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865868634] [2020-11-09 13:30:30,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-09 13:30:30,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:30,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-09 13:30:30,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-11-09 13:30:30,701 INFO L87 Difference]: Start difference. First operand 76 states and 191 transitions. Second operand 19 states. [2020-11-09 13:30:31,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:31,464 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-11-09 13:30:31,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-09 13:30:31,465 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-11-09 13:30:31,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:31,466 INFO L225 Difference]: With dead ends: 113 [2020-11-09 13:30:31,466 INFO L226 Difference]: Without dead ends: 108 [2020-11-09 13:30:31,467 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=745, Invalid=1511, Unknown=0, NotChecked=0, Total=2256 [2020-11-09 13:30:31,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-11-09 13:30:31,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 61. [2020-11-09 13:30:31,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-11-09 13:30:31,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 147 transitions. [2020-11-09 13:30:31,470 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 147 transitions. Word has length 22 [2020-11-09 13:30:31,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:31,471 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 147 transitions. [2020-11-09 13:30:31,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-09 13:30:31,471 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 147 transitions. [2020-11-09 13:30:31,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-09 13:30:31,471 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:31,471 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:31,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-11-09 13:30:31,676 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:31,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:31,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1353755908, now seen corresponding path program 33 times [2020-11-09 13:30:31,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:31,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033757637] [2020-11-09 13:30:31,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:31,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:31,863 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:31,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033757637] [2020-11-09 13:30:31,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757867629] [2020-11-09 13:30:31,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:30:31,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-11-09 13:30:31,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:31,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-09 13:30:31,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:31,960 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:30:31,975 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:31,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:31,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-11-09 13:30:31,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174827425] [2020-11-09 13:30:31,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-09 13:30:31,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:31,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-09 13:30:31,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-11-09 13:30:31,977 INFO L87 Difference]: Start difference. First operand 61 states and 147 transitions. Second operand 19 states. [2020-11-09 13:30:32,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:32,785 INFO L93 Difference]: Finished difference Result 121 states and 287 transitions. [2020-11-09 13:30:32,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-09 13:30:32,786 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-11-09 13:30:32,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:32,787 INFO L225 Difference]: With dead ends: 121 [2020-11-09 13:30:32,788 INFO L226 Difference]: Without dead ends: 112 [2020-11-09 13:30:32,789 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=710, Invalid=1546, Unknown=0, NotChecked=0, Total=2256 [2020-11-09 13:30:32,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-11-09 13:30:32,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 77. [2020-11-09 13:30:32,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-11-09 13:30:32,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 195 transitions. [2020-11-09 13:30:32,793 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 195 transitions. Word has length 22 [2020-11-09 13:30:32,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:32,793 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 195 transitions. [2020-11-09 13:30:32,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-09 13:30:32,793 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 195 transitions. [2020-11-09 13:30:32,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-09 13:30:32,793 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:32,794 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:33,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:33,006 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:33,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:33,006 INFO L82 PathProgramCache]: Analyzing trace with hash -971102387, now seen corresponding path program 34 times [2020-11-09 13:30:33,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:33,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986857082] [2020-11-09 13:30:33,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:33,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:33,187 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:33,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986857082] [2020-11-09 13:30:33,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844753283] [2020-11-09 13:30:33,187 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:30:33,248 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 13:30:33,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:33,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-09 13:30:33,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:33,281 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:30:33,295 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:33,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:33,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-11-09 13:30:33,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891028320] [2020-11-09 13:30:33,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-09 13:30:33,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:33,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-09 13:30:33,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-11-09 13:30:33,297 INFO L87 Difference]: Start difference. First operand 77 states and 195 transitions. Second operand 20 states. [2020-11-09 13:30:34,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:34,166 INFO L93 Difference]: Finished difference Result 122 states and 289 transitions. [2020-11-09 13:30:34,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-09 13:30:34,166 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-11-09 13:30:34,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:34,167 INFO L225 Difference]: With dead ends: 122 [2020-11-09 13:30:34,167 INFO L226 Difference]: Without dead ends: 113 [2020-11-09 13:30:34,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=799, Invalid=1751, Unknown=0, NotChecked=0, Total=2550 [2020-11-09 13:30:34,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-11-09 13:30:34,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 61. [2020-11-09 13:30:34,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-11-09 13:30:34,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 147 transitions. [2020-11-09 13:30:34,172 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 147 transitions. Word has length 23 [2020-11-09 13:30:34,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:34,172 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 147 transitions. [2020-11-09 13:30:34,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-09 13:30:34,173 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 147 transitions. [2020-11-09 13:30:34,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-09 13:30:34,173 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:34,173 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:34,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-11-09 13:30:34,383 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:34,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:34,383 INFO L82 PathProgramCache]: Analyzing trace with hash 983267910, now seen corresponding path program 35 times [2020-11-09 13:30:34,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:34,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805786225] [2020-11-09 13:30:34,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:34,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:34,553 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:34,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805786225] [2020-11-09 13:30:34,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363786971] [2020-11-09 13:30:34,554 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:30:34,618 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-11-09 13:30:34,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:34,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-09 13:30:34,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:34,643 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:34,660 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:34,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:34,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-11-09 13:30:34,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195077979] [2020-11-09 13:30:34,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-09 13:30:34,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:34,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-09 13:30:34,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-11-09 13:30:34,663 INFO L87 Difference]: Start difference. First operand 61 states and 147 transitions. Second operand 20 states. [2020-11-09 13:30:35,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:35,511 INFO L93 Difference]: Finished difference Result 104 states and 253 transitions. [2020-11-09 13:30:35,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-09 13:30:35,511 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-11-09 13:30:35,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:35,513 INFO L225 Difference]: With dead ends: 104 [2020-11-09 13:30:35,513 INFO L226 Difference]: Without dead ends: 99 [2020-11-09 13:30:35,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=761, Invalid=1591, Unknown=0, NotChecked=0, Total=2352 [2020-11-09 13:30:35,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-11-09 13:30:35,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 79. [2020-11-09 13:30:35,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-11-09 13:30:35,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 201 transitions. [2020-11-09 13:30:35,518 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 201 transitions. Word has length 23 [2020-11-09 13:30:35,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:35,518 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 201 transitions. [2020-11-09 13:30:35,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-09 13:30:35,518 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 201 transitions. [2020-11-09 13:30:35,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-09 13:30:35,519 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:35,519 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:35,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-11-09 13:30:35,729 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:35,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:35,730 INFO L82 PathProgramCache]: Analyzing trace with hash 415234755, now seen corresponding path program 36 times [2020-11-09 13:30:35,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:35,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153664775] [2020-11-09 13:30:35,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:35,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:35,984 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:35,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153664775] [2020-11-09 13:30:35,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946711663] [2020-11-09 13:30:35,985 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:30:36,054 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-11-09 13:30:36,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:36,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-09 13:30:36,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:36,058 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:36,073 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:36,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:36,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-11-09 13:30:36,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18008860] [2020-11-09 13:30:36,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-09 13:30:36,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:36,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-09 13:30:36,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-11-09 13:30:36,075 INFO L87 Difference]: Start difference. First operand 79 states and 201 transitions. Second operand 20 states. [2020-11-09 13:30:36,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:36,503 INFO L93 Difference]: Finished difference Result 104 states and 251 transitions. [2020-11-09 13:30:36,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-09 13:30:36,504 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-11-09 13:30:36,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:36,505 INFO L225 Difference]: With dead ends: 104 [2020-11-09 13:30:36,505 INFO L226 Difference]: Without dead ends: 98 [2020-11-09 13:30:36,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=441, Invalid=891, Unknown=0, NotChecked=0, Total=1332 [2020-11-09 13:30:36,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-09 13:30:36,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 82. [2020-11-09 13:30:36,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-11-09 13:30:36,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 207 transitions. [2020-11-09 13:30:36,510 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 207 transitions. Word has length 24 [2020-11-09 13:30:36,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:36,510 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 207 transitions. [2020-11-09 13:30:36,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-09 13:30:36,510 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 207 transitions. [2020-11-09 13:30:36,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-09 13:30:36,510 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:36,511 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:36,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-11-09 13:30:36,722 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:36,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:36,722 INFO L82 PathProgramCache]: Analyzing trace with hash -39374827, now seen corresponding path program 37 times [2020-11-09 13:30:36,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:36,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701075894] [2020-11-09 13:30:36,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:36,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:36,895 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:36,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701075894] [2020-11-09 13:30:36,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206535689] [2020-11-09 13:30:36,897 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:30:36,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:36,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-09 13:30:36,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:37,021 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:37,040 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:37,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:37,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-11-09 13:30:37,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180981597] [2020-11-09 13:30:37,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-09 13:30:37,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:37,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-09 13:30:37,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-11-09 13:30:37,042 INFO L87 Difference]: Start difference. First operand 82 states and 207 transitions. Second operand 21 states. [2020-11-09 13:30:37,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:37,928 INFO L93 Difference]: Finished difference Result 123 states and 293 transitions. [2020-11-09 13:30:37,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-09 13:30:37,928 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-11-09 13:30:37,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:37,929 INFO L225 Difference]: With dead ends: 123 [2020-11-09 13:30:37,929 INFO L226 Difference]: Without dead ends: 118 [2020-11-09 13:30:37,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=938, Invalid=1924, Unknown=0, NotChecked=0, Total=2862 [2020-11-09 13:30:37,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-11-09 13:30:37,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 65. [2020-11-09 13:30:37,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-11-09 13:30:37,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 157 transitions. [2020-11-09 13:30:37,934 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 157 transitions. Word has length 24 [2020-11-09 13:30:37,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:37,934 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 157 transitions. [2020-11-09 13:30:37,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-09 13:30:37,934 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 157 transitions. [2020-11-09 13:30:37,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-09 13:30:37,935 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:37,935 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:38,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-11-09 13:30:38,144 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:38,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:38,144 INFO L82 PathProgramCache]: Analyzing trace with hash 416559353, now seen corresponding path program 38 times [2020-11-09 13:30:38,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:38,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714498640] [2020-11-09 13:30:38,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:38,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:38,314 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:38,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714498640] [2020-11-09 13:30:38,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999036862] [2020-11-09 13:30:38,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:30:38,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 13:30:38,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:38,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-09 13:30:38,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:38,414 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:38,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:38,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-11-09 13:30:38,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083550351] [2020-11-09 13:30:38,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-09 13:30:38,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:38,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-09 13:30:38,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-11-09 13:30:38,416 INFO L87 Difference]: Start difference. First operand 65 states and 157 transitions. Second operand 21 states. [2020-11-09 13:30:39,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:39,320 INFO L93 Difference]: Finished difference Result 131 states and 311 transitions. [2020-11-09 13:30:39,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-09 13:30:39,321 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-11-09 13:30:39,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:39,322 INFO L225 Difference]: With dead ends: 131 [2020-11-09 13:30:39,322 INFO L226 Difference]: Without dead ends: 122 [2020-11-09 13:30:39,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=746, Invalid=1906, Unknown=0, NotChecked=0, Total=2652 [2020-11-09 13:30:39,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-11-09 13:30:39,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 83. [2020-11-09 13:30:39,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-11-09 13:30:39,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 211 transitions. [2020-11-09 13:30:39,326 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 211 transitions. Word has length 24 [2020-11-09 13:30:39,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:39,327 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 211 transitions. [2020-11-09 13:30:39,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-09 13:30:39,327 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 211 transitions. [2020-11-09 13:30:39,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-09 13:30:39,327 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:39,327 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:39,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-11-09 13:30:39,539 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:39,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:39,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1220594422, now seen corresponding path program 39 times [2020-11-09 13:30:39,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:39,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534805987] [2020-11-09 13:30:39,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:39,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:39,730 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:39,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534805987] [2020-11-09 13:30:39,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367581521] [2020-11-09 13:30:39,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:30:39,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-11-09 13:30:39,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:39,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-09 13:30:39,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:39,853 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:39,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:39,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-09 13:30:39,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530822778] [2020-11-09 13:30:39,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-09 13:30:39,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:39,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-09 13:30:39,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-11-09 13:30:39,855 INFO L87 Difference]: Start difference. First operand 83 states and 211 transitions. Second operand 22 states. [2020-11-09 13:30:40,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:40,903 INFO L93 Difference]: Finished difference Result 132 states and 313 transitions. [2020-11-09 13:30:40,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-09 13:30:40,907 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-11-09 13:30:40,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:40,908 INFO L225 Difference]: With dead ends: 132 [2020-11-09 13:30:40,908 INFO L226 Difference]: Without dead ends: 123 [2020-11-09 13:30:40,910 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=910, Invalid=2282, Unknown=0, NotChecked=0, Total=3192 [2020-11-09 13:30:40,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-11-09 13:30:40,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 65. [2020-11-09 13:30:40,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-11-09 13:30:40,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 157 transitions. [2020-11-09 13:30:40,912 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 157 transitions. Word has length 25 [2020-11-09 13:30:40,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:40,913 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 157 transitions. [2020-11-09 13:30:40,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-09 13:30:40,913 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 157 transitions. [2020-11-09 13:30:40,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-09 13:30:40,913 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:40,913 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:41,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-11-09 13:30:41,122 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:41,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:41,122 INFO L82 PathProgramCache]: Analyzing trace with hash 28466153, now seen corresponding path program 40 times [2020-11-09 13:30:41,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:41,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407393460] [2020-11-09 13:30:41,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:41,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:41,305 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:41,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407393460] [2020-11-09 13:30:41,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189231123] [2020-11-09 13:30:41,306 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:30:41,361 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 13:30:41,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:41,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-09 13:30:41,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:41,389 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:41,405 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:41,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:41,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-09 13:30:41,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461716952] [2020-11-09 13:30:41,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-09 13:30:41,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:41,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-09 13:30:41,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-11-09 13:30:41,407 INFO L87 Difference]: Start difference. First operand 65 states and 157 transitions. Second operand 22 states. [2020-11-09 13:30:42,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:42,405 INFO L93 Difference]: Finished difference Result 112 states and 273 transitions. [2020-11-09 13:30:42,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-09 13:30:42,405 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-11-09 13:30:42,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:42,406 INFO L225 Difference]: With dead ends: 112 [2020-11-09 13:30:42,406 INFO L226 Difference]: Without dead ends: 107 [2020-11-09 13:30:42,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=955, Invalid=2015, Unknown=0, NotChecked=0, Total=2970 [2020-11-09 13:30:42,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-11-09 13:30:42,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 85. [2020-11-09 13:30:42,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-11-09 13:30:42,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 217 transitions. [2020-11-09 13:30:42,410 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 217 transitions. Word has length 25 [2020-11-09 13:30:42,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:42,411 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 217 transitions. [2020-11-09 13:30:42,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-09 13:30:42,411 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 217 transitions. [2020-11-09 13:30:42,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-09 13:30:42,411 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:42,411 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:42,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-11-09 