/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c7e336b [2020-10-05 22:17:08,879 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-05 22:17:08,882 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-05 22:17:08,908 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-05 22:17:08,909 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-05 22:17:08,910 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-05 22:17:08,911 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-05 22:17:08,913 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-05 22:17:08,914 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-05 22:17:08,915 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-05 22:17:08,916 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-05 22:17:08,917 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-05 22:17:08,918 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-05 22:17:08,919 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-05 22:17:08,920 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-05 22:17:08,921 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-05 22:17:08,922 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-05 22:17:08,923 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-05 22:17:08,925 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-05 22:17:08,927 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-05 22:17:08,928 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-05 22:17:08,929 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-05 22:17:08,931 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-05 22:17:08,931 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-05 22:17:08,934 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-05 22:17:08,952 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-05 22:17:08,953 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-05 22:17:08,954 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-05 22:17:08,958 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-05 22:17:09,000 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-05 22:17:09,000 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-05 22:17:09,001 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-05 22:17:09,001 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-05 22:17:09,002 INFO L138 SettingsManager]: * Use SBE=true [2020-10-05 22:17:09,002 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-05 22:17:09,002 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-05 22:17:09,003 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-05 22:17:09,003 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-05 22:17:09,003 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-05 22:17:09,004 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-05 22:17:09,004 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-05 22:17:09,004 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-05 22:17:09,005 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-05 22:17:09,005 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-05 22:17:09,005 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-05 22:17:09,005 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-05 22:17:09,005 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-05 22:17:09,006 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-05 22:17:09,006 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-05 22:17:09,006 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-05 22:17:09,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-05 22:17:09,006 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-05 22:17:09,007 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-05 22:17:09,007 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-05 22:17:09,007 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-05 22:17:09,007 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-05 22:17:09,007 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-05 22:17:09,007 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-05 22:17:09,008 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-05 22:17:09,301 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-05 22:17:09,311 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-05 22:17:09,315 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-05 22:17:09,316 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-05 22:17:09,319 INFO L275 PluginConnector]: CDTParser initialized [2020-10-05 22:17:09,320 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench-1.i [2020-10-05 22:17:09,380 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ce43eccd/e431fe2e2c6b40d2b4439600eb05ea05/FLAG870c12040 [2020-10-05 22:17:10,106 INFO L306 CDTParser]: Found 1 translation units. [2020-10-05 22:17:10,107 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench-1.i [2020-10-05 22:17:10,117 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ce43eccd/e431fe2e2c6b40d2b4439600eb05ea05/FLAG870c12040 [2020-10-05 22:17:10,371 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ce43eccd/e431fe2e2c6b40d2b4439600eb05ea05 [2020-10-05 22:17:10,382 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-05 22:17:10,384 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-05 22:17:10,385 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-05 22:17:10,385 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-05 22:17:10,388 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-05 22:17:10,389 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.10 10:17:10" (1/1) ... [2020-10-05 22:17:10,392 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a2ec795 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:17:10, skipping insertion in model container [2020-10-05 22:17:10,392 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.10 10:17:10" (1/1) ... [2020-10-05 22:17:10,400 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-05 22:17:10,461 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-05 22:17:10,959 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-05 22:17:10,973 INFO L203 MainTranslator]: Completed pre-run [2020-10-05 22:17:11,046 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-05 22:17:11,116 INFO L208 MainTranslator]: Completed translation [2020-10-05 22:17:11,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:17:11 WrapperNode [2020-10-05 22:17:11,117 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-05 22:17:11,117 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-05 22:17:11,118 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-05 22:17:11,118 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-05 22:17:11,126 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:17:11" (1/1) ... [2020-10-05 22:17:11,142 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:17:11" (1/1) ... [2020-10-05 22:17:11,161 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-05 22:17:11,162 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-05 22:17:11,162 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-05 22:17:11,162 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-05 22:17:11,171 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:17:11" (1/1) ... [2020-10-05 22:17:11,171 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:17:11" (1/1) ... [2020-10-05 22:17:11,174 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:17:11" (1/1) ... [2020-10-05 22:17:11,174 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:17:11" (1/1) ... [2020-10-05 22:17:11,180 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:17:11" (1/1) ... [2020-10-05 22:17:11,187 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:17:11" (1/1) ... [2020-10-05 22:17:11,192 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:17:11" (1/1) ... [2020-10-05 22:17:11,195 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-05 22:17:11,196 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-05 22:17:11,196 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-05 22:17:11,196 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-05 22:17:11,197 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:17:11" (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 [2020-10-05 22:17:11,260 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-05 22:17:11,260 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-05 22:17:11,260 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-05 22:17:11,260 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-05 22:17:11,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-05 22:17:11,260 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-05 22:17:11,261 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-05 22:17:11,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-05 22:17:11,261 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-05 22:17:11,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-05 22:17:11,261 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-05 22:17:11,263 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-05 22:17:11,552 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-05 22:17:11,552 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-05 22:17:11,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.10 10:17:11 BoogieIcfgContainer [2020-10-05 22:17:11,556 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-05 22:17:11,558 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-05 22:17:11,558 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-05 22:17:11,563 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-05 22:17:11,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.10 10:17:10" (1/3) ... [2020-10-05 22:17:11,565 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c11c8ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.10 10:17:11, skipping insertion in