13:30:42,620 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:42,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:42,620 INFO L82 PathProgramCache]: Analyzing trace with hash -391352730, now seen corresponding path program 41 times [2020-11-09 13:30:42,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:42,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789775718] [2020-11-09 13:30:42,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:42,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:42,926 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:42,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789775718] [2020-11-09 13:30:42,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692049717] [2020-11-09 13:30:42,927 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:30:42,990 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-11-09 13:30:42,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:42,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-09 13:30:42,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:42,993 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:43,006 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:43,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:43,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-11-09 13:30:43,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505261386] [2020-11-09 13:30:43,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-09 13:30:43,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:43,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-09 13:30:43,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-11-09 13:30:43,008 INFO L87 Difference]: Start difference. First operand 85 states and 217 transitions. Second operand 22 states. [2020-11-09 13:30:43,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:43,521 INFO L93 Difference]: Finished difference Result 112 states and 271 transitions. [2020-11-09 13:30:43,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-09 13:30:43,522 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-11-09 13:30:43,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:43,523 INFO L225 Difference]: With dead ends: 112 [2020-11-09 13:30:43,523 INFO L226 Difference]: Without dead ends: 106 [2020-11-09 13:30:43,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=540, Invalid=1100, Unknown=0, NotChecked=0, Total=1640 [2020-11-09 13:30:43,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-11-09 13:30:43,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 88. [2020-11-09 13:30:43,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-11-09 13:30:43,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 223 transitions. [2020-11-09 13:30:43,528 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 223 transitions. Word has length 26 [2020-11-09 13:30:43,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:43,528 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 223 transitions. [2020-11-09 13:30:43,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-09 13:30:43,529 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 223 transitions. [2020-11-09 13:30:43,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-09 13:30:43,529 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:43,529 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:43,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:43,740 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:43,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:43,740 INFO L82 PathProgramCache]: Analyzing trace with hash 816306680, now seen corresponding path program 42 times [2020-11-09 13:30:43,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:43,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958417193] [2020-11-09 13:30:43,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:43,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:43,972 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:43,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958417193] [2020-11-09 13:30:43,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904850221] [2020-11-09 13:30:43,973 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:30:44,047 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-11-09 13:30:44,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:44,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-09 13:30:44,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:44,085 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:44,106 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:44,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:44,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-11-09 13:30:44,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569408864] [2020-11-09 13:30:44,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-09 13:30:44,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:44,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-09 13:30:44,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-11-09 13:30:44,108 INFO L87 Difference]: Start difference. First operand 88 states and 223 transitions. Second operand 23 states. [2020-11-09 13:30:45,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:45,291 INFO L93 Difference]: Finished difference Result 133 states and 317 transitions. [2020-11-09 13:30:45,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-09 13:30:45,297 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-11-09 13:30:45,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:45,298 INFO L225 Difference]: With dead ends: 133 [2020-11-09 13:30:45,299 INFO L226 Difference]: Without dead ends: 128 [2020-11-09 13:30:45,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1153, Invalid=2387, Unknown=0, NotChecked=0, Total=3540 [2020-11-09 13:30:45,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-11-09 13:30:45,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 69. [2020-11-09 13:30:45,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-11-09 13:30:45,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 167 transitions. [2020-11-09 13:30:45,306 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 167 transitions. Word has length 26 [2020-11-09 13:30:45,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:45,306 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 167 transitions. [2020-11-09 13:30:45,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-09 13:30:45,306 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 167 transitions. [2020-11-09 13:30:45,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-09 13:30:45,307 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:45,307 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:45,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-11-09 13:30:45,519 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:45,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:45,519 INFO L82 PathProgramCache]: Analyzing trace with hash 882475958, now seen corresponding path program 43 times [2020-11-09 13:30:45,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:45,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379122679] [2020-11-09 13:30:45,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:45,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:45,747 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:45,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379122679] [2020-11-09 13:30:45,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741777706] [2020-11-09 13:30:45,748 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:30:45,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:45,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-09 13:30:45,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:45,837 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:30:45,855 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:45,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:45,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-11-09 13:30:45,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675150376] [2020-11-09 13:30:45,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-09 13:30:45,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:45,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-09 13:30:45,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-11-09 13:30:45,857 INFO L87 Difference]: Start difference. First operand 69 states and 167 transitions. Second operand 23 states. [2020-11-09 13:30:47,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:47,146 INFO L93 Difference]: Finished difference Result 141 states and 335 transitions. [2020-11-09 13:30:47,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-09 13:30:47,147 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-11-09 13:30:47,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:47,148 INFO L225 Difference]: With dead ends: 141 [2020-11-09 13:30:47,148 INFO L226 Difference]: Without dead ends: 132 [2020-11-09 13:30:47,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1106, Invalid=2434, Unknown=0, NotChecked=0, Total=3540 [2020-11-09 13:30:47,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-11-09 13:30:47,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 89. [2020-11-09 13:30:47,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-11-09 13:30:47,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 227 transitions. [2020-11-09 13:30:47,152 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 227 transitions. Word has length 26 [2020-11-09 13:30:47,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:47,152 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 227 transitions. [2020-11-09 13:30:47,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-09 13:30:47,152 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 227 transitions. [2020-11-09 13:30:47,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-09 13:30:47,153 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:47,153 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:47,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:47,362 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:47,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:47,362 INFO L82 PathProgramCache]: Analyzing trace with hash -464271481, now seen corresponding path program 44 times [2020-11-09 13:30:47,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:47,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014610636] [2020-11-09 13:30:47,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:47,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:47,586 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:47,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014610636] [2020-11-09 13:30:47,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907642390] [2020-11-09 13:30:47,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:30:47,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 13:30:47,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:47,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-09 13:30:47,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:47,702 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:47,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:47,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-11-09 13:30:47,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681253457] [2020-11-09 13:30:47,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-09 13:30:47,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:47,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-09 13:30:47,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-11-09 13:30:47,704 INFO L87 Difference]: Start difference. First operand 89 states and 227 transitions. Second operand 24 states. [2020-11-09 13:30:48,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:48,976 INFO L93 Difference]: Finished difference Result 142 states and 337 transitions. [2020-11-09 13:30:48,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-09 13:30:48,977 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-11-09 13:30:48,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:48,979 INFO L225 Difference]: With dead ends: 142 [2020-11-09 13:30:48,979 INFO L226 Difference]: Without dead ends: 133 [2020-11-09 13:30:48,980 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1106, Invalid=2800, Unknown=0, NotChecked=0, Total=3906 [2020-11-09 13:30:48,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-11-09 13:30:48,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 69. [2020-11-09 13:30:48,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-11-09 13:30:48,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 167 transitions. [2020-11-09 13:30:48,983 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 167 transitions. Word has length 27 [2020-11-09 13:30:48,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:48,983 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 167 transitions. [2020-11-09 13:30:48,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-09 13:30:48,983 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 167 transitions. [2020-11-09 13:30:48,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-09 13:30:48,984 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:48,984 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:49,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-11-09 13:30:49,195 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:49,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:49,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1586979020, now seen corresponding path program 45 times [2020-11-09 13:30:49,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:49,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81267245] [2020-11-09 13:30:49,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:49,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:49,438 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:49,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81267245] [2020-11-09 13:30:49,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015216062] [2020-11-09 13:30:49,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:30:49,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-11-09 13:30:49,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:49,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-09 13:30:49,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:49,542 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:49,561 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:49,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:49,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-11-09 13:30:49,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56067606] [2020-11-09 13:30:49,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-09 13:30:49,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:49,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-09 13:30:49,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-11-09 13:30:49,563 INFO L87 Difference]: Start difference. First operand 69 states and 167 transitions. Second operand 24 states. [2020-11-09 13:30:50,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:50,878 INFO L93 Difference]: Finished difference Result 120 states and 293 transitions. [2020-11-09 13:30:50,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-09 13:30:50,879 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-11-09 13:30:50,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:50,879 INFO L225 Difference]: With dead ends: 120 [2020-11-09 13:30:50,879 INFO L226 Difference]: Without dead ends: 115 [2020-11-09 13:30:50,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1171, Invalid=2489, Unknown=0, NotChecked=0, Total=3660 [2020-11-09 13:30:50,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-11-09 13:30:50,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 91. [2020-11-09 13:30:50,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-11-09 13:30:50,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 233 transitions. [2020-11-09 13:30:50,884 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 233 transitions. Word has length 27 [2020-11-09 13:30:50,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:50,885 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 233 transitions. [2020-11-09 13:30:50,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-09 13:30:50,885 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 233 transitions. [2020-11-09 13:30:50,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-09 13:30:50,885 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:50,885 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:51,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:51,095 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:51,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:51,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1867154761, now seen corresponding path program 46 times [2020-11-09 13:30:51,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:51,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200353360] [2020-11-09 13:30:51,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:51,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:51,442 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:51,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200353360] [2020-11-09 13:30:51,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346310481] [2020-11-09 13:30:51,443 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:30:51,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 13:30:51,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:51,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-09 13:30:51,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:51,505 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:51,518 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:51,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:51,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-11-09 13:30:51,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325849398] [2020-11-09 13:30:51,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-09 13:30:51,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:51,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-09 13:30:51,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2020-11-09 13:30:51,520 INFO L87 Difference]: Start difference. First operand 91 states and 233 transitions. Second operand 24 states. [2020-11-09 13:30:52,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:52,110 INFO L93 Difference]: Finished difference Result 120 states and 291 transitions. [2020-11-09 13:30:52,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-09 13:30:52,111 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-11-09 13:30:52,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:52,112 INFO L225 Difference]: With dead ends: 120 [2020-11-09 13:30:52,113 INFO L226 Difference]: Without dead ends: 114 [2020-11-09 13:30:52,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=649, Invalid=1331, Unknown=0, NotChecked=0, Total=1980 [2020-11-09 13:30:52,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-11-09 13:30:52,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 94. [2020-11-09 13:30:52,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-11-09 13:30:52,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 239 transitions. [2020-11-09 13:30:52,117 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 239 transitions. Word has length 28 [2020-11-09 13:30:52,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:52,117 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 239 transitions. [2020-11-09 13:30:52,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-09 13:30:52,118 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 239 transitions. [2020-11-09 13:30:52,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-09 13:30:52,118 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:52,118 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:52,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-11-09 13:30:52,330 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:52,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:52,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1507485925, now seen corresponding path program 47 times [2020-11-09 13:30:52,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:52,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597717965] [2020-11-09 13:30:52,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:52,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:52,588 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:52,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597717965] [2020-11-09 13:30:52,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820921872] [2020-11-09 13:30:52,589 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:30:52,649 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-11-09 13:30:52,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:52,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-09 13:30:52,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:52,682 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:52,702 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:52,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:52,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-11-09 13:30:52,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26933894] [2020-11-09 13:30:52,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-09 13:30:52,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:52,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-09 13:30:52,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2020-11-09 13:30:52,703 INFO L87 Difference]: Start difference. First operand 94 states and 239 transitions. Second operand 25 states. [2020-11-09 13:30:54,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:54,052 INFO L93 Difference]: Finished difference Result 143 states and 341 transitions. [2020-11-09 13:30:54,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-09 13:30:54,052 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-11-09 13:30:54,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:54,053 INFO L225 Difference]: With dead ends: 143 [2020-11-09 13:30:54,053 INFO L226 Difference]: Without dead ends: 138 [2020-11-09 13:30:54,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1390, Invalid=2900, Unknown=0, NotChecked=0, Total=4290 [2020-11-09 13:30:54,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-11-09 13:30:54,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 73. [2020-11-09 13:30:54,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-11-09 13:30:54,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 177 transitions. [2020-11-09 13:30:54,057 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 177 transitions. Word has length 28 [2020-11-09 13:30:54,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:54,057 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 177 transitions. [2020-11-09 13:30:54,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-09 13:30:54,058 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 177 transitions. [2020-11-09 13:30:54,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-09 13:30:54,058 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:54,058 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:54,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-11-09 13:30:54,266 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:54,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:54,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1951734579, now seen corresponding path program 48 times [2020-11-09 13:30:54,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:54,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401710770] [2020-11-09 13:30:54,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:54,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:54,530 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:54,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401710770] [2020-11-09 13:30:54,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900679498] [2020-11-09 13:30:54,531 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:30:54,593 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-11-09 13:30:54,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:54,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-09 13:30:54,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:54,625 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:30:54,643 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:54,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:54,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-11-09 13:30:54,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999643383] [2020-11-09 13:30:54,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-09 13:30:54,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:54,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-09 13:30:54,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2020-11-09 13:30:54,645 INFO L87 Difference]: Start difference. First operand 73 states and 177 transitions. Second operand 25 states. [2020-11-09 13:30:56,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:56,113 INFO L93 Difference]: Finished difference Result 151 states and 359 transitions. [2020-11-09 13:30:56,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-09 13:30:56,114 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-11-09 13:30:56,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:56,116 INFO L225 Difference]: With dead ends: 151 [2020-11-09 13:30:56,116 INFO L226 Difference]: Without dead ends: 142 [2020-11-09 13:30:56,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1140 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1337, Invalid=2953, Unknown=0, NotChecked=0, Total=4290 [2020-11-09 13:30:56,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-11-09 13:30:56,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 95. [2020-11-09 13:30:56,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-11-09 13:30:56,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 243 transitions. [2020-11-09 13:30:56,120 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 243 transitions. Word has length 28 [2020-11-09 13:30:56,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:56,120 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 243 transitions. [2020-11-09 13:30:56,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-09 13:30:56,121 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 243 transitions. [2020-11-09 13:30:56,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-09 13:30:56,121 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:56,121 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:56,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-11-09 13:30:56,322 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:56,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:56,323 INFO L82 PathProgramCache]: Analyzing trace with hash 512601796, now seen corresponding path program 49 times [2020-11-09 13:30:56,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:56,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394779183] [2020-11-09 13:30:56,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:56,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:56,599 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:56,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394779183] [2020-11-09 13:30:56,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865906064] [2020-11-09 13:30:56,600 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:30:56,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:56,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-09 13:30:56,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:56,713 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:30:56,731 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:56,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:56,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-11-09 13:30:56,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199649519] [2020-11-09 13:30:56,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-09 13:30:56,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:56,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-09 13:30:56,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2020-11-09 13:30:56,733 INFO L87 Difference]: Start difference. First operand 95 states and 243 transitions. Second operand 26 states. [2020-11-09 13:30:58,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:58,258 INFO L93 Difference]: Finished difference Result 152 states and 361 transitions. [2020-11-09 13:30:58,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-11-09 13:30:58,258 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-11-09 13:30:58,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:58,259 INFO L225 Difference]: With dead ends: 152 [2020-11-09 13:30:58,259 INFO L226 Difference]: Without dead ends: 143 [2020-11-09 13:30:58,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1304 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1459, Invalid=3233, Unknown=0, NotChecked=0, Total=4692 [2020-11-09 13:30:58,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-11-09 13:30:58,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 73. [2020-11-09 13:30:58,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-11-09 13:30:58,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 177 transitions. [2020-11-09 13:30:58,264 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 177 transitions. Word has length 29 [2020-11-09 13:30:58,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:58,264 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 177 transitions. [2020-11-09 13:30:58,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-11-09 13:30:58,264 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 177 transitions. [2020-11-09 13:30:58,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-09 13:30:58,265 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:58,265 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:58,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-11-09 13:30:58,474 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:58,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:58,475 INFO L82 PathProgramCache]: Analyzing trace with hash 374257903, now seen corresponding path program 50 times [2020-11-09 13:30:58,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:58,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048961403] [2020-11-09 13:30:58,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:58,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:58,731 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:58,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048961403] [2020-11-09 13:30:58,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143593634] [2020-11-09 13:30:58,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:30:58,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 13:30:58,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:58,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-09 13:30:58,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:58,820 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:58,848 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:58,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:58,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-11-09 13:30:58,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158988137] [2020-11-09 13:30:58,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-09 13:30:58,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:58,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-09 13:30:58,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=497, Unknown=0, NotChecked=0, Total=650 [2020-11-09 13:30:58,850 INFO L87 Difference]: Start difference. First operand 73 states and 177 transitions. Second operand 26 states. [2020-11-09 13:31:00,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:31:00,357 INFO L93 Difference]: Finished difference Result 128 states and 313 transitions. [2020-11-09 13:31:00,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-09 13:31:00,358 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-11-09 13:31:00,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:31:00,359 INFO L225 Difference]: With dead ends: 128 [2020-11-09 13:31:00,359 INFO L226 Difference]: Without dead ends: 123 [2020-11-09 13:31:00,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1409, Invalid=3013, Unknown=0, NotChecked=0, Total=4422 [2020-11-09 13:31:00,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-11-09 13:31:00,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 97. [2020-11-09 13:31:00,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-11-09 13:31:00,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 249 transitions. [2020-11-09 13:31:00,364 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 249 transitions. Word has length 29 [2020-11-09 13:31:00,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:31:00,364 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 249 transitions. [2020-11-09 13:31:00,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-11-09 13:31:00,364 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 249 transitions. [2020-11-09 13:31:00,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-09 13:31:00,365 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:31:00,365 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:31:00,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:31:00,569 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:31:00,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:31:00,569 INFO L82 PathProgramCache]: Analyzing trace with hash -960598164, now seen corresponding path program 51 times [2020-11-09 13:31:00,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:31:00,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635721608] [2020-11-09 13:31:00,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:31:00,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:31:01,017 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:01,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635721608] [2020-11-09 13:31:01,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003241272] [2020-11-09 13:31:01,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:31:01,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-11-09 13:31:01,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:31:01,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-09 13:31:01,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:31:01,087 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:31:01,102 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:01,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:31:01,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-11-09 13:31:01,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508113637] [2020-11-09 13:31:01,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-09 13:31:01,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:31:01,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-09 13:31:01,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2020-11-09 13:31:01,103 INFO L87 Difference]: Start difference. First operand 97 states and 249 transitions. Second operand 26 states. [2020-11-09 13:31:01,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:31:01,832 INFO L93 Difference]: Finished difference Result 128 states and 311 transitions. [2020-11-09 13:31:01,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-09 13:31:01,833 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-11-09 13:31:01,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:31:01,834 INFO L225 Difference]: With dead ends: 128 [2020-11-09 13:31:01,834 INFO L226 Difference]: Without dead ends: 122 [2020-11-09 13:31:01,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=768, Invalid=1584, Unknown=0, NotChecked=0, Total=2352 [2020-11-09 13:31:01,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-11-09 13:31:01,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 100. [2020-11-09 13:31:01,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-11-09 13:31:01,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 255 transitions. [2020-11-09 13:31:01,838 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 255 transitions. Word has length 30 [2020-11-09 13:31:01,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:31:01,838 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 255 transitions. [2020-11-09 13:31:01,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-11-09 13:31:01,838 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 255 transitions. [2020-11-09 13:31:01,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-09 13:31:01,839 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:31:01,839 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:31:02,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:31:02,048 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:31:02,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:31:02,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1289185410, now seen corresponding path program 52 times [2020-11-09 13:31:02,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:31:02,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124974549] [2020-11-09 13:31:02,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:31:02,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:31:02,415 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:02,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124974549] [2020-11-09 13:31:02,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895144456] [2020-11-09 13:31:02,416 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:31:02,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 13:31:02,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:31:02,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-09 13:31:02,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:31:02,545 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:31:02,569 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:02,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:31:02,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-11-09 13:31:02,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834099624] [2020-11-09 13:31:02,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-09 13:31:02,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:31:02,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-09 13:31:02,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2020-11-09 13:31:02,571 INFO L87 Difference]: Start difference. First operand 100 states and 255 transitions. Second operand 27 states. [2020-11-09 13:31:04,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:31:04,135 INFO L93 Difference]: Finished difference Result 153 states and 365 transitions. [2020-11-09 13:31:04,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-09 13:31:04,136 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-11-09 13:31:04,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:31:04,138 INFO L225 Difference]: With dead ends: 153 [2020-11-09 13:31:04,138 INFO L226 Difference]: Without dead ends: 148 [2020-11-09 13:31:04,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1649, Invalid=3463, Unknown=0, NotChecked=0, Total=5112 [2020-11-09 13:31:04,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-11-09 13:31:04,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 77. [2020-11-09 13:31:04,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-11-09 13:31:04,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 187 transitions. [2020-11-09 13:31:04,142 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 187 transitions. Word has length 30 [2020-11-09 13:31:04,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:31:04,143 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 187 transitions. [2020-11-09 13:31:04,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-11-09 13:31:04,143 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 187 transitions. [2020-11-09 13:31:04,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-09 13:31:04,143 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:31:04,143 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:31:04,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-11-09 13:31:04,355 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:31:04,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:31:04,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1282881680, now seen corresponding path program 53 times [2020-11-09 13:31:04,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:31:04,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732658224] [2020-11-09 13:31:04,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:31:04,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:31:04,673 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:04,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732658224] [2020-11-09 13:31:04,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952157522] [2020-11-09 13:31:04,674 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:31:04,739 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-11-09 13:31:04,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:31:04,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-09 13:31:04,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:31:04,773 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:31:04,796 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:04,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:31:04,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-11-09 13:31:04,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530203100] [2020-11-09 13:31:04,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-09 13:31:04,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:31:04,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-09 13:31:04,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2020-11-09 13:31:04,798 INFO L87 Difference]: Start difference. First operand 77 states and 187 transitions. Second operand 27 states. [2020-11-09 13:31:06,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:31:06,509 INFO L93 Difference]: Finished difference Result 161 states and 383 transitions. [2020-11-09 13:31:06,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-11-09 13:31:06,509 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-11-09 13:31:06,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:31:06,511 INFO L225 Difference]: With dead ends: 161 [2020-11-09 13:31:06,511 INFO L226 Difference]: Without dead ends: 152 [2020-11-09 13:31:06,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1376 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1590, Invalid=3522, Unknown=0, NotChecked=0, Total=5112 [2020-11-09 13:31:06,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-11-09 13:31:06,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 101. [2020-11-09 13:31:06,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-11-09 13:31:06,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 259 transitions. [2020-11-09 13:31:06,515 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 259 transitions. Word has length 30 [2020-11-09 13:31:06,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:31:06,515 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 259 transitions. [2020-11-09 13:31:06,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-11-09 13:31:06,515 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 259 transitions. [2020-11-09 13:31:06,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-09 13:31:06,516 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:31:06,516 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:31:06,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:31:06,725 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:31:06,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:31:06,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1310016831, now seen corresponding path program 54 times [2020-11-09 13:31:06,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:31:06,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770271099] [2020-11-09 13:31:06,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:31:06,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:31:07,066 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:07,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770271099] [2020-11-09 13:31:07,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222922640] [2020-11-09 13:31:07,067 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:31:07,138 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-11-09 13:31:07,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:31:07,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-09 13:31:07,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:31:07,194 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:07,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:31:07,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-11-09 13:31:07,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930430883] [2020-11-09 13:31:07,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-09 13:31:07,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:31:07,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-09 13:31:07,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=579, Unknown=0, NotChecked=0, Total=756 [2020-11-09 13:31:07,198 INFO L87 Difference]: Start difference. First operand 101 states and 259 transitions. Second operand 28 states. [2020-11-09 13:31:08,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:31:08,926 INFO L93 Difference]: Finished difference Result 162 states and 385 transitions. [2020-11-09 13:31:08,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-11-09 13:31:08,926 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-11-09 13:31:08,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:31:08,927 INFO L225 Difference]: With dead ends: 162 [2020-11-09 13:31:08,928 INFO L226 Difference]: Without dead ends: 153 [2020-11-09 13:31:08,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1495 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1555, Invalid=3995, Unknown=0, NotChecked=0, Total=5550 [2020-11-09 13:31:08,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-11-09 13:31:08,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 77. [2020-11-09 13:31:08,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-11-09 13:31:08,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 187 transitions. [2020-11-09 13:31:08,932 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 187 transitions. Word has length 31 [2020-11-09 13:31:08,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:31:08,932 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 187 transitions. [2020-11-09 13:31:08,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-11-09 13:31:08,933 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 187 transitions. [2020-11-09 13:31:08,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-09 13:31:08,933 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:31:08,933 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:31:09,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-11-09 13:31:09,137 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:31:09,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:31:09,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1114598318, now seen corresponding path program 55 times [2020-11-09 13:31:09,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:31:09,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310989961] [2020-11-09 13:31:09,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:31:09,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:31:09,448 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:09,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310989961] [2020-11-09 13:31:09,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23727138] [2020-11-09 13:31:09,448 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:31:09,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:31:09,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-09 13:31:09,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:31:09,563 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:31:09,589 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:09,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:31:09,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-11-09 13:31:09,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160467433] [2020-11-09 13:31:09,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-09 13:31:09,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:31:09,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-09 13:31:09,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=578, Unknown=0, NotChecked=0, Total=756 [2020-11-09 13:31:09,591 INFO L87 Difference]: Start difference. First operand 77 states and 187 transitions. Second operand 28 states. [2020-11-09 13:31:11,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:31:11,328 INFO L93 Difference]: Finished difference Result 136 states and 333 transitions. [2020-11-09 13:31:11,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-09 13:31:11,329 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-11-09 13:31:11,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:31:11,330 INFO L225 Difference]: With dead ends: 136 [2020-11-09 13:31:11,331 INFO L226 Difference]: Without dead ends: 131 [2020-11-09 13:31:11,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1394 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1669, Invalid=3587, Unknown=0, NotChecked=0, Total=5256 [2020-11-09 13:31:11,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-11-09 13:31:11,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 103. [2020-11-09 13:31:11,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-11-09 13:31:11,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 265 transitions. [2020-11-09 13:31:11,334 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 265 transitions. Word has length 31 [2020-11-09 13:31:11,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:31:11,334 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 265 transitions. [2020-11-09 13:31:11,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-11-09 13:31:11,335 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 265 transitions. [2020-11-09 13:31:11,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-09 13:31:11,335 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:31:11,335 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:31:11,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-11-09 13:31:11,540 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:31:11,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:31:11,540 INFO L82 PathProgramCache]: Analyzing trace with hash 283139279, now seen corresponding path program 56 times [2020-11-09 13:31:11,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:31:11,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805308350] [2020-11-09 13:31:11,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:31:11,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:31:12,046 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:12,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805308350] [2020-11-09 13:31:12,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824827682] [2020-11-09 13:31:12,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:31:12,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 13:31:12,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:31:12,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-09 13:31:12,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:31:12,114 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:31:12,133 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:12,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:31:12,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-11-09 13:31:12,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506436817] [2020-11-09 13:31:12,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-09 13:31:12,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:31:12,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-09 13:31:12,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2020-11-09 13:31:12,136 INFO L87 Difference]: Start difference. First operand 103 states and 265 transitions. Second operand 28 states. [2020-11-09 13:31:12,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:31:12,965 INFO L93 Difference]: Finished difference Result 136 states and 331 transitions. [2020-11-09 13:31:12,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-09 13:31:12,966 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-11-09 13:31:12,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:31:12,967 INFO L225 Difference]: With dead ends: 136 [2020-11-09 13:31:12,967 INFO L226 Difference]: Without dead ends: 130 [2020-11-09 13:31:12,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=897, Invalid=1859, Unknown=0, NotChecked=0, Total=2756 [2020-11-09 13:31:12,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-11-09 13:31:12,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 106. [2020-11-09 13:31:12,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-11-09 13:31:12,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 271 transitions. [2020-11-09 13:31:12,971 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 271 transitions. Word has length 32 [2020-11-09 13:31:12,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:31:12,971 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 271 transitions. [2020-11-09 13:31:12,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-11-09 13:31:12,971 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 271 transitions. [2020-11-09 13:31:12,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-09 13:31:12,972 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:31:12,972 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:31:13,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-11-09 13:31:13,181 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:31:13,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:31:13,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1955787999, now seen corresponding path program 57 times [2020-11-09 13:31:13,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:31:13,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106914393] [2020-11-09 13:31:13,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:31:13,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:31:13,523 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:13,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106914393] [2020-11-09 13:31:13,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014565412] [2020-11-09 13:31:13,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:31:13,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-11-09 13:31:13,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:31:13,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-09 13:31:13,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:31:13,662 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:31:13,688 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:13,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:31:13,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-11-09 13:31:13,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911525388] [2020-11-09 13:31:13,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-09 13:31:13,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:31:13,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-09 13:31:13,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=621, Unknown=0, NotChecked=0, Total=812 [2020-11-09 13:31:13,690 INFO L87 Difference]: Start difference. First operand 106 states and 271 transitions. Second operand 29 states. [2020-11-09 13:31:15,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:31:15,465 INFO L93 Difference]: Finished difference Result 163 states and 389 transitions. [2020-11-09 13:31:15,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-11-09 13:31:15,465 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-11-09 13:31:15,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:31:15,466 INFO L225 Difference]: With dead ends: 163 [2020-11-09 13:31:15,467 INFO L226 Difference]: Without dead ends: 158 [2020-11-09 13:31:15,467 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1738 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1930, Invalid=4076, Unknown=0, NotChecked=0, Total=6006 [2020-11-09 13:31:15,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-11-09 13:31:15,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 81. [2020-11-09 13:31:15,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-11-09 13:31:15,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 197 transitions. [2020-11-09 13:31:15,470 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 197 transitions. Word has length 32 [2020-11-09 13:31:15,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:31:15,470 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 197 transitions. [2020-11-09 13:31:15,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-11-09 