model container [2020-10-05 22:17:11,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:17:11" (2/3) ... [2020-10-05 22:17:11,565 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c11c8ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.10 10:17:11, skipping insertion in model container [2020-10-05 22:17:11,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.10 10:17:11" (3/3) ... [2020-10-05 22:17:11,568 INFO L109 eAbstractionObserver]: Analyzing ICFG fib_bench-1.i [2020-10-05 22:17:11,582 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-05 22:17:11,583 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-05 22:17:11,592 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-05 22:17:11,594 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-05 22:17:11,626 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,626 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,627 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,627 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,627 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,628 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,628 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,629 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,629 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,629 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,630 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,630 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,630 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,631 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,631 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,631 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,632 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,632 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,632 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,633 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,633 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,633 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,633 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,634 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,634 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,635 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,635 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,635 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,635 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,636 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,639 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,640 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,640 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,640 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,641 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,641 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,647 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,648 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,648 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,648 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,648 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,649 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:17:11,669 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-05 22:17:11,692 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-05 22:17:11,693 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-05 22:17:11,693 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-05 22:17:11,693 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-05 22:17:11,693 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-05 22:17:11,693 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-05 22:17:11,694 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-05 22:17:11,694 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-05 22:17:11,710 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 59 places, 57 transitions, 124 flow [2020-10-05 22:17:11,712 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-10-05 22:17:11,754 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-10-05 22:17:11,754 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-05 22:17:11,760 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 55 events. 5/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-10-05 22:17:11,763 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-10-05 22:17:11,788 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-10-05 22:17:11,789 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-05 22:17:11,790 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 55 events. 5/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-10-05 22:17:11,792 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 1032 [2020-10-05 22:17:11,793 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-10-05 22:17:12,851 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-10-05 22:17:12,960 INFO L206 etLargeBlockEncoding]: Checked pairs total: 879 [2020-10-05 22:17:12,961 INFO L214 etLargeBlockEncoding]: Total number of compositions: 48 [2020-10-05 22:17:12,965 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-10-05 22:17:12,981 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-05 22:17:12,983 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-05 22:17:12,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-05 22:17:12,999 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:13,000 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-05 22:17:13,000 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:13,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:13,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1506398721, now seen corresponding path program 1 times [2020-10-05 22:17:13,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:13,013 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677826353] [2020-10-05 22:17:13,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:13,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:13,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:13,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677826353] [2020-10-05 22:17:13,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 22:17:13,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-05 22:17:13,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810924128] [2020-10-05 22:17:13,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-05 22:17:13,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:13,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-05 22:17:13,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-05 22:17:13,274 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-05 22:17:13,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:13,349 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-10-05 22:17:13,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-05 22:17:13,351 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-05 22:17:13,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:13,364 INFO L225 Difference]: With dead ends: 83 [2020-10-05 22:17:13,364 INFO L226 Difference]: Without dead ends: 54 [2020-10-05 22:17:13,366 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-05 22:17:13,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-05 22:17:13,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-10-05 22:17:13,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-05 22:17:13,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-10-05 22:17:13,411 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-10-05 22:17:13,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:13,412 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-10-05 22:17:13,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-05 22:17:13,412 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-10-05 22:17:13,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-05 22:17:13,413 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:13,414 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:13,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-05 22:17:13,414 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:13,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:13,415 INFO L82 PathProgramCache]: Analyzing trace with hash 235327157, now seen corresponding path program 1 times [2020-10-05 22:17:13,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:13,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191614068] [2020-10-05 22:17:13,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:13,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:13,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:13,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191614068] [2020-10-05 22:17:13,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 22:17:13,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-05 22:17:13,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159215118] [2020-10-05 22:17:13,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-05 22:17:13,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:13,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-05 22:17:13,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-05 22:17:13,510 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 5 states. [2020-10-05 22:17:13,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:13,564 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2020-10-05 22:17:13,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-05 22:17:13,564 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-05 22:17:13,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:13,566 INFO L225 Difference]: With dead ends: 80 [2020-10-05 22:17:13,567 INFO L226 Difference]: Without dead ends: 75 [2020-10-05 22:17:13,567 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-05 