13:31:15,471 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 197 transitions. [2020-11-09 13:31:15,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-09 13:31:15,471 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:31:15,471 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:31:15,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-11-09 13:31:15,680 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:31:15,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:31:15,680 INFO L82 PathProgramCache]: Analyzing trace with hash -192784275, now seen corresponding path program 58 times [2020-11-09 13:31:15,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:31:15,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580859709] [2020-11-09 13:31:15,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:31:15,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:31:16,090 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:16,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580859709] [2020-11-09 13:31:16,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173591350] [2020-11-09 13:31:16,091 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:31:16,175 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 13:31:16,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:31:16,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-09 13:31:16,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:31:16,228 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:31:16,256 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:16,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:31:16,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-11-09 13:31:16,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521209753] [2020-11-09 13:31:16,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-09 13:31:16,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:31:16,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-09 13:31:16,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=622, Unknown=0, NotChecked=0, Total=812 [2020-11-09 13:31:16,258 INFO L87 Difference]: Start difference. First operand 81 states and 197 transitions. Second operand 29 states. [2020-11-09 13:31:18,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:31:18,326 INFO L93 Difference]: Finished difference Result 171 states and 407 transitions. [2020-11-09 13:31:18,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-11-09 13:31:18,326 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-11-09 13:31:18,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:31:18,327 INFO L225 Difference]: With dead ends: 171 [2020-11-09 13:31:18,327 INFO L226 Difference]: Without dead ends: 162 [2020-11-09 13:31:18,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1634 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1865, Invalid=4141, Unknown=0, NotChecked=0, Total=6006 [2020-11-09 13:31:18,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-11-09 13:31:18,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 107. [2020-11-09 13:31:18,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-11-09 13:31:18,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 275 transitions. [2020-11-09 13:31:18,332 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 275 transitions. Word has length 32 [2020-11-09 13:31:18,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:31:18,332 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 275 transitions. [2020-11-09 13:31:18,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-11-09 13:31:18,332 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 275 transitions. [2020-11-09 13:31:18,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-09 13:31:18,333 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:31:18,333 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:31:18,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-11-09 13:31:18,534 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:31:18,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:31:18,535 INFO L82 PathProgramCache]: Analyzing trace with hash -499860610, now seen corresponding path program 59 times [2020-11-09 13:31:18,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:31:18,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715280507] [2020-11-09 13:31:18,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:31:18,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:31:18,892 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:18,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715280507] [2020-11-09 13:31:18,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987151684] [2020-11-09 13:31:18,893 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:31:18,966 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-11-09 13:31:18,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:31:18,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-09 13:31:18,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:31:19,003 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:31:19,025 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:19,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:31:19,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-11-09 13:31:19,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078396785] [2020-11-09 13:31:19,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-09 13:31:19,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:31:19,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-09 13:31:19,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=666, Unknown=0, NotChecked=0, Total=870 [2020-11-09 13:31:19,026 INFO L87 Difference]: Start difference. First operand 107 states and 275 transitions. Second operand 30 states. [2020-11-09 13:31:21,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:31:21,095 INFO L93 Difference]: Finished difference Result 172 states and 409 transitions. [2020-11-09 13:31:21,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-11-09 13:31:21,096 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-11-09 13:31:21,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:31:21,097 INFO L225 Difference]: With dead ends: 172 [2020-11-09 13:31:21,098 INFO L226 Difference]: Without dead ends: 163 [2020-11-09 13:31:21,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1836 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2009, Invalid=4471, Unknown=0, NotChecked=0, Total=6480 [2020-11-09 13:31:21,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-11-09 13:31:21,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 81. [2020-11-09 13:31:21,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-11-09 13:31:21,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 197 transitions. [2020-11-09 13:31:21,101 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 197 transitions. Word has length 33 [2020-11-09 13:31:21,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:31:21,101 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 197 transitions. [2020-11-09 13:31:21,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-11-09 13:31:21,101 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 197 transitions. [2020-11-09 13:31:21,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-09 13:31:21,101 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:31:21,102 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:31:21,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:31:21,302 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:31:21,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:31:21,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1681317131, now seen corresponding path program 60 times [2020-11-09 13:31:21,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:31:21,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520413804] [2020-11-09 13:31:21,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:31:21,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:31:21,699 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:21,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520413804] [2020-11-09 13:31:21,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298815151] [2020-11-09 13:31:21,699 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:31:21,794 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-11-09 13:31:21,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:31:21,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-09 13:31:21,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:31:21,877 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:21,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:31:21,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-11-09 13:31:21,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808773742] [2020-11-09 13:31:21,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-09 13:31:21,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:31:21,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-09 13:31:21,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=665, Unknown=0, NotChecked=0, Total=870 [2020-11-09 13:31:21,879 INFO L87 Difference]: Start difference. First operand 81 states and 197 transitions. Second operand 30 states. [2020-11-09 13:31:23,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:31:23,838 INFO L93 Difference]: Finished difference Result 144 states and 353 transitions. [2020-11-09 13:31:23,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-11-09 13:31:23,838 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-11-09 13:31:23,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:31:23,839 INFO L225 Difference]: With dead ends: 144 [2020-11-09 13:31:23,840 INFO L226 Difference]: Without dead ends: 139 [2020-11-09 13:31:23,841 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1716 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1814, Invalid=4666, Unknown=0, NotChecked=0, Total=6480 [2020-11-09 13:31:23,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-11-09 13:31:23,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 109. [2020-11-09 13:31:23,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-11-09 13:31:23,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 281 transitions. [2020-11-09 13:31:23,844 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 281 transitions. Word has length 33 [2020-11-09 13:31:23,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:31:23,844 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 281 transitions. [2020-11-09 13:31:23,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-11-09 13:31:23,845 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 281 transitions. [2020-11-09 13:31:23,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-09 13:31:23,845 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:31:23,845 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:31:24,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:31:24,046 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:31:24,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:31:24,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1513913714, now seen corresponding path program 61 times [2020-11-09 13:31:24,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:31:24,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902739178] [2020-11-09 13:31:24,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:31:24,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:31:24,577 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:24,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902739178] [2020-11-09 13:31:24,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547869857] [2020-11-09 13:31:24,578 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:31:24,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:31:24,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-09 13:31:24,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:31:24,656 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:31:24,676 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:24,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:31:24,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-11-09 13:31:24,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216351420] [2020-11-09 13:31:24,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-09 13:31:24,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:31:24,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-09 13:31:24,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2020-11-09 13:31:24,679 INFO L87 Difference]: Start difference. First operand 109 states and 281 transitions. Second operand 30 states. [2020-11-09 13:31:25,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:31:25,616 INFO L93 Difference]: Finished difference Result 144 states and 351 transitions. [2020-11-09 13:31:25,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-09 13:31:25,617 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-11-09 13:31:25,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:31:25,618 INFO L225 Difference]: With dead ends: 144 [2020-11-09 13:31:25,618 INFO L226 Difference]: Without dead ends: 138 [2020-11-09 13:31:25,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1036, Invalid=2156, Unknown=0, NotChecked=0, Total=3192 [2020-11-09 13:31:25,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-11-09 13:31:25,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 112. [2020-11-09 13:31:25,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-11-09 13:31:25,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 287 transitions. [2020-11-09 13:31:25,621 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 287 transitions. Word has length 34 [2020-11-09 13:31:25,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:31:25,622 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 287 transitions. [2020-11-09 13:31:25,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-11-09 13:31:25,622 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 287 transitions. [2020-11-09 13:31:25,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-09 13:31:25,622 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:31:25,622 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:31:25,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-11-09 13:31:25,824 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:31:25,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:31:25,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1684218372, now seen corresponding path program 62 times [2020-11-09 13:31:25,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:31:25,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532234537] [2020-11-09 13:31:25,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:31:25,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:31:26,293 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:26,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532234537] [2020-11-09 13:31:26,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125955912] [2020-11-09 13:31:26,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:31:26,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 13:31:26,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:31:26,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-09 13:31:26,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:31:26,394 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:31:26,422 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:26,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:31:26,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-11-09 13:31:26,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530681207] [2020-11-09 13:31:26,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-09 13:31:26,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:31:26,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-09 13:31:26,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=711, Unknown=0, NotChecked=0, Total=930 [2020-11-09 13:31:26,424 INFO L87 Difference]: Start difference. First operand 112 states and 287 transitions. Second operand 31 states. [2020-11-09 13:31:28,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:31:28,589 INFO L93 Difference]: Finished difference Result 173 states and 413 transitions. [2020-11-09 13:31:28,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-11-09 13:31:28,590 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-11-09 13:31:28,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:31:28,591 INFO L225 Difference]: With dead ends: 173 [2020-11-09 13:31:28,591 INFO L226 Difference]: Without dead ends: 168 [2020-11-09 13:31:28,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2030 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2233, Invalid=4739, Unknown=0, NotChecked=0, Total=6972 [2020-11-09 13:31:28,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-11-09 13:31:28,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 85. [2020-11-09 13:31:28,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-11-09 13:31:28,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 207 transitions. [2020-11-09 13:31:28,594 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 207 transitions. Word has length 34 [2020-11-09 13:31:28,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:31:28,595 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 207 transitions. [2020-11-09 13:31:28,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-11-09 13:31:28,595 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 207 transitions. [2020-11-09 13:31:28,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-09 13:31:28,595 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:31:28,595 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:31:28,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:31:28,798 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:31:28,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:31:28,798 INFO L82 PathProgramCache]: Analyzing trace with hash -581198294, now seen corresponding path program 63 times [2020-11-09 13:31:28,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:31:28,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148680557] [2020-11-09 13:31:28,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:31:28,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:31:29,252 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:29,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148680557] [2020-11-09 13:31:29,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60157376] [2020-11-09 13:31:29,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:31:29,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-11-09 13:31:29,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:31:29,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-09 13:31:29,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:31:29,401 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:29,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:31:29,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-11-09 13:31:29,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599594610] [2020-11-09 13:31:29,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-09 13:31:29,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:31:29,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-09 13:31:29,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=712, Unknown=0, NotChecked=0, Total=930 [2020-11-09 13:31:29,403 INFO L87 Difference]: Start difference. First operand 85 states and 207 transitions. Second operand 31 states. [2020-11-09 13:31:31,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:31:31,470 INFO L93 Difference]: Finished difference Result 181 states and 431 transitions. [2020-11-09 13:31:31,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-11-09 13:31:31,470 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-11-09 13:31:31,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:31:31,472 INFO L225 Difference]: With dead ends: 181 [2020-11-09 13:31:31,472 INFO L226 Difference]: Without dead ends: 172 [2020-11-09 13:31:31,473 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1715 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1826, Invalid=4816, Unknown=0, NotChecked=0, Total=6642 [2020-11-09 13:31:31,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-11-09 13:31:31,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 113. [2020-11-09 13:31:31,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-11-09 13:31:31,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 291 transitions. [2020-11-09 13:31:31,476 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 291 transitions. Word has length 34 [2020-11-09 13:31:31,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:31:31,476 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 291 transitions. [2020-11-09 13:31:31,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-11-09 13:31:31,477 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 291 transitions. [2020-11-09 13:31:31,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-11-09 13:31:31,477 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:31:31,477 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:31:31,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-11-09 13:31:31,686 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:31:31,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:31:31,687 INFO L82 PathProgramCache]: Analyzing trace with hash 671187195, now seen corresponding path program 64 times [2020-11-09 13:31:31,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:31:31,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448795959] [2020-11-09 13:31:31,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:31:31,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:31:32,153 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:32,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448795959] [2020-11-09 13:31:32,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450523059] [2020-11-09 13:31:32,154 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:31:32,216 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 13:31:32,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:31:32,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-09 13:31:32,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:31:32,253 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:31:32,275 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:32,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:31:32,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-11-09 13:31:32,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475919385] [2020-11-09 13:31:32,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-11-09 13:31:32,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:31:32,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-11-09 13:31:32,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=759, Unknown=0, NotChecked=0, Total=992 [2020-11-09 13:31:32,277 INFO L87 Difference]: Start difference. First operand 113 states and 291 transitions. Second operand 32 states. [2020-11-09 13:31:34,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:31:34,636 INFO L93 Difference]: Finished difference Result 182 states and 433 transitions. [2020-11-09 13:31:34,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-11-09 13:31:34,636 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-11-09 13:31:34,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:31:34,637 INFO L225 Difference]: With dead ends: 182 [2020-11-09 13:31:34,637 INFO L226 Difference]: Without dead ends: 173 [2020-11-09 13:31:34,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2135 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2317, Invalid=5165, Unknown=0, NotChecked=0, Total=7482 [2020-11-09 13:31:34,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-11-09 13:31:34,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 85. [2020-11-09 13:31:34,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-11-09 13:31:34,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 207 transitions. [2020-11-09 13:31:34,644 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 207 transitions. Word has length 35 [2020-11-09 13:31:34,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:31:34,644 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 207 transitions. [2020-11-09 13:31:34,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-11-09 13:31:34,644 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 207 transitions. [2020-11-09 13:31:34,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-11-09 13:31:34,645 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:31:34,645 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:31:34,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:31:34,857 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:31:34,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:31:34,857 INFO L82 PathProgramCache]: Analyzing trace with hash -837249832, now seen corresponding path program 65 times [2020-11-09 13:31:34,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:31:34,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479414032] [2020-11-09 13:31:34,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:31:34,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:31:35,347 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:35,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479414032] [2020-11-09 13:31:35,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760448948] [2020-11-09 13:31:35,347 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:31:35,419 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-11-09 13:31:35,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:31:35,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-09 13:31:35,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:31:35,469 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:31:35,496 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:35,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:31:35,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-11-09 13:31:35,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943314961] [2020-11-09 13:31:35,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-11-09 13:31:35,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:31:35,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-11-09 13:31:35,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=758, Unknown=0, NotChecked=0, Total=992 [2020-11-09 13:31:35,499 INFO L87 Difference]: Start difference. First operand 85 states and 207 transitions. Second operand 32 states. [2020-11-09 13:31:37,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:31:37,839 INFO L93 Difference]: Finished difference Result 152 states and 373 transitions. [2020-11-09 13:31:37,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-11-09 13:31:37,840 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-11-09 13:31:37,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:31:37,841 INFO L225 Difference]: With dead ends: 152 [2020-11-09 13:31:37,842 INFO L226 Difference]: Without dead ends: 147 [2020-11-09 13:31:37,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1934 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2255, Invalid=4885, Unknown=0, NotChecked=0, Total=7140 [2020-11-09 13:31:37,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-11-09 13:31:37,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 115. [2020-11-09 13:31:37,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-11-09 13:31:37,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 297 transitions. [2020-11-09 13:31:37,846 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 297 transitions. Word has length 35 [2020-11-09 13:31:37,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:31:37,846 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 297 transitions. [2020-11-09 13:31:37,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-11-09 13:31:37,846 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 297 transitions. [2020-11-09 13:31:37,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-09 13:31:37,847 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:31:37,847 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:31:38,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-11-09 13:31:38,056 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:31:38,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:31:38,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1122827947, now seen corresponding path program 66 times [2020-11-09 13:31:38,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:31:38,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233788304] [2020-11-09 13:31:38,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:31:38,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:31:38,738 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:38,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233788304] [2020-11-09 13:31:38,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624278079] [2020-11-09 13:31:38,738 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:31:38,814 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2020-11-09 13:31:38,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:31:38,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 33 conjunts are in the unsatisfiable core [2020-11-09 13:31:38,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:31:38,818 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:31:38,834 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:38,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:31:38,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2020-11-09 13:31:38,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893718394] [2020-11-09 13:31:38,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-11-09 13:31:38,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:31:38,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-11-09 13:31:38,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=735, Unknown=0, NotChecked=0, Total=992 [2020-11-09 13:31:38,836 INFO L87 Difference]: Start difference. First operand 115 states and 297 transitions. Second operand 32 states. [2020-11-09 13:31:39,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:31:39,952 INFO L93 Difference]: Finished difference Result 152 states and 371 transitions. [2020-11-09 13:31:39,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-09 13:31:39,953 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 36 [2020-11-09 13:31:39,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:31:39,955 INFO L225 Difference]: With dead ends: 152 [2020-11-09 13:31:39,955 INFO L226 Difference]: Without dead ends: 146 [2020-11-09 13:31:39,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1185, Invalid=2475, Unknown=0, NotChecked=0, Total=3660 [2020-11-09 13:31:39,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-11-09 13:31:39,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 118. [2020-11-09 13:31:39,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-11-09 13:31:39,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 303 transitions. [2020-11-09 13:31:39,958 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 303 transitions. Word has length 36 [2020-11-09 13:31:39,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:31:39,959 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 303 transitions. [2020-11-09 13:31:39,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-11-09 13:31:39,959 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 303 transitions. [2020-11-09 13:31:39,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-09 13:31:39,959 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:31:39,959 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:31:40,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:31:40,170 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:31:40,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:31:40,170 INFO L82 PathProgramCache]: Analyzing trace with hash -668005337, now seen corresponding path program 67 times [2020-11-09 13:31:40,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:31:40,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076202831] [2020-11-09 13:31:40,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:31:40,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:31:40,696 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:40,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076202831] [2020-11-09 13:31:40,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897754204] [2020-11-09 13:31:40,697 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:31:40,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:31:40,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 32 conjunts are in the unsatisfiable core [2020-11-09 13:31:40,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:31:40,805 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:31:40,838 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:40,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:31:40,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-11-09 13:31:40,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466398171] [2020-11-09 13:31:40,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-11-09 13:31:40,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:31:40,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-11-09 13:31:40,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=807, Unknown=0, NotChecked=0, Total=1056 [2020-11-09 13:31:40,840 INFO L87 Difference]: Start difference. First operand 118 states and 303 transitions. Second operand 33 states. [2020-11-09 13:31:43,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:31:43,318 INFO L93 Difference]: Finished difference Result 183 states and 437 transitions. [2020-11-09 13:31:43,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-11-09 13:31:43,319 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-11-09 13:31:43,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:31:43,320 INFO L225 Difference]: With dead ends: 183 [2020-11-09 13:31:43,320 INFO L226 Difference]: Without dead ends: 178 [2020-11-09 13:31:43,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2344 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2558, Invalid=5452, Unknown=0, NotChecked=0, Total=8010 [2020-11-09 13:31:43,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-11-09 13:31:43,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 89. [2020-11-09 13:31:43,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-11-09 13:31:43,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 217 transitions. [2020-11-09 13:31:43,325 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 217 transitions. Word has length 36 [2020-11-09 13:31:43,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:31:43,326 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 217 transitions. [2020-11-09 13:31:43,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-11-09 13:31:43,326 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 217 transitions. [2020-11-09 13:31:43,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-09 13:31:43,326 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:31:43,326 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:31:43,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-11-09 13:31:43,537 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:31:43,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:31:43,537 INFO L82 PathProgramCache]: Analyzing trace with hash -184915801, now seen corresponding path program 68 times [2020-11-09 13:31:43,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:31:43,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416739759] [2020-11-09 13:31:43,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:31:43,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:31:44,047 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:44,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416739759] [2020-11-09 13:31:44,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358296264] [2020-11-09 13:31:44,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:31:44,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 13:31:44,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:31:44,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 33 conjunts are in the unsatisfiable core [2020-11-09 13:31:44,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:31:44,183 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:44,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:31:44,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-11-09 13:31:44,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748767571] [2020-11-09 13:31:44,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-11-09 13:31:44,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:31:44,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-11-09 13:31:44,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=808, Unknown=0, NotChecked=0, Total=1056 [2020-11-09 13:31:44,185 INFO L87 Difference]: Start difference. First operand 89 states and 217 transitions. Second operand 33 states. [2020-11-09 13:31:46,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:31:46,541 INFO L93 Difference]: Finished difference Result 191 states and 455 transitions. [2020-11-09 13:31:46,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-11-09 13:31:46,542 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-11-09 13:31:46,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:31:46,543 INFO L225 Difference]: With dead ends: 191 [2020-11-09 13:31:46,543 INFO L226 Difference]: Without dead ends: 182 [2020-11-09 13:31:46,543 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1994 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2099, Invalid=5557, Unknown=0, NotChecked=0, Total=7656 [2020-11-09 13:31:46,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-11-09 13:31:46,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 119. [2020-11-09 13:31:46,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-11-09 13:31:46,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 307 transitions. [2020-11-09 13:31:46,546 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 307 transitions. Word has length 36 [2020-11-09 13:31:46,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:31:46,546 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 307 transitions. [2020-11-09 13:31:46,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-11-09 13:31:46,546 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 307 transitions. [2020-11-09 13:31:46,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-09 13:31:46,547 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:31:46,547 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:31:46,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-11-09 13:31:46,748 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:31:46,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:31:46,748 INFO L82 PathProgramCache]: Analyzing trace with hash 766696248, now seen corresponding path program 69 times [2020-11-09 13:31:46,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:31:46,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216168336] [2020-11-09 13:31:46,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:31:46,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:31:47,287 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:47,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216168336] [2020-11-09 13:31:47,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888186790] [2020-11-09 13:31:47,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:31:47,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-11-09 13:31:47,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:31:47,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 34 conjunts are in the unsatisfiable core [2020-11-09 13:31:47,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:31:47,440 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:47,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:31:47,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-11-09 13:31:47,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31888894] [2020-11-09 13:31:47,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-11-09 13:31:47,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:31:47,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-11-09 13:31:47,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=858, Unknown=0, NotChecked=0, Total=1122 [2020-11-09 13:31:47,441 INFO L87 Difference]: Start difference. First operand 119 states and 307 transitions. Second operand 34 states. [2020-11-09 13:31:49,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:31:49,964 INFO L93 Difference]: Finished difference Result 192 states and 457 transitions. [2020-11-09 13:31:49,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-11-09 13:31:49,965 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2020-11-09 13:31:49,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:31:49,967 INFO L225 Difference]: With dead ends: 192 [2020-11-09 13:31:49,967 INFO L226 Difference]: Without dead ends: 183 [2020-11-09 13:31:49,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2353 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2371, Invalid=6185, Unknown=0, NotChecked=0, Total=8556 [2020-11-09 13:31:49,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-11-09 13:31:49,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 89. [2020-11-09 13:31:49,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-11-09 13:31:49,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 217 transitions. [2020-11-09 13:31:49,971 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 217 transitions. Word has length 37 [2020-11-09 13:31:49,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:31:49,971 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 217 transitions. [2020-11-09 13:31:49,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-11-09 13:31:49,971 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 217 transitions. [2020-11-09 13:31:49,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-09 13:31:49,972 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:31:49,972 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:31:50,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:31:50,179 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:31:50,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:31:50,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1437394437, now seen corresponding path program 70 times [2020-11-09 13:31:50,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:31:50,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877751208] [2020-11-09 13:31:50,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:31:50,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:31:50,745 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:50,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877751208] [2020-11-09 13:31:50,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411545578] [2020-11-09 13:31:50,746 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:31:50,810 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 13:31:50,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:31:50,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 33 conjunts are in the unsatisfiable core [2020-11-09 13:31:50,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:31:50,855 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:31:50,888 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:50,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:31:50,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-11-09 13:31:50,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455402628] [2020-11-09 13:31:50,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-11-09 13:31:50,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:31:50,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-11-09 13:31:50,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=857, Unknown=0, NotChecked=0, Total=1122 [2020-11-09 13:31:50,890 INFO L87 Difference]: Start difference. First operand 89 states and 217 transitions. Second operand 34 states. [2020-11-09 13:31:53,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:31:53,546 INFO L93 Difference]: Finished difference Result 160 states and 393 transitions. [2020-11-09 13:31:53,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-11-09 13:31:53,549 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2020-11-09 13:31:53,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:31:53,550 INFO L225 Difference]: With dead ends: 160 [2020-11-09 13:31:53,550 INFO L226 Difference]: Without dead ends: 155 [2020-11-09 13:31:53,550 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2237 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2581, Invalid=5609, Unknown=0, NotChecked=0, Total=8190 [2020-11-09 13:31:53,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-11-09 13:31:53,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 121. [2020-11-09 13:31:53,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-11-09 13:31:53,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 313 transitions. [2020-11-09 13:31:53,553 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 313 transitions. Word has length 37 [2020-11-09 13:31:53,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:31:53,553 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 313 transitions. [2020-11-09 13:31:53,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-11-09 13:31:53,553 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 313 transitions. [2020-11-09 13:31:53,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-09 13:31:53,554 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:31:53,554 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:31:53,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:31:53,755 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:31:53,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:31:53,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1000859528, now seen corresponding path program 71 times [2020-11-09 13:31:53,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:31:53,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790879993] [2020-11-09 13:31:53,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:31:53,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:31:54,526 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:54,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790879993] [2020-11-09 13:31:54,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153951360] [2020-11-09 13:31:54,526 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:31:54,594 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2020-11-09 13:31:54,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:31:54,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 35 conjunts are in the unsatisfiable core [2020-11-09 13:31:54,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:31:54,598 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:31:54,616 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:54,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:31:54,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2020-11-09 13:31:54,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127172892] [2020-11-09 13:31:54,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-11-09 13:31:54,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:31:54,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-11-09 13:31:54,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=832, Unknown=0, NotChecked=0, Total=1122 [2020-11-09 13:31:54,618 INFO L87 Difference]: Start difference. First operand 121 states and 313 transitions. Second operand 34 states. [2020-11-09 13:31:55,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:31:55,902 INFO L93 Difference]: Finished difference Result 160 states and 391 transitions. [2020-11-09 13:31:55,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-09 13:31:55,903 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 38 [2020-11-09 13:31:55,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:31:55,904 INFO L225 Difference]: With dead ends: 160 [2020-11-09 13:31:55,904 INFO L226 Difference]: Without dead ends: 154 [2020-11-09 13:31:55,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1344, Invalid=2816, Unknown=0, NotChecked=0, Total=4160 [2020-11-09 13:31:55,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-11-09 13:31:55,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 124. [2020-11-09 13:31:55,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-11-09 13:31:55,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 319 transitions. [2020-11-09 13:31:55,909 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 319 transitions. Word has length 38 [2020-11-09 13:31:55,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:31:55,909 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 319 transitions. [2020-11-09 13:31:55,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-11-09 13:31:55,909 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 319 transitions. [2020-11-09 13:31:55,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-09 13:31:55,910 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:31:55,910 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:31:56,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:31:56,121 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:31:56,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:31:56,121 INFO L82 PathProgramCache]: Analyzing trace with hash -2002191990, now seen corresponding path program 72 times [2020-11-09 13:31:56,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:31:56,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234887400] [2020-11-09 13:31:56,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:31:56,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:31:56,722 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:56,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234887400] [2020-11-09 13:31:56,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094196844] [2020-11-09 13:31:56,722 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:31:56,805 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-11-09 13:31:56,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:31:56,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2020-11-09 13:31:56,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:31:56,855 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:31:56,888 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:31:56,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:31:56,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-11-09 13:31:56,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668646603] [2020-11-09 13:31:56,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-11-09 13:31:56,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:31:56,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-11-09 13:31:56,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=909, Unknown=0, NotChecked=0, Total=1190 [2020-11-09 13:31:56,890 INFO L87 Difference]: Start difference. First operand 124 states and 319 transitions. Second operand 35 states. [2020-11-09 13:31:59,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:31:59,650 INFO L93 Difference]: Finished difference Result 193 states and 461 transitions. [2020-11-09 13:31:59,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-11-09 13:31:59,651 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-11-09 13:31:59,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:31:59,652 INFO L225 Difference]: With dead ends: 193 [2020-11-09 13:31:59,652 INFO L226 Difference]: Without dead ends: 188 [2020-11-09 13:31:59,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2680 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2905, Invalid=6215, Unknown=0, NotChecked=0, Total=9120 [2020-11-09 13:31:59,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-11-09 13:31:59,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 93. [2020-11-09 13:31:59,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-11-09 13:31:59,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 227 transitions. [2020-11-09 13:31:59,656 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 227 transitions. Word has length 38 [2020-11-09 13:31:59,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:31:59,657 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 227 transitions. [2020-11-09 13:31:59,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-11-09 13:31:59,657 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 227 transitions. [2020-11-09 13:31:59,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-09 13:31:59,657 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:31:59,657 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:31:59,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:31:59,866 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:31:59,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:31:59,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1609529372, now seen corresponding path program 73 times [2020-11-09 13:31:59,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:31:59,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057854287] [2020-11-09 13:31:59,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:31:59,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:32:00,469 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:32:00,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057854287] [2020-11-09 13:32:00,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181534793] [2020-11-09 13:32:00,469 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:32:00,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:32:00,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2020-11-09 13:32:00,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:32:00,580 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:32:00,612 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:32:00,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:32:00,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-11-09 13:32:00,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438435372] [2020-11-09 13:32:00,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-11-09 13:32:00,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:32:00,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-11-09 13:32:00,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=910, Unknown=0, NotChecked=0, Total=1190 [2020-11-09 13:32:00,614 INFO L87 Difference]: Start difference. First operand 93 states and 227 transitions. Second operand 35 states. [2020-11-09 13:32:03,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:32:03,603 INFO L93 Difference]: Finished difference Result 201 states and 479 transitions. [2020-11-09 13:32:03,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-11-09 13:32:03,604 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-11-09 13:32:03,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:32:03,605 INFO L225 Difference]: With dead ends: 201 [2020-11-09 13:32:03,605 INFO L226 Difference]: Without dead ends: 192 [2020-11-09 13:32:03,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2540 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2822, Invalid=6298, Unknown=0, NotChecked=0, Total=9120 [2020-11-09 13:32:03,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-11-09 13:32:03,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 125. [2020-11-09 13:32:03,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-11-09 13:32:03,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 323 transitions. [2020-11-09 13:32:03,609 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 323 transitions. Word has length 38 [2020-11-09 13:32:03,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:32:03,610 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 323 transitions. [2020-11-09 13:32:03,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-11-09 13:32:03,610 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 323 transitions. [2020-11-09 13:32:03,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-11-09 13:32:03,610 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:32:03,610 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:32:03,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-11-09 13:32:03,822 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:32:03,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:32:03,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1938384331, now seen corresponding path program 74 times [2020-11-09 13:32:03,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:32:03,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096865467] [2020-11-09 13:32:03,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:32:03,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:32:04,451 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:32:04,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096865467] [2020-11-09 13:32:04,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818723889] [2020-11-09 13:32:04,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:32:04,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 13:32:04,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:32:04,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 35 conjunts are in the unsatisfiable core [2020-11-09 