22:17:13,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-05 22:17:13,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-10-05 22:17:13,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-05 22:17:13,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-10-05 22:17:13,578 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2020-10-05 22:17:13,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:13,579 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-10-05 22:17:13,579 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-05 22:17:13,579 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-10-05 22:17:13,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-05 22:17:13,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:13,580 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:13,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-05 22:17:13,581 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:13,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:13,581 INFO L82 PathProgramCache]: Analyzing trace with hash -244746376, now seen corresponding path program 1 times [2020-10-05 22:17:13,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:13,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201964147] [2020-10-05 22:17:13,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:13,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:13,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:13,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201964147] [2020-10-05 22:17:13,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 22:17:13,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-05 22:17:13,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175727422] [2020-10-05 22:17:13,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-05 22:17:13,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:13,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-05 22:17:13,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-05 22:17:13,658 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 5 states. [2020-10-05 22:17:13,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:13,688 INFO L93 Difference]: Finished difference Result 73 states and 170 transitions. [2020-10-05 22:17:13,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-05 22:17:13,689 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-05 22:17:13,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:13,690 INFO L225 Difference]: With dead ends: 73 [2020-10-05 22:17:13,690 INFO L226 Difference]: Without dead ends: 70 [2020-10-05 22:17:13,691 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-05 22:17:13,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-05 22:17:13,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-10-05 22:17:13,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-05 22:17:13,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 152 transitions. [2020-10-05 22:17:13,700 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 152 transitions. Word has length 8 [2020-10-05 22:17:13,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:13,701 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 152 transitions. [2020-10-05 22:17:13,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-05 22:17:13,701 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 152 transitions. [2020-10-05 22:17:13,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-05 22:17:13,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:13,702 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:13,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-05 22:17:13,703 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:13,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:13,703 INFO L82 PathProgramCache]: Analyzing trace with hash -244724056, now seen corresponding path program 2 times [2020-10-05 22:17:13,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:13,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915939432] [2020-10-05 22:17:13,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:13,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:13,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:13,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915939432] [2020-10-05 22:17:13,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 22:17:13,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-05 22:17:13,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367921308] [2020-10-05 22:17:13,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-05 22:17:13,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:13,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-05 22:17:13,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-05 22:17:13,765 INFO L87 Difference]: Start difference. First operand 64 states and 152 transitions. Second operand 5 states. [2020-10-05 22:17:13,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:13,823 INFO L93 Difference]: Finished difference Result 86 states and 202 transitions. [2020-10-05 22:17:13,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-05 22:17:13,823 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-05 22:17:13,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:13,825 INFO L225 Difference]: With dead ends: 86 [2020-10-05 22:17:13,825 INFO L226 Difference]: Without dead ends: 80 [2020-10-05 22:17:13,825 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-05 22:17:13,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-05 22:17:13,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-10-05 22:17:13,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-05 22:17:13,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-10-05 22:17:13,835 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-10-05 22:17:13,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:13,835 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-10-05 22:17:13,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-05 22:17:13,835 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-10-05 22:17:13,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-05 22:17:13,836 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:13,837 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:13,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-05 22:17:13,837 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:13,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:13,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1294770680, now seen corresponding path program 2 times [2020-10-05 22:17:13,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:13,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031466470] [2020-10-05 22:17:13,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:13,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:13,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:13,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031466470] [2020-10-05 22:17:13,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284849895] [2020-10-05 22:17:13,943 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 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 [2020-10-05 22:17:13,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:17:13,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:14,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-05 22:17:14,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:14,077 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:17:14,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:14,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:14,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-10-05 22:17:14,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038458286] [2020-10-05 22:17:14,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-05 22:17:14,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:14,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-05 22:17:14,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-05 22:17:14,103 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 10 states. [2020-10-05 22:17:14,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:14,176 INFO L93 Difference]: Finished difference Result 101 states and 235 transitions. [2020-10-05 22:17:14,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-05 22:17:14,176 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2020-10-05 22:17:14,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:14,178 INFO L225 Difference]: With dead ends: 101 [2020-10-05 22:17:14,178 INFO L226 Difference]: Without dead ends: 96 [2020-10-05 22:17:14,178 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:14,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-05 22:17:14,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2020-10-05 22:17:14,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-05 22:17:14,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 173 transitions. [2020-10-05 22:17:14,187 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 173 transitions. Word has length 9 [2020-10-05 22:17:14,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:14,187 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 173 transitions. [2020-10-05 22:17:14,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-05 22:17:14,187 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 173 transitions. [2020-10-05 22:17:14,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-05 22:17:14,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:14,189 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:14,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:14,395 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:14,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:14,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1002797622, now seen corresponding path program 3 times [2020-10-05 22:17:14,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:14,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613644833] [2020-10-05 22:17:14,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:14,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:14,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:14,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613644833] [2020-10-05 22:17:14,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456568115] [2020-10-05 22:17:14,466 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 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 [2020-10-05 22:17:14,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-05 22:17:14,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:14,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-05 22:17:14,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:14,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:14,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:14,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-05 22:17:14,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965946638] [2020-10-05 22:17:14,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-05 22:17:14,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:14,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-05 22:17:14,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-05 22:17:14,607 INFO L87 Difference]: Start difference. First operand 71 states and 173 transitions. Second operand 9 states. [2020-10-05 22:17:14,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:14,647 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-10-05 22:17:14,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-05 22:17:14,648 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-05 22:17:14,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:14,649 INFO L225 Difference]: With dead ends: 84 [2020-10-05 22:17:14,649 INFO L226 Difference]: Without dead ends: 81 [2020-10-05 22:17:14,650 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-05 22:17:14,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-05 22:17:14,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2020-10-05 22:17:14,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-05 22:17:14,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 179 transitions. [2020-10-05 22:17:14,657 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 179 transitions. Word has length 9 [2020-10-05 22:17:14,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:14,658 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 179 transitions. [2020-10-05 22:17:14,658 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-05 22:17:14,658 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 179 transitions. [2020-10-05 22:17:14,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-05 22:17:14,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:14,659 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:14,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:14,873 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:14,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:14,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1003489542, now seen corresponding path program 4 times [2020-10-05 22:17:14,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:14,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132442702] [2020-10-05 22:17:14,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:14,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:14,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:14,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132442702] [2020-10-05 22:17:14,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310537313] [2020-10-05 22:17:14,953 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 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 [2020-10-05 22:17:14,996 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:17:14,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:14,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-05 22:17:14,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:15,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:15,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:15,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-05 22:17:15,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946456191] [2020-10-05 22:17:15,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-05 22:17:15,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:15,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-05 22:17:15,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-05 22:17:15,065 INFO L87 Difference]: Start difference. First operand 74 states and 179 transitions. Second operand 9 states. [2020-10-05 22:17:15,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:15,113 INFO L93 Difference]: Finished difference Result 90 states and 213 transitions. [2020-10-05 22:17:15,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-05 22:17:15,114 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-05 22:17:15,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:15,115 INFO L225 Difference]: With dead ends: 90 [2020-10-05 22:17:15,115 INFO L226 Difference]: Without dead ends: 87 [2020-10-05 22:17:15,116 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-05 22:17:15,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-05 22:17:15,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 76. [2020-10-05 22:17:15,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-05 22:17:15,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 186 transitions. [2020-10-05 22:17:15,123 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 186 transitions. Word has length 9 [2020-10-05 22:17:15,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:15,124 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 186 transitions. [2020-10-05 22:17:15,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-05 22:17:15,124 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 186 transitions. [2020-10-05 22:17:15,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-05 22:17:15,125 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:15,125 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:15,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:15,339 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:15,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:15,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1003511862, now seen corresponding path program 5 times [2020-10-05 22:17:15,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:15,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191381137] [2020-10-05 22:17:15,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:15,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:15,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:15,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191381137] [2020-10-05 22:17:15,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169587916] [2020-10-05 22:17:15,410 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 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 [2020-10-05 22:17:15,465 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:17:15,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:15,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-05 22:17:15,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:15,520 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:17:15,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:15,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:15,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-05 22:17:15,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639634994] [2020-10-05 22:17:15,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-05 22:17:15,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:15,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-05 22:17:15,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-05 22:17:15,541 INFO L87 Difference]: Start difference. First operand 76 states and 186 transitions. Second operand 9 states. [2020-10-05 22:17:15,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:15,641 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-10-05 22:17:15,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-05 22:17:15,642 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-05 22:17:15,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:15,643 INFO L225 Difference]: With dead ends: 99 [2020-10-05 22:17:15,643 INFO L226 Difference]: Without dead ends: 93 [2020-10-05 22:17:15,643 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-10-05 22:17:15,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-05 22:17:15,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 77. [2020-10-05 22:17:15,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-05 22:17:15,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 190 transitions. [2020-10-05 22:17:15,650 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 190 transitions. Word has length 9 [2020-10-05 22:17:15,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:15,651 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 190 transitions. [2020-10-05 22:17:15,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-05 22:17:15,651 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 190 transitions. [2020-10-05 22:17:15,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-05 22:17:15,652 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:15,652 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:15,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:15,868 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:15,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:15,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1491235988, now