13:32:04,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:32:04,565 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:32:04,599 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:32:04,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:32:04,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-11-09 13:32:04,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209496644] [2020-11-09 13:32:04,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-11-09 13:32:04,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:32:04,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-11-09 13:32:04,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=963, Unknown=0, NotChecked=0, Total=1260 [2020-11-09 13:32:04,600 INFO L87 Difference]: Start difference. First operand 125 states and 323 transitions. Second operand 36 states. [2020-11-09 13:32:07,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:32:07,677 INFO L93 Difference]: Finished difference Result 202 states and 481 transitions. [2020-11-09 13:32:07,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-11-09 13:32:07,678 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-11-09 13:32:07,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:32:07,679 INFO L225 Difference]: With dead ends: 202 [2020-11-09 13:32:07,680 INFO L226 Difference]: Without dead ends: 193 [2020-11-09 13:32:07,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2799 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2999, Invalid=6703, Unknown=0, NotChecked=0, Total=9702 [2020-11-09 13:32:07,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-11-09 13:32:07,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 93. [2020-11-09 13:32:07,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-11-09 13:32:07,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 227 transitions. [2020-11-09 13:32:07,683 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 227 transitions. Word has length 39 [2020-11-09 13:32:07,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:32:07,684 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 227 transitions. [2020-11-09 13:32:07,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-11-09 13:32:07,684 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 227 transitions. [2020-11-09 13:32:07,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-11-09 13:32:07,684 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:32:07,684 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:32:07,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:32:07,895 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:32:07,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:32:07,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1644225118, now seen corresponding path program 75 times [2020-11-09 13:32:07,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:32:07,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106623859] [2020-11-09 13:32:07,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:32:07,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:32:08,536 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:32:08,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106623859] [2020-11-09 13:32:08,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123338385] [2020-11-09 13:32:08,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:32:08,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-11-09 13:32:08,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:32:08,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 35 conjunts are in the unsatisfiable core [2020-11-09 13:32:08,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:32:08,659 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:32:08,694 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:32:08,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:32:08,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-11-09 13:32:08,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192443782] [2020-11-09 13:32:08,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-11-09 13:32:08,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:32:08,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-11-09 13:32:08,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=962, Unknown=0, NotChecked=0, Total=1260 [2020-11-09 13:32:08,695 INFO L87 Difference]: Start difference. First operand 93 states and 227 transitions. Second operand 36 states. [2020-11-09 13:32:11,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:32:11,840 INFO L93 Difference]: Finished difference Result 168 states and 413 transitions. [2020-11-09 13:32:11,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-11-09 13:32:11,841 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-11-09 13:32:11,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:32:11,842 INFO L225 Difference]: With dead ends: 168 [2020-11-09 13:32:11,842 INFO L226 Difference]: Without dead ends: 163 [2020-11-09 13:32:11,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2562 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2929, Invalid=6383, Unknown=0, NotChecked=0, Total=9312 [2020-11-09 13:32:11,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-11-09 13:32:11,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 127. [2020-11-09 13:32:11,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-11-09 13:32:11,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 329 transitions. [2020-11-09 13:32:11,846 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 329 transitions. Word has length 39 [2020-11-09 13:32:11,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:32:11,846 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 329 transitions. [2020-11-09 13:32:11,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-11-09 13:32:11,846 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 329 transitions. [2020-11-09 13:32:11,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-11-09 13:32:11,847 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:32:11,847 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:32:12,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-11-09 13:32:12,058 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:32:12,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:32:12,058 INFO L82 PathProgramCache]: Analyzing trace with hash 246674139, now seen corresponding path program 76 times [2020-11-09 13:32:12,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:32:12,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866999297] [2020-11-09 13:32:12,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:32:12,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:32:12,973 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:32:12,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866999297] [2020-11-09 13:32:12,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418267660] [2020-11-09 13:32:12,974 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:32:13,041 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 13:32:13,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:32:13,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 37 conjunts are in the unsatisfiable core [2020-11-09 13:32:13,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:32:13,044 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:32:13,060 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:32:13,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:32:13,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2020-11-09 13:32:13,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311233724] [2020-11-09 13:32:13,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-11-09 13:32:13,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:32:13,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-11-09 13:32:13,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=935, Unknown=0, NotChecked=0, Total=1260 [2020-11-09 13:32:13,062 INFO L87 Difference]: Start difference. First operand 127 states and 329 transitions. Second operand 36 states. [2020-11-09 13:32:14,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:32:14,511 INFO L93 Difference]: Finished difference Result 168 states and 411 transitions. [2020-11-09 13:32:14,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-09 13:32:14,512 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 40 [2020-11-09 13:32:14,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:32:14,514 INFO L225 Difference]: With dead ends: 168 [2020-11-09 13:32:14,514 INFO L226 Difference]: Without dead ends: 162 [2020-11-09 13:32:14,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1513, Invalid=3179, Unknown=0, NotChecked=0, Total=4692 [2020-11-09 13:32:14,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-11-09 13:32:14,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 130. [2020-11-09 13:32:14,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-11-09 13:32:14,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 335 transitions. [2020-11-09 13:32:14,518 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 335 transitions. Word has length 40 [2020-11-09 13:32:14,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:32:14,518 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 335 transitions. [2020-11-09 13:32:14,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-11-09 13:32:14,518 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 335 transitions. [2020-11-09 13:32:14,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-11-09 13:32:14,519 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:32:14,519 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:32:14,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:32:14,730 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:32:14,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:32:14,730 INFO L82 PathProgramCache]: Analyzing trace with hash 39655981, now seen corresponding path program 77 times [2020-11-09 13:32:14,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:32:14,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102989161] [2020-11-09 13:32:14,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:32:14,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:32:15,427 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:32:15,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102989161] [2020-11-09 13:32:15,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360898193] [2020-11-09 13:32:15,428 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:32:15,502 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2020-11-09 13:32:15,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:32:15,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 36 conjunts are in the unsatisfiable core [2020-11-09 13:32:15,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:32:15,561 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:32:15,598 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:32:15,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:32:15,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-11-09 13:32:15,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515465172] [2020-11-09 13:32:15,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-11-09 13:32:15,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:32:15,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-11-09 13:32:15,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=1017, Unknown=0, NotChecked=0, Total=1332 [2020-11-09 13:32:15,600 INFO L87 Difference]: Start difference. First operand 130 states and 335 transitions. Second operand 37 states. [2020-11-09 13:32:18,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:32:18,873 INFO L93 Difference]: Finished difference Result 203 states and 485 transitions. [2020-11-09 13:32:18,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-11-09 13:32:18,874 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 40 [2020-11-09 13:32:18,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:32:18,876 INFO L225 Difference]: With dead ends: 203 [2020-11-09 13:32:18,876 INFO L226 Difference]: Without dead ends: 198 [2020-11-09 13:32:18,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3038 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3274, Invalid=7028, Unknown=0, NotChecked=0, Total=10302 [2020-11-09 13:32:18,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-11-09 13:32:18,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 97. [2020-11-09 13:32:18,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-11-09 13:32:18,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 237 transitions. [2020-11-09 13:32:18,880 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 237 transitions. Word has length 40 [2020-11-09 13:32:18,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:32:18,880 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 237 transitions. [2020-11-09 13:32:18,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-11-09 13:32:18,880 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 237 transitions. [2020-11-09 13:32:18,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-11-09 13:32:18,881 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:32:18,881 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:32:19,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-11-09 13:32:19,092 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:32:19,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:32:19,092 INFO L82 PathProgramCache]: Analyzing trace with hash -568603679, now seen corresponding path program 78 times [2020-11-09 13:32:19,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:32:19,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999624760] [2020-11-09 13:32:19,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:32:19,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:32:19,783 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:32:19,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999624760] [2020-11-09 13:32:19,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135581870] [2020-11-09 13:32:19,783 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:32:19,861 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2020-11-09 13:32:19,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:32:19,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 37 conjunts are in the unsatisfiable core [2020-11-09 13:32:19,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:32:19,955 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:32:19,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:32:19,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-11-09 13:32:19,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189460973] [2020-11-09 13:32:19,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-11-09 13:32:19,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:32:19,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-11-09 13:32:19,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=1018, Unknown=0, NotChecked=0, Total=1332 [2020-11-09 13:32:19,957 INFO L87 Difference]: Start difference. First operand 97 states and 237 transitions. Second operand 37 states. [2020-11-09 13:32:23,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:32:23,106 INFO L93 Difference]: Finished difference Result 211 states and 503 transitions. [2020-11-09 13:32:23,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-11-09 13:32:23,106 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 40 [2020-11-09 13:32:23,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:32:23,108 INFO L225 Difference]: With dead ends: 211 [2020-11-09 13:32:23,108 INFO L226 Difference]: Without dead ends: 202 [2020-11-09 13:32:23,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2615 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2702, Invalid=7198, Unknown=0, NotChecked=0, Total=9900 [2020-11-09 13:32:23,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-11-09 13:32:23,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 131. [2020-11-09 13:32:23,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-11-09 13:32:23,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 339 transitions. [2020-11-09 13:32:23,112 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 339 transitions. Word has length 40 [2020-11-09 13:32:23,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:32:23,112 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 339 transitions. [2020-11-09 13:32:23,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-11-09 13:32:23,112 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 339 transitions. [2020-11-09 13:32:23,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-09 13:32:23,113 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:32:23,113 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:32:23,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:32:23,313 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:32:23,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:32:23,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1229360626, now seen corresponding path program 79 times [2020-11-09 13:32:23,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:32:23,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391405625] [2020-11-09 13:32:23,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:32:23,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:32:24,061 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:32:24,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391405625] [2020-11-09 13:32:24,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331034515] [2020-11-09 13:32:24,062 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:32:24,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:32:24,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 37 conjunts are in the unsatisfiable core [2020-11-09 13:32:24,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:32:24,188 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:32:24,220 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:32:24,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:32:24,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-11-09 13:32:24,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665425648] [2020-11-09 13:32:24,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-11-09 13:32:24,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:32:24,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-11-09 13:32:24,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=1074, Unknown=0, NotChecked=0, Total=1406 [2020-11-09 13:32:24,222 INFO L87 Difference]: Start difference. First operand 131 states and 339 transitions. Second operand 38 states. [2020-11-09 13:32:27,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:32:27,761 INFO L93 Difference]: Finished difference Result 212 states and 505 transitions. [2020-11-09 13:32:27,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-11-09 13:32:27,762 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 41 [2020-11-09 13:32:27,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:32:27,764 INFO L225 Difference]: With dead ends: 212 [2020-11-09 13:32:27,764 INFO L226 Difference]: Without dead ends: 203 [2020-11-09 13:32:27,765 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3164 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3373, Invalid=7547, Unknown=0, NotChecked=0, Total=10920 [2020-11-09 13:32:27,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-11-09 13:32:27,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 97. [2020-11-09 13:32:27,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-11-09 13:32:27,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 237 transitions. [2020-11-09 13:32:27,768 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 237 transitions. Word has length 41 [2020-11-09 13:32:27,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:32:27,768 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 237 transitions. [2020-11-09 13:32:27,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-11-09 13:32:27,768 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 237 transitions. [2020-11-09 13:32:27,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-09 13:32:27,768 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:32:27,768 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:32:27,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:32:27,969 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:32:27,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:32:27,970 INFO L82 PathProgramCache]: Analyzing trace with hash -446816767, now seen corresponding path program 80 times [2020-11-09 13:32:27,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:32:27,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967519102] [2020-11-09 13:32:27,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:32:27,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:32:28,695 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:32:28,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967519102] [2020-11-09 13:32:28,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114322755] [2020-11-09 13:32:28,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:32:28,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 13:32:28,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:32:28,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 37 conjunts are in the unsatisfiable core [2020-11-09 13:32:28,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:32:28,811 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:32:28,852 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:32:28,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:32:28,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-11-09 13:32:28,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806470181] [2020-11-09 13:32:28,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-11-09 13:32:28,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:32:28,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-11-09 13:32:28,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=1073, Unknown=0, NotChecked=0, Total=1406 [2020-11-09 13:32:28,853 INFO L87 Difference]: Start difference. First operand 97 states and 237 transitions. Second operand 38 states. [2020-11-09 13:32:32,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:32:32,348 INFO L93 Difference]: Finished difference Result 176 states and 433 transitions. [2020-11-09 13:32:32,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-11-09 13:32:32,348 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 41 [2020-11-09 13:32:32,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:32:32,350 INFO L225 Difference]: With dead ends: 176 [2020-11-09 13:32:32,350 INFO L226 Difference]: Without dead ends: 171 [2020-11-09 13:32:32,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2909 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3299, Invalid=7207, Unknown=0, NotChecked=0, Total=10506 [2020-11-09 13:32:32,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-11-09 13:32:32,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 133. [2020-11-09 13:32:32,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-11-09 13:32:32,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 345 transitions. [2020-11-09 13:32:32,354 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 345 transitions. Word has length 41 [2020-11-09 13:32:32,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:32:32,354 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 345 transitions. [2020-11-09 13:32:32,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-11-09 13:32:32,354 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 345 transitions. [2020-11-09 13:32:32,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-11-09 13:32:32,354 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:32:32,354 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:32:32,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:32:32,557 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:32:32,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:32:32,557 INFO L82 PathProgramCache]: Analyzing trace with hash 830652542, now seen corresponding path program 81 times [2020-11-09 13:32:32,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:32:32,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413864870] [2020-11-09 13:32:32,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:32:32,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:32:33,529 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:32:33,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413864870] [2020-11-09 13:32:33,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105080673] [2020-11-09 13:32:33,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:32:33,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2020-11-09 13:32:33,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:32:33,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 39 conjunts are in the unsatisfiable core [2020-11-09 13:32:33,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:32:33,615 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:32:33,630 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:32:33,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:32:33,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2020-11-09 13:32:33,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336791709] [2020-11-09 13:32:33,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-11-09 13:32:33,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:32:33,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-11-09 13:32:33,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=1044, Unknown=0, NotChecked=0, Total=1406 [2020-11-09 13:32:33,632 INFO L87 Difference]: Start difference. First operand 133 states and 345 transitions. Second operand 38 states. [2020-11-09 13:32:35,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:32:35,338 INFO L93 Difference]: Finished difference Result 176 states and 431 transitions. [2020-11-09 13:32:35,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-09 13:32:35,339 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 42 [2020-11-09 13:32:35,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:32:35,341 INFO L225 Difference]: With dead ends: 176 [2020-11-09 13:32:35,341 INFO L226 Difference]: Without dead ends: 170 [2020-11-09 13:32:35,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1692, Invalid=3564, Unknown=0, NotChecked=0, Total=5256 [2020-11-09 13:32:35,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-11-09 13:32:35,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 136. [2020-11-09 13:32:35,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-11-09 13:32:35,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 351 transitions. [2020-11-09 13:32:35,345 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 351 transitions. Word has length 42 [2020-11-09 13:32:35,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:32:35,346 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 351 transitions. [2020-11-09 13:32:35,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-11-09 13:32:35,346 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 351 transitions. [2020-11-09 13:32:35,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-11-09 13:32:35,346 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:32:35,346 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:32:35,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:32:35,549 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:32:35,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:32:35,549 INFO L82 PathProgramCache]: Analyzing trace with hash -544498160, now seen corresponding path program 82 times [2020-11-09 13:32:35,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:32:35,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082294547] [2020-11-09 13:32:35,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:32:35,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:32:36,350 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:32:36,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082294547] [2020-11-09 13:32:36,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367574877] [2020-11-09 13:32:36,351 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:32:36,418 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 13:32:36,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:32:36,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 38 conjunts are in the unsatisfiable core [2020-11-09 13:32:36,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:32:36,473 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:32:36,518 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:32:36,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:32:36,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-11-09 