seen corresponding path program 1 times [2020-10-05 22:17:15,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:15,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279824666] [2020-10-05 22:17:15,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:15,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:15,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:15,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279824666] [2020-10-05 22:17:15,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 22:17:15,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-05 22:17:15,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908656553] [2020-10-05 22:17:15,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-05 22:17:15,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:15,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-05 22:17:15,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-05 22:17:15,925 INFO L87 Difference]: Start difference. First operand 77 states and 190 transitions. Second operand 6 states. [2020-10-05 22:17:15,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:15,951 INFO L93 Difference]: Finished difference Result 92 states and 220 transitions. [2020-10-05 22:17:15,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-05 22:17:15,951 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-05 22:17:15,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:15,952 INFO L225 Difference]: With dead ends: 92 [2020-10-05 22:17:15,952 INFO L226 Difference]: Without dead ends: 90 [2020-10-05 22:17:15,953 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-05 22:17:15,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-05 22:17:15,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 79. [2020-10-05 22:17:15,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-05 22:17:15,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 194 transitions. [2020-10-05 22:17:15,959 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 194 transitions. Word has length 10 [2020-10-05 22:17:15,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:15,959 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 194 transitions. [2020-10-05 22:17:15,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-05 22:17:15,959 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 194 transitions. [2020-10-05 22:17:15,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-05 22:17:15,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:15,973 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:15,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-05 22:17:15,974 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:15,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:15,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1490572898, now seen corresponding path program 2 times [2020-10-05 22:17:15,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:15,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213052599] [2020-10-05 22:17:15,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:15,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:16,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:16,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213052599] [2020-10-05 22:17:16,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 22:17:16,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-05 22:17:16,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151523925] [2020-10-05 22:17:16,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-05 22:17:16,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:16,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-05 22:17:16,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-05 22:17:16,044 INFO L87 Difference]: Start difference. First operand 79 states and 194 transitions. Second operand 6 states. [2020-10-05 22:17:16,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:16,093 INFO L93 Difference]: Finished difference Result 100 states and 234 transitions. [2020-10-05 22:17:16,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-05 22:17:16,094 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-05 22:17:16,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:16,095 INFO L225 Difference]: With dead ends: 100 [2020-10-05 22:17:16,096 INFO L226 Difference]: Without dead ends: 98 [2020-10-05 22:17:16,096 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-05 22:17:16,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-05 22:17:16,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 83. [2020-10-05 22:17:16,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-05 22:17:16,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 200 transitions. [2020-10-05 22:17:16,102 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 200 transitions. Word has length 10 [2020-10-05 22:17:16,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:16,102 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 200 transitions. [2020-10-05 22:17:16,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-05 22:17:16,102 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 200 transitions. [2020-10-05 22:17:16,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-05 22:17:16,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:16,104 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:16,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-05 22:17:16,104 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:16,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:16,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1490550578, now seen corresponding path program 3 times [2020-10-05 22:17:16,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:16,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303614136] [2020-10-05 22:17:16,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:16,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:16,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:16,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303614136] [2020-10-05 22:17:16,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 22:17:16,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-05 22:17:16,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057336860] [2020-10-05 22:17:16,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-05 22:17:16,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:16,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-05 22:17:16,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-05 22:17:16,159 INFO L87 Difference]: Start difference. First operand 83 states and 200 transitions. Second operand 6 states. [2020-10-05 22:17:16,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:16,228 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-10-05 22:17:16,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-05 22:17:16,232 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-05 22:17:16,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:16,233 INFO L225 Difference]: With dead ends: 105 [2020-10-05 22:17:16,233 INFO L226 Difference]: Without dead ends: 100 [2020-10-05 22:17:16,234 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-05 22:17:16,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-05 22:17:16,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-10-05 22:17:16,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-05 22:17:16,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 198 transitions. [2020-10-05 22:17:16,239 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 198 transitions. Word has length 10 [2020-10-05 22:17:16,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:16,239 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 198 transitions. [2020-10-05 22:17:16,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-05 22:17:16,239 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 198 transitions. [2020-10-05 22:17:16,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-05 22:17:16,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:16,240 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:16,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-05 22:17:16,241 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:16,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:16,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1490521748, now seen corresponding path program 4 times [2020-10-05 22:17:16,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:16,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485422633] [2020-10-05 22:17:16,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:16,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:16,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:16,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485422633] [2020-10-05 22:17:16,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 22:17:16,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-05 22:17:16,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570588478] [2020-10-05 22:17:16,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-05 22:17:16,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:16,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-05 22:17:16,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-05 22:17:16,297 INFO L87 Difference]: Start difference. First operand 82 states and 198 transitions. Second operand 6 states. [2020-10-05 22:17:16,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:16,371 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-10-05 22:17:16,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-05 22:17:16,371 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-05 22:17:16,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:16,372 INFO L225 Difference]: With dead ends: 105 [2020-10-05 22:17:16,372 INFO