13:32:36,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117376508] [2020-11-09 13:32:36,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-11-09 13:32:36,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:32:36,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-11-09 13:32:36,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=1131, Unknown=0, NotChecked=0, Total=1482 [2020-11-09 13:32:36,521 INFO L87 Difference]: Start difference. First operand 136 states and 351 transitions. Second operand 39 states. [2020-11-09 13:32:40,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:32:40,209 INFO L93 Difference]: Finished difference Result 213 states and 509 transitions. [2020-11-09 13:32:40,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-11-09 13:32:40,210 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 42 [2020-11-09 13:32:40,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:32:40,212 INFO L225 Difference]: With dead ends: 213 [2020-11-09 13:32:40,212 INFO L226 Difference]: Without dead ends: 208 [2020-11-09 13:32:40,213 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3418 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3665, Invalid=7891, Unknown=0, NotChecked=0, Total=11556 [2020-11-09 13:32:40,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-11-09 13:32:40,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 101. [2020-11-09 13:32:40,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-11-09 13:32:40,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-11-09 13:32:40,215 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 42 [2020-11-09 13:32:40,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:32:40,215 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-11-09 13:32:40,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-11-09 13:32:40,216 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-11-09 13:32:40,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-11-09 13:32:40,216 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:32:40,216 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:32:40,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:32:40,425 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:32:40,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:32:40,425 INFO L82 PathProgramCache]: Analyzing trace with hash -966392674, now seen corresponding path program 83 times [2020-11-09 13:32:40,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:32:40,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335240069] [2020-11-09 13:32:40,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:32:40,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:32:41,232 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:32:41,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335240069] [2020-11-09 13:32:41,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589130615] [2020-11-09 13:32:41,233 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:32:41,311 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2020-11-09 13:32:41,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:32:41,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 38 conjunts are in the unsatisfiable core [2020-11-09 13:32:41,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:32:41,361 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:32:41,398 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:32:41,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:32:41,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-11-09 13:32:41,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280938595] [2020-11-09 13:32:41,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-11-09 13:32:41,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:32:41,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-11-09 13:32:41,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=1132, Unknown=0, NotChecked=0, Total=1482 [2020-11-09 13:32:41,400 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 39 states. [2020-11-09 13:32:45,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:32:45,425 INFO L93 Difference]: Finished difference Result 221 states and 527 transitions. [2020-11-09 13:32:45,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-11-09 13:32:45,427 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 42 [2020-11-09 13:32:45,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:32:45,428 INFO L225 Difference]: With dead ends: 221 [2020-11-09 13:32:45,429 INFO L226 Difference]: Without dead ends: 212 [2020-11-09 13:32:45,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3254 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3570, Invalid=7986, Unknown=0, NotChecked=0, Total=11556 [2020-11-09 13:32:45,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-11-09 13:32:45,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 137. [2020-11-09 13:32:45,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-11-09 13:32:45,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 355 transitions. [2020-11-09 13:32:45,435 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 355 transitions. Word has length 42 [2020-11-09 13:32:45,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:32:45,435 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 355 transitions. [2020-11-09 13:32:45,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-11-09 13:32:45,436 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 355 transitions. [2020-11-09 13:32:45,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-09 13:32:45,437 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:32:45,437 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:32:45,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:32:45,638 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:32:45,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:32:45,638 INFO L82 PathProgramCache]: Analyzing trace with hash 300451439, now seen corresponding path program 84 times [2020-11-09 13:32:45,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:32:45,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466160420] [2020-11-09 13:32:45,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:32:45,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:32:46,566 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:32:46,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466160420] [2020-11-09 13:32:46,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900478551] [2020-11-09 13:32:46,566 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:32:46,644 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2020-11-09 13:32:46,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:32:46,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 39 conjunts are in the unsatisfiable core [2020-11-09 13:32:46,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:32:46,699 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:32:46,742 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:32:46,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:32:46,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-11-09 13:32:46,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795397780] [2020-11-09 13:32:46,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-11-09 13:32:46,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:32:46,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-11-09 13:32:46,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=1191, Unknown=0, NotChecked=0, Total=1560 [2020-11-09 13:32:46,744 INFO L87 Difference]: Start difference. First operand 137 states and 355 transitions. Second operand 40 states. [2020-11-09 13:32:50,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:32:50,921 INFO L93 Difference]: Finished difference Result 222 states and 529 transitions. [2020-11-09 13:32:50,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-11-09 13:32:50,923 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 43 [2020-11-09 13:32:50,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:32:50,924 INFO L225 Difference]: With dead ends: 222 [2020-11-09 13:32:50,924 INFO L226 Difference]: Without dead ends: 213 [2020-11-09 13:32:50,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3551 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=3769, Invalid=8441, Unknown=0, NotChecked=0, Total=12210 [2020-11-09 13:32:50,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-11-09 13:32:50,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 101. [2020-11-09 13:32:50,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-11-09 13:32:50,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-11-09 13:32:50,929 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 43 [2020-11-09 13:32:50,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:32:50,929 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-11-09 13:32:50,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-11-09 13:32:50,930 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-11-09 13:32:50,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-09 13:32:50,930 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:32:50,930 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:32:51,134 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:32:51,134 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:32:51,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:32:51,135 INFO L82 PathProgramCache]: Analyzing trace with hash 106626276, now seen corresponding path program 85 times [2020-11-09 13:32:51,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:32:51,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540089381] [2020-11-09 13:32:51,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:32:51,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:32:52,093 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:32:52,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540089381] [2020-11-09 13:32:52,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347806712] [2020-11-09 13:32:52,093 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:32:52,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:32:52,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 39 conjunts are in the unsatisfiable core [2020-11-09 13:32:52,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:32:52,218 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:32:52,266 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:32:52,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:32:52,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-11-09 13:32:52,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770667772] [2020-11-09 13:32:52,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-11-09 13:32:52,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:32:52,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-11-09 13:32:52,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=1190, Unknown=0, NotChecked=0, Total=1560 [2020-11-09 13:32:52,268 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 40 states. [2020-11-09 13:32:56,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:32:56,398 INFO L93 Difference]: Finished difference Result 184 states and 453 transitions. [2020-11-09 13:32:56,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-11-09 13:32:56,399 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 43 [2020-11-09 13:32:56,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:32:56,400 INFO L225 Difference]: With dead ends: 184 [2020-11-09 13:32:56,401 INFO L226 Difference]: Without dead ends: 179 [2020-11-09 13:32:56,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3278 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=3691, Invalid=8081, Unknown=0, NotChecked=0, Total=11772 [2020-11-09 13:32:56,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-11-09 13:32:56,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 139. [2020-11-09 13:32:56,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-11-09 13:32:56,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 361 transitions. [2020-11-09 13:32:56,405 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 361 transitions. Word has length 43 [2020-11-09 13:32:56,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:32:56,405 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 361 transitions. [2020-11-09 13:32:56,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-11-09 13:32:56,406 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 361 transitions. [2020-11-09 13:32:56,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-11-09 13:32:56,406 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:32:56,406 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:32:56,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2020-11-09 13:32:56,616 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:32:56,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:32:56,617 INFO L82 PathProgramCache]: Analyzing trace with hash -606817951, now seen corresponding path program 86 times [2020-11-09 13:32:56,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:32:56,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190108369] [2020-11-09 13:32:56,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:32:56,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:32:57,888 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:32:57,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190108369] [2020-11-09 13:32:57,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928491315] [2020-11-09 13:32:57,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:32:57,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 13:32:57,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:32:57,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 41 conjunts are in the unsatisfiable core [2020-11-09 13:32:57,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:32:57,962 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:32:57,982 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:32:57,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:32:57,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2020-11-09 13:32:57,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318527478] [2020-11-09 13:32:57,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-11-09 13:32:57,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:32:57,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-11-09 13:32:57,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=1159, Unknown=0, NotChecked=0, Total=1560 [2020-11-09 13:32:57,984 INFO L87 Difference]: Start difference. First operand 139 states and 361 transitions. Second operand 40 states. [2020-11-09 13:32:59,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:32:59,864 INFO L93 Difference]: Finished difference Result 184 states and 451 transitions. [2020-11-09 13:32:59,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-09 13:32:59,865 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 44 [2020-11-09 13:32:59,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:32:59,867 INFO L225 Difference]: With dead ends: 184 [2020-11-09 13:32:59,867 INFO L226 Difference]: Without dead ends: 178 [2020-11-09 13:32:59,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 972 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1881, Invalid=3971, Unknown=0, NotChecked=0, Total=5852 [2020-11-09 13:32:59,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-11-09 13:32:59,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 142. [2020-11-09 13:32:59,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-11-09 13:32:59,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 367 transitions. [2020-11-09 13:32:59,871 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 367 transitions. Word has length 44 [2020-11-09 13:32:59,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:32:59,871 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 367 transitions. [2020-11-09 13:32:59,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-11-09 13:32:59,871 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 367 transitions. [2020-11-09 13:32:59,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-11-09 13:32:59,872 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:32:59,872 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:33:00,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:33:00,080 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:33:00,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:33:00,081 INFO L82 PathProgramCache]: Analyzing trace with hash 724088115, now seen corresponding path program 87 times [2020-11-09 13:33:00,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:33:00,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390474034] [2020-11-09 13:33:00,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:33:00,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:33:01,027 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:33:01,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390474034] [2020-11-09 13:33:01,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387841726] [2020-11-09 13:33:01,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:33:01,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2020-11-09 13:33:01,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:33:01,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 40 conjunts are in the unsatisfiable core [2020-11-09 13:33:01,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:33:01,180 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:33:01,233 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:33:01,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:33:01,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-11-09 13:33:01,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082711709] [2020-11-09 13:33:01,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-11-09 13:33:01,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:33:01,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-11-09 13:33:01,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=389, Invalid=1251, Unknown=0, NotChecked=0, Total=1640 [2020-11-09 13:33:01,235 INFO L87 Difference]: Start difference. First operand 142 states and 367 transitions. Second operand 41 states. [2020-11-09 13:33:05,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:33:05,670 INFO L93 Difference]: Finished difference Result 223 states and 533 transitions. [2020-11-09 13:33:05,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-11-09 13:33:05,671 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 44 [2020-11-09 13:33:05,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:33:05,672 INFO L225 Difference]: With dead ends: 223 [2020-11-09 13:33:05,672 INFO L226 Difference]: Without dead ends: 218 [2020-11-09 13:33:05,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3820 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=4078, Invalid=8804, Unknown=0, NotChecked=0, Total=12882 [2020-11-09 13:33:05,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-11-09 13:33:05,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 105. [2020-11-09 13:33:05,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-11-09 13:33:05,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 257 transitions. [2020-11-09 13:33:05,675 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 257 transitions. Word has length 44 [2020-11-09 13:33:05,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:33:05,675 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 257 transitions. [2020-11-09 13:33:05,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-11-09 13:33:05,676 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 257 transitions. [2020-11-09 13:33:05,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-11-09 13:33:05,676 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:33:05,676 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:33:05,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-11-09 13:33:05,884 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:33:05,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:33:05,884 INFO L82 PathProgramCache]: Analyzing trace with hash -989527525, now seen corresponding path program 88 times [2020-11-09 13:33:05,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:33:05,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482324321] [2020-11-09 13:33:05,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:33:05,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:33:06,808 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:33:06,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482324321] [2020-11-09 13:33:06,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281261085] [2020-11-09 13:33:06,808 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:33:06,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 13:33:06,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:33:06,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 40 conjunts are in the unsatisfiable core [2020-11-09 13:33:06,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:33:06,938 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:33:06,972 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:33:06,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:33:06,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-11-09 13:33:06,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811012035] [2020-11-09 13:33:06,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-11-09 13:33:06,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:33:06,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-11-09 13:33:06,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=388, Invalid=1252, Unknown=0, NotChecked=0, Total=1640 [2020-11-09 13:33:06,974 INFO L87 Difference]: Start difference. First operand 105 states and 257 transitions. Second operand 41 states. [2020-11-09 13:33:11,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:33:11,576 INFO L93 Difference]: Finished difference Result 231 states and 551 transitions. [2020-11-09 13:33:11,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-11-09 13:33:11,577 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 44 [2020-11-09 13:33:11,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:33:11,578 INFO L225 Difference]: With dead ends: 231 [2020-11-09 13:33:11,578 INFO L226 Difference]: Without dead ends: 222 [2020-11-09 13:33:11,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3644 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=3977, Invalid=8905, Unknown=0, NotChecked=0, Total=12882 [2020-11-09 13:33:11,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-11-09 13:33:11,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 143. [2020-11-09 13:33:11,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-11-09 13:33:11,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 371 transitions. [2020-11-09 13:33:11,583 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 371 transitions. Word has length 44 [2020-11-09 13:33:11,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:33:11,583 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 371 transitions. [2020-11-09 13:33:11,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-11-09 13:33:11,583 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 371 transitions. [2020-11-09 13:33:11,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-11-09 13:33:11,583 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:33:11,583 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:33:11,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:33:11,784 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:33:11,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:33:11,785 INFO L82 PathProgramCache]: Analyzing trace with hash 971920300, now seen corresponding path program 89 times [2020-11-09 13:33:11,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:33:11,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481133283] [2020-11-09 13:33:11,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:33:11,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:33:12,786 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:33:12,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481133283] [2020-11-09 13:33:12,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841167318] [2020-11-09 13:33:12,787 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:33:12,869 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2020-11-09 13:33:12,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:33:12,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 41 conjunts are in the unsatisfiable core [2020-11-09 13:33:12,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:33:12,936 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:33:12,981 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:33:12,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:33:12,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-11-09 13:33:12,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808030163] [2020-11-09 13:33:12,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-11-09 13:33:12,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:33:12,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-11-09 13:33:12,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=1314, Unknown=0, NotChecked=0, Total=1722 [2020-11-09 13:33:12,983 INFO L87 Difference]: Start difference. First operand 143 states and 371 transitions. Second operand 42 states. [2020-11-09 13:33:17,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:33:17,713 INFO L93 Difference]: Finished difference Result 232 states and 553 transitions. [2020-11-09 13:33:17,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-11-09 13:33:17,715 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 45 [2020-11-09 13:33:17,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:33:17,716 INFO L225 Difference]: With dead ends: 232 [2020-11-09 13:33:17,717 INFO L226 Difference]: Without dead ends: 223 [2020-11-09 13:33:17,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3960 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=4187, Invalid=9385, Unknown=0, NotChecked=0, Total=13572 [2020-11-09 13:33:17,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-11-09 13:33:17,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 105. [2020-11-09 13:33:17,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-11-09 13:33:17,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 257 transitions. [2020-11-09 13:33:17,721 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 257 transitions. Word has length 45 [2020-11-09 13:33:17,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:33:17,721 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 257 transitions. [2020-11-09 13:33:17,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-11-09 13:33:17,721 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 257 transitions. [2020-11-09 13:33:17,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-11-09 13:33:17,722 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:33:17,722 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:33:17,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:33:17,934 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:33:17,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:33:17,934 INFO L82 PathProgramCache]: Analyzing trace with hash -610554105, now seen corresponding path program 90 times [2020-11-09 13:33:17,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:33:17,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106638322] [2020-11-09 13:33:17,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:33:17,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:33:18,936 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:33:18,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106638322] [2020-11-09 13:33:18,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561444456] [2020-11-09 13:33:18,937 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:33:19,025 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-11-09 13:33:19,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:33:19,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 41 conjunts are in the unsatisfiable core [2020-11-09 13:33:19,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:33:19,091 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:33:19,155 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:33:19,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:33:19,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-11-09 13:33:19,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803351767] [2020-11-09 13:33:19,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-11-09 13:33:19,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:33:19,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-11-09 