L226 Difference]: Without dead ends: 100 [2020-10-05 22:17:16,373 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-05 22:17:16,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-05 22:17:16,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-10-05 22:17:16,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-05 22:17:16,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 194 transitions. [2020-10-05 22:17:16,377 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 194 transitions. Word has length 10 [2020-10-05 22:17:16,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:16,378 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 194 transitions. [2020-10-05 22:17:16,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-05 22:17:16,378 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 194 transitions. [2020-10-05 22:17:16,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-05 22:17:16,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:16,379 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:16,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-05 22:17:16,380 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:16,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:16,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1483163371, now seen corresponding path program 3 times [2020-10-05 22:17:16,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:16,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896782556] [2020-10-05 22:17:16,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:16,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:16,463 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:16,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896782556] [2020-10-05 22:17:16,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618291766] [2020-10-05 22:17:16,464 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 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 [2020-10-05 22:17:16,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-05 22:17:16,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:16,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 22:17:16,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:16,649 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:17:16,672 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:16,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:16,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-10-05 22:17:16,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520554524] [2020-10-05 22:17:16,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-05 22:17:16,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:16,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-05 22:17:16,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-10-05 22:17:16,675 INFO L87 Difference]: Start difference. First operand 82 states and 194 transitions. Second operand 12 states. [2020-10-05 22:17:16,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:16,762 INFO L93 Difference]: Finished difference Result 122 states and 284 transitions. [2020-10-05 22:17:16,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-05 22:17:16,762 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2020-10-05 22:17:16,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:16,764 INFO L225 Difference]: With dead ends: 122 [2020-10-05 22:17:16,764 INFO L226 Difference]: Without dead ends: 117 [2020-10-05 22:17:16,765 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-05 22:17:16,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-05 22:17:16,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 88. [2020-10-05 22:17:16,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-05 22:17:16,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 215 transitions. [2020-10-05 22:17:16,769 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 215 transitions. Word has length 10 [2020-10-05 22:17:16,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:16,770 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 215 transitions. [2020-10-05 22:17:16,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-05 22:17:16,770 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 215 transitions. [2020-10-05 22:17:16,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-05 22:17:16,773 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:16,773 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:16,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-05 22:17:16,986 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:16,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:16,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1021955896, now seen corresponding path program 6 times [2020-10-05 22:17:16,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:16,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505210382] [2020-10-05 22:17:16,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:16,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:17,062 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:17,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505210382] [2020-10-05 22:17:17,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476114569] [2020-10-05 22:17:17,063 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 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 [2020-10-05 22:17:17,123 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-05 22:17:17,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:17,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 22:17:17,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:17,235 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:17,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:17,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-05 22:17:17,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410092075] [2020-10-05 22:17:17,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 22:17:17,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:17,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 22:17:17,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-05 22:17:17,238 INFO L87 Difference]: Start difference. First operand 88 states and 215 transitions. Second operand 11 states. [2020-10-05 22:17:17,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:17,293 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-10-05 22:17:17,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-05 22:17:17,294 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-05 22:17:17,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:17,295 INFO L225 Difference]: With dead ends: 108 [2020-10-05 22:17:17,295 INFO L226 Difference]: Without dead ends: 105 [2020-10-05 22:17:17,296 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-05 22:17:17,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-05 22:17:17,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 91. [2020-10-05 22:17:17,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-05 22:17:17,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 221 transitions. [2020-10-05 22:17:17,301 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 221 transitions. Word has length 10 [2020-10-05 22:17:17,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:17,302 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 221 transitions. [2020-10-05 22:17:17,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 22:17:17,302 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 221 transitions. [2020-10-05 22:17:17,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-05 22:17:17,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:17,303 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:17,503 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:17,504 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:17,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:17,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1043405416, now seen corresponding path program 7 times [2020-10-05 22:17:17,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:17,505 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407893871] [2020-10-05 22:17:17,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:17,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:17,579 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:17,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407893871] [2020-10-05 22:17:17,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99286979] [2020-10-05 22:17:17,580 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 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 [2020-10-05 22:17:17,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:17,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 22:17:17,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:17,726 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:17,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:17,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-05 22:17:17,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327483585] [2020-10-05 22:17:17,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 22:17:17,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:17,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 22:17:17,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-05 22:17:17,729 INFO L87 Difference]: Start difference. First operand 91 states and 221 transitions. Second operand 11 states. [2020-10-05 22:17:17,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:17,795 INFO L93 Difference]: Finished difference Result 116 states and 270 transitions. [2020-10-05 22:17:17,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-05 22:17:17,796 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-05 22:17:17,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:17,797 INFO L225 Difference]: With dead ends: 116 [2020-10-05 22:17:17,797 INFO L226 Difference]: Without dead ends: 113 [2020-10-05 22:17:17,798 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-10-05 22:17:17,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-05 22:17:17,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 92. [2020-10-05 22:17:17,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-05 22:17:17,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 223 transitions. [2020-10-05 22:17:17,802 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 223 transitions. Word has length 10 [2020-10-05 22:17:17,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:17,803 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 223 transitions. [2020-10-05 22:17:17,803 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 22:17:17,803 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 223 transitions. [2020-10-05 22:17:17,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-05 22:17:17,803 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:17,803 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:18,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-05 22:17:18,015 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:18,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:18,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1044097336, now seen corresponding path program 8 times [2020-10-05 22:17:18,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:18,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733077751] [2020-10-05 22:17:18,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:18,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:18,094 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:18,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733077751] [2020-10-05 22:17:18,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241755665] [2020-10-05 22:17:18,095 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 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 [2020-10-05 22:17:18,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:17:18,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:18,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 22:17:18,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:18,223 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:18,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:18,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-05 22:17:18,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352930799] [2020-10-05 22:17:18,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 22:17:18,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:18,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 22:17:18,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-05 22:17:18,225 INFO L87 Difference]: Start difference. First operand 92 states and 223 transitions. Second operand 11 states. [2020-10-05 22:17:18,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:18,301 INFO L93 Difference]: Finished difference Result 115 states and 270 transitions. [2020-10-05 22:17:18,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-05 22:17:18,301 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-05 22:17:18,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:18,303 INFO L225 Difference]: With dead ends: 115 [2020-10-05 22:17:18,303 INFO L226 Difference]: Without dead ends: 112 [2020-10-05 22:17:18,303 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:18,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-05 22:17:18,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 94. [2020-10-05 22:17:18,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-05 22:17:18,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 230 transitions. [2020-10-05 22:17:18,308 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 230 transitions. Word has length 10 [2020-10-05 22:17:18,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:18,308 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 230 transitions. [2020-10-05 22:17:18,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 22:17:18,309 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 230 transitions. [2020-10-05 22:17:18,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-05 22:17:18,309 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:18,309 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:18,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-05 22:17:18,520 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:18,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:18,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1044119656, now seen corresponding path program 9 times [2020-10-05 22:17:18,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:18,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23622120] [2020-10-05 22:17:18,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:18,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:18,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:18,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23622120] [2020-10-05 22:17:18,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046411493] [2020-10-05 22:17:18,573 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 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 [2020-10-05 22:17:18,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-05 22:17:18,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:18,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 22:17:18,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:18,691 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:17:18,703 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:18,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:18,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-05 22:17:18,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380749265] [2020-10-05 22:17:18,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 22:17:18,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:18,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 22:17:18,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-05 22:17:18,705 INFO L87 Difference]: Start difference. First operand 94 states and 230 transitions. Second operand 11 states. [2020-10-05 22:17:18,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:18,817 INFO L93 Difference]: Finished difference Result 124 states and 294 transitions. [2020-10-05 22:17:18,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-05 22:17:18,818 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-05 22:17:18,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:18,819 INFO L225 Difference]: With dead ends: 124 [2020-10-05 22:17:18,819 INFO L226 Difference]: Without dead ends: 118 [2020-10-05 22:17:18,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:17:18,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-05 22:17:18,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94. [2020-10-05 22:17:18,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-05 22:17:18,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-10-05 22:17:18,824 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 10 [2020-10-05 22:17:18,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:18,824 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-10-05 22:17:18,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 22:17:18,824 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-10-05 22:17:18,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-05 22:17:18,825 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:18,825 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:19,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-05 22:17:19,036 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:19,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:19,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1016324353, now seen corresponding path program 5 times [2020-10-05 22:17:19,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:19,037 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404409659] [2020-10-05 22:17:19,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:19,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:19,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:19,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404409659] [2020-10-05 22:17:19,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062707392] [2020-10-05 22:17:19,125 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 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 [2020-10-05 22:17:19,178 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:17:19,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:19,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 22:17:19,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:19,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:19,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:19,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-05 22:17:19,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337694414] [2020-10-05 22:17:19,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 22:17:19,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:19,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 22:17:19,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-05 22:17:19,257 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 11 states. [2020-10-05 22:17:19,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:19,302 INFO L93 Difference]: Finished difference Result 113 states and 270 transitions. [2020-10-05 22:17:19,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-05 22:17:19,302 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-05 22:17:19,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:19,303 