13:33:19,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=1313, Unknown=0, NotChecked=0, Total=1722 [2020-11-09 13:33:19,157 INFO L87 Difference]: Start difference. First operand 105 states and 257 transitions. Second operand 42 states. [2020-11-09 13:33:23,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:33:23,870 INFO L93 Difference]: Finished difference Result 192 states and 473 transitions. [2020-11-09 13:33:23,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-11-09 13:33:23,871 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 45 [2020-11-09 13:33:23,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:33:23,872 INFO L225 Difference]: With dead ends: 192 [2020-11-09 13:33:23,872 INFO L226 Difference]: Without dead ends: 187 [2020-11-09 13:33:23,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3669 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=4105, Invalid=9005, Unknown=0, NotChecked=0, Total=13110 [2020-11-09 13:33:23,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-11-09 13:33:23,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 145. [2020-11-09 13:33:23,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-11-09 13:33:23,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 377 transitions. [2020-11-09 13:33:23,876 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 377 transitions. Word has length 45 [2020-11-09 13:33:23,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:33:23,877 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 377 transitions. [2020-11-09 13:33:23,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-11-09 13:33:23,877 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 377 transitions. [2020-11-09 13:33:23,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-09 13:33:23,877 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:33:23,877 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:33:24,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:33:24,078 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:33:24,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:33:24,078 INFO L82 PathProgramCache]: Analyzing trace with hash 963507588, now seen corresponding path program 91 times [2020-11-09 13:33:24,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:33:24,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119890539] [2020-11-09 13:33:24,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:33:24,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:33:25,442 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:33:25,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119890539] [2020-11-09 13:33:25,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477206694] [2020-11-09 13:33:25,442 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:33:25,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:33:25,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 43 conjunts are in the unsatisfiable core [2020-11-09 13:33:25,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:33:25,524 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:33:25,543 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:33:25,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:33:25,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2020-11-09 13:33:25,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260987096] [2020-11-09 13:33:25,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-11-09 13:33:25,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:33:25,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-11-09 13:33:25,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=1280, Unknown=0, NotChecked=0, Total=1722 [2020-11-09 13:33:25,545 INFO L87 Difference]: Start difference. First operand 145 states and 377 transitions. Second operand 42 states. [2020-11-09 13:33:27,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:33:27,768 INFO L93 Difference]: Finished difference Result 192 states and 471 transitions. [2020-11-09 13:33:27,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-09 13:33:27,769 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 46 [2020-11-09 13:33:27,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:33:27,770 INFO L225 Difference]: With dead ends: 192 [2020-11-09 13:33:27,770 INFO L226 Difference]: Without dead ends: 186 [2020-11-09 13:33:27,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2080, Invalid=4400, Unknown=0, NotChecked=0, Total=6480 [2020-11-09 13:33:27,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-11-09 13:33:27,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 148. [2020-11-09 13:33:27,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-11-09 13:33:27,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 383 transitions. [2020-11-09 13:33:27,775 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 383 transitions. Word has length 46 [2020-11-09 13:33:27,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:33:27,775 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 383 transitions. [2020-11-09 13:33:27,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-11-09 13:33:27,775 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 383 transitions. [2020-11-09 13:33:27,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-09 13:33:27,775 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:33:27,776 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:33:27,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:33:27,987 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:33:27,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:33:27,987 INFO L82 PathProgramCache]: Analyzing trace with hash 64786326, now seen corresponding path program 92 times [2020-11-09 13:33:27,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:33:27,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51005279] [2020-11-09 13:33:27,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:33:28,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:33:29,107 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:33:29,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51005279] [2020-11-09 13:33:29,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351458535] [2020-11-09 13:33:29,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:33:29,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 13:33:29,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:33:29,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 42 conjunts are in the unsatisfiable core [2020-11-09 13:33:29,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:33:29,240 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:33:29,290 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:33:29,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:33:29,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-11-09 13:33:29,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006561022] [2020-11-09 13:33:29,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-11-09 13:33:29,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:33:29,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-11-09 13:33:29,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=429, Invalid=1377, Unknown=0, NotChecked=0, Total=1806 [2020-11-09 13:33:29,292 INFO L87 Difference]: Start difference. First operand 148 states and 383 transitions. Second operand 43 states. [2020-11-09 13:33:34,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:33:34,183 INFO L93 Difference]: Finished difference Result 233 states and 557 transitions. [2020-11-09 13:33:34,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-11-09 13:33:34,184 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 46 [2020-11-09 13:33:34,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:33:34,186 INFO L225 Difference]: With dead ends: 233 [2020-11-09 13:33:34,186 INFO L226 Difference]: Without dead ends: 228 [2020-11-09 13:33:34,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4244 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=4513, Invalid=9767, Unknown=0, NotChecked=0, Total=14280 [2020-11-09 13:33:34,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-11-09 13:33:34,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 109. [2020-11-09 13:33:34,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-11-09 13:33:34,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 267 transitions. [2020-11-09 13:33:34,190 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 267 transitions. Word has length 46 [2020-11-09 13:33:34,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:33:34,190 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 267 transitions. [2020-11-09 13:33:34,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-11-09 13:33:34,190 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 267 transitions. [2020-11-09 13:33:34,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-09 13:33:34,190 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:33:34,190 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:33:34,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:33:34,391 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:33:34,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:33:34,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1747282856, now seen corresponding path program 93 times [2020-11-09 13:33:34,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:33:34,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377366565] [2020-11-09 13:33:34,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:33:34,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:33:35,507 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:33:35,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377366565] [2020-11-09 13:33:35,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757035882] [2020-11-09 13:33:35,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:33:35,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2020-11-09 13:33:35,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:33:35,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 42 conjunts are in the unsatisfiable core [2020-11-09 13:33:35,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:33:35,655 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:33:35,699 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:33:35,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:33:35,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-11-09 13:33:35,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742590545] [2020-11-09 13:33:35,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-11-09 13:33:35,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:33:35,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-11-09 13:33:35,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=1378, Unknown=0, NotChecked=0, Total=1806 [2020-11-09 13:33:35,701 INFO L87 Difference]: Start difference. First operand 109 states and 267 transitions. Second operand 43 states. [2020-11-09 13:33:40,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:33:40,919 INFO L93 Difference]: Finished difference Result 241 states and 575 transitions. [2020-11-09 13:33:40,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-11-09 13:33:40,920 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 46 [2020-11-09 13:33:40,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:33:40,922 INFO L225 Difference]: With dead ends: 241 [2020-11-09 13:33:40,922 INFO L226 Difference]: Without dead ends: 232 [2020-11-09 13:33:40,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4056 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=4406, Invalid=9874, Unknown=0, NotChecked=0, Total=14280 [2020-11-09 13:33:40,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-11-09 13:33:40,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 149. [2020-11-09 13:33:40,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-11-09 13:33:40,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 387 transitions. [2020-11-09 13:33:40,926 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 387 transitions. Word has length 46 [2020-11-09 13:33:40,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:33:40,926 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 387 transitions. [2020-11-09 13:33:40,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-11-09 13:33:40,926 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 387 transitions. [2020-11-09 13:33:40,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-11-09 13:33:40,927 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:33:40,927 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:33:41,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:33:41,127 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:33:41,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:33:41,128 INFO L82 PathProgramCache]: Analyzing trace with hash 2008401321, now seen corresponding path program 94 times [2020-11-09 13:33:41,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:33:41,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66523391] [2020-11-09 13:33:41,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:33:41,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:33:42,319 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:33:42,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66523391] [2020-11-09 13:33:42,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335193969] [2020-11-09 13:33:42,320 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:33:42,391 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 13:33:42,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:33:42,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 43 conjunts are in the unsatisfiable core [2020-11-09 13:33:42,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:33:42,455 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:33:42,501 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:33:42,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:33:42,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-11-09 13:33:42,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828379669] [2020-11-09 13:33:42,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-11-09 13:33:42,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:33:42,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-11-09 13:33:42,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=449, Invalid=1443, Unknown=0, NotChecked=0, Total=1892 [2020-11-09 13:33:42,502 INFO L87 Difference]: Start difference. First operand 149 states and 387 transitions. Second operand 44 states. [2020-11-09 13:33:48,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:33:48,169 INFO L93 Difference]: Finished difference Result 242 states and 577 transitions. [2020-11-09 13:33:48,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2020-11-09 13:33:48,171 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 47 [2020-11-09 13:33:48,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:33:48,172 INFO L225 Difference]: With dead ends: 242 [2020-11-09 13:33:48,172 INFO L226 Difference]: Without dead ends: 233 [2020-11-09 13:33:48,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4391 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=4627, Invalid=10379, Unknown=0, NotChecked=0, Total=15006 [2020-11-09 13:33:48,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-11-09 13:33:48,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 109. [2020-11-09 13:33:48,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-11-09 13:33:48,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 267 transitions. [2020-11-09 13:33:48,176 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 267 transitions. Word has length 47 [2020-11-09 13:33:48,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:33:48,176 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 267 transitions. [2020-11-09 13:33:48,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-11-09 13:33:48,177 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 267 transitions. [2020-11-09 13:33:48,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-11-09 13:33:48,177 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:33:48,177 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:33:48,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2020-11-09 13:33:48,393 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:33:48,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:33:48,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1668834410, now seen corresponding path program 95 times [2020-11-09 13:33:48,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:33:48,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71769496] [2020-11-09 13:33:48,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:33:48,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:33:49,566 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:33:49,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71769496] [2020-11-09 13:33:49,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593115666] [2020-11-09 13:33:49,567 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-11-09 13:33:49,647 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2020-11-09 13:33:49,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:33:49,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 43 conjunts are in the unsatisfiable core [2020-11-09 13:33:49,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:33:49,709 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:33:49,764 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:33:49,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:33:49,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-11-09 13:33:49,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486060026] [2020-11-09 13:33:49,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-11-09 13:33:49,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:33:49,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-11-09 13:33:49,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=1442, Unknown=0, NotChecked=0, Total=1892 [2020-11-09 13:33:49,766 INFO L87 Difference]: Start difference. First operand 109 states and 267 transitions. Second operand 44 states. [2020-11-09 13:33:55,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:33:55,189 INFO L93 Difference]: Finished difference Result 200 states and 493 transitions. [2020-11-09 13:33:55,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-11-09 13:33:55,191 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 47 [2020-11-09 13:33:55,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:33:55,193 INFO L225 Difference]: With dead ends: 200 [2020-11-09 13:33:55,193 INFO L226 Difference]: Without dead ends: 195 [2020-11-09 13:33:55,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4082 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=4541, Invalid=9979, Unknown=0, NotChecked=0, Total=14520 [2020-11-09 13:33:55,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-11-09 13:33:55,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 151. [2020-11-09 13:33:55,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-11-09 13:33:55,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 393 transitions. [2020-11-09 13:33:55,197 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 393 transitions. Word has length 47 [2020-11-09 13:33:55,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:33:55,198 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 393 transitions. [2020-11-09 13:33:55,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-11-09 13:33:55,198 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 393 transitions. [2020-11-09 13:33:55,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-09 13:33:55,198 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:33:55,198 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:33:55,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:33:55,408 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:33:55,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:33:55,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1782137625, now seen corresponding path program 96 times [2020-11-09 13:33:55,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:33:55,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576492140] [2020-11-09 13:33:55,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:33:55,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-09 13:33:55,430 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-09 13:33:55,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-09 13:33:55,496 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-09 13:33:55,544 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-09 13:33:55,544 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-09 13:33:55,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2020-11-09 13:33:55,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.11 01:33:55 BasicIcfg [2020-11-09 13:33:55,689 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-09 13:33:55,691 INFO L168 Benchmark]: Toolchain (without parser) took 236954.20 ms. Allocated memory was 151.0 MB in the beginning and 331.4 MB in the end (delta: 180.4 MB). Free memory was 124.4 MB in the beginning and 159.4 MB in the end (delta: -35.0 MB). Peak memory consumption was 146.1 MB. Max. memory is 8.0 GB. [2020-11-09 13:33:55,691 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 151.0 MB. Free memory was 123.5 MB in the beginning and 123.0 MB in the end (delta: 436.7 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-09 13:33:55,692 INFO L168 Benchmark]: CACSL2BoogieTranslator took 758.44 ms. Allocated memory is still 151.0 MB. Free memory was 123.8 MB in the beginning and 130.2 MB in the end (delta: -6.4 MB). Peak memory consumption was 32.7 MB. Max. memory is 8.0 GB. [2020-11-09 13:33:55,692 INFO L168 Benchmark]: Boogie Procedure Inliner took 82.01 ms. Allocated memory is still 151.0 MB. Free memory was 130.2 MB in the beginning and 128.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-09 13:33:55,692 INFO L168 Benchmark]: Boogie Preprocessor took 60.02 ms. Allocated memory is still 151.0 MB. Free memory was 128.7 MB in the beginning and 127.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-09 13:33:55,694 INFO L168 Benchmark]: RCFGBuilder took 577.69 ms. Allocated memory is still 151.0 MB. Free memory was 127.1 MB in the beginning and 107.2 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. [2020-11-09 13:33:55,694 INFO L168 Benchmark]: TraceAbstraction took 235452.71 ms. Allocated memory was 151.0 MB in the beginning and 331.4 MB in the end (delta: 180.4 MB). Free memory was 106.6 MB in the beginning and 159.4 MB in the end (delta: -52.7 MB). Peak memory consumption was 128.1 MB. Max. memory is 8.0 GB. [2020-11-09 13:33:55,696 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 151.0 MB. Free memory was 123.5 MB in the beginning and 123.0 MB in the end (delta: 436.7 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 758.44 ms. Allocated memory is still 151.0 MB. Free memory was 123.8 MB in the beginning and 130.2 MB in the end (delta: -6.4 MB). Peak memory consumption was 32.7 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 82.01 ms. Allocated memory is still 151.0 MB. Free memory was 130.2 MB in the beginning and 128.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 60.02 ms. Allocated memory is still 151.0 MB. Free memory was 128.7 MB in the beginning and 127.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 577.69 ms. Allocated memory is still 151.0 MB. Free memory was 127.1 MB in the beginning and 107.2 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 235452.71 ms. Allocated memory was 151.0 MB in the beginning and 331.4 MB in the end (delta: 180.4 MB). Free memory was 106.6 MB in the beginning and 159.4 MB in the end (delta: -52.7 MB). Peak memory consumption was 128.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 637 VarBasedMoverChecksPositive, 12 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 15 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 5.1s, 65 PlacesBefore, 20 PlacesAfterwards, 64 TransitionsBefore, 16 TransitionsAfterwards, 1144 CoEnabledTransitionPairs, 7 FixpointIterations, 16 TrivialSequentialCompositions, 32 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 11 ConcurrentYvCompositions, 3 ChoiceCompositions, 62 TotalNumberOfCompositions, 1187 MoverChecksTotal - CounterExampleResult [Line: 685]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L686] 0 int i = 3, j = 6; [L704] 0 pthread_t id1, id2; [L705] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L706] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, i=3, j=6] [L708] 0 int condI = i >= (2*20 +6); VAL [arg={0:0}, arg={0:0}, i=3, j=6] [L696] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L688] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=1] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=2, k=1] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=3] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=4, k=3] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=5, k=4] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=6, k=5] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=6] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=6, k=7] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=7] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=8, k=7] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=8] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=8, k=9] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=9] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=10, k=9] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=10, k=10] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=27, j=26, k=11, k=10] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=27, j=28, k=11, k=11] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=29, j=28, k=11, k=12] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=29, j=30, k=12, k=12] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=31, j=30, k=13, k=12] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=31, j=32, k=13, k=13] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=33, j=32, k=13, k=14] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=33, j=34, k=14, k=14] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=35, j=34, k=14, k=15] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=35, j=36, k=15, k=15] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=37, j=36, k=15, k=16] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=37, j=38, k=16, k=16] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=39, j=38, k=16, k=17] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=39, j=40, k=17, k=17] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=41, j=40, k=17, k=18] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=41, j=42, k=18, k=18] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=43, j=42, k=19, k=18] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=43, j=44, k=19, k=19] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=45, j=44, k=20, k=19] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=45, j=46, k=20, k=20] [L711] 0 int condJ = j >= (2*20 +6); [L713] COND TRUE 0 condI || condJ [L685] COND FALSE 0 !(0) [L685] 0 __assert_fail ("0", "triangular-longest-2.c", 8, __extension__ __PRETTY_FUNCTION__) VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=45, j=46, k=20, k=20] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 59 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 235.1s, OverallIterations: 98, TraceHistogramMax: 20, AutomataDifference: 158.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.1s, HoareTripleCheckerStatistics: 1537 SDtfs, 9419 SDslu, 11401 SDs, 0 SdLazy, 13701 SolverSat, 9976 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 18.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8254 GetRequests, 2428 SyntacticMatches, 74 SemanticMatches, 5752 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123166 ImplicationChecksByTransitivity, 168.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=151occurred in iteration=97, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 97 MinimizatonAttempts, 4342 StatesRemovedByMinimization, 96 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.1s SsaConstructionTime, 3.5s SatisfiabilityAnalysisTime, 43.5s InterpolantComputationTime, 5428 NumberOfCodeBlocks, 5428 NumberOfCodeBlocksAsserted, 669 NumberOfCheckSat, 5191 ConstructedInterpolants, 0 QuantifiedInterpolants, 662283 SizeOfPredicates, 1950 NumberOfNonLiveVariables, 16836 ConjunctsInSsa, 2330 ConjunctsInUnsatCore, 189 InterpolantComputations, 5 PerfectInterpolantSequences, 0/23560 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 incorrect! Received shutdown request...