INFO L225 Difference]: With dead ends: 113 [2020-10-05 22:17:19,303 INFO L226 Difference]: Without dead ends: 111 [2020-10-05 22:17:19,304 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-05 22:17:19,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-05 22:17:19,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 96. [2020-10-05 22:17:19,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-05 22:17:19,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 238 transitions. [2020-10-05 22:17:19,308 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 238 transitions. Word has length 11 [2020-10-05 22:17:19,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:19,308 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 238 transitions. [2020-10-05 22:17:19,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 22:17:19,309 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 238 transitions. [2020-10-05 22:17:19,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-05 22:17:19,309 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:19,309 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:19,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-05 22:17:19,522 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:19,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:19,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1016325314, now seen corresponding path program 6 times [2020-10-05 22:17:19,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:19,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567931488] [2020-10-05 22:17:19,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:19,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:19,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:19,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567931488] [2020-10-05 22:17:19,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229154051] [2020-10-05 22:17:19,593 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 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 [2020-10-05 22:17:19,631 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-05 22:17:19,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:19,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 22:17:19,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:19,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:19,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:19,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-05 22:17:19,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293924182] [2020-10-05 22:17:19,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 22:17:19,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:19,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 22:17:19,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-05 22:17:19,717 INFO L87 Difference]: Start difference. First operand 96 states and 238 transitions. Second operand 11 states. [2020-10-05 22:17:19,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:19,793 INFO L93 Difference]: Finished difference Result 118 states and 280 transitions. [2020-10-05 22:17:19,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-05 22:17:19,794 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-05 22:17:19,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:19,795 INFO L225 Difference]: With dead ends: 118 [2020-10-05 22:17:19,795 INFO L226 Difference]: Without dead ends: 116 [2020-10-05 22:17:19,795 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:19,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-05 22:17:19,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 97. [2020-10-05 22:17:19,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-05 22:17:19,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 239 transitions. [2020-10-05 22:17:19,799 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 239 transitions. Word has length 11 [2020-10-05 22:17:19,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:19,800 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 239 transitions. [2020-10-05 22:17:19,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 22:17:19,800 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 239 transitions. [2020-10-05 22:17:19,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-05 22:17:19,801 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:19,801 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:20,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:20,012 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:20,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:20,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1016354144, now seen corresponding path program 7 times [2020-10-05 22:17:20,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:20,013 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759075474] [2020-10-05 22:17:20,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:20,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:20,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:20,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759075474] [2020-10-05 22:17:20,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629875952] [2020-10-05 22:17:20,079 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 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 [2020-10-05 22:17:20,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:20,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 22:17:20,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:20,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:20,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:20,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-05 22:17:20,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058033679] [2020-10-05 22:17:20,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 22:17:20,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:20,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 22:17:20,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-05 22:17:20,223 INFO L87 Difference]: Start difference. First operand 97 states and 239 transitions. Second operand 11 states. [2020-10-05 22:17:20,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:20,295 INFO L93 Difference]: Finished difference Result 119 states and 282 transitions. [2020-10-05 22:17:20,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-05 22:17:20,295 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-05 22:17:20,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:20,296 INFO L225 Difference]: With dead ends: 119 [2020-10-05 22:17:20,296 INFO L226 Difference]: Without dead ends: 117 [2020-10-05 22:17:20,297 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:20,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-05 22:17:20,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 98. [2020-10-05 22:17:20,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-05 22:17:20,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 241 transitions. [2020-10-05 22:17:20,301 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 241 transitions. Word has length 11 [2020-10-05 22:17:20,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:20,301 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 241 transitions. [2020-10-05 22:17:20,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 22:17:20,301 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 241 transitions. [2020-10-05 22:17:20,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-05 22:17:20,302 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:20,302 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:20,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:20,503 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:20,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:20,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1036880143, now seen corresponding path program 8 times [2020-10-05 22:17:20,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:20,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996883285] [2020-10-05 22:17:20,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:20,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:20,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:20,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996883285] [2020-10-05 22:17:20,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469180313] [2020-10-05 22:17:20,573 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 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 [2020-10-05 22:17:20,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:17:20,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:20,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 22:17:20,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:20,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:20,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:20,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-05 22:17:20,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154244969] [2020-10-05 22:17:20,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 22:17:20,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:20,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 22:17:20,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-05 22:17:20,723 INFO L87 Difference]: Start difference. First operand 98 states and 241 transitions. Second operand 11 states. [2020-10-05 22:17:20,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:20,789 INFO L93 Difference]: Finished difference Result 122 states and 288 transitions. [2020-10-05 22:17:20,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-05 22:17:20,790 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-05 22:17:20,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:20,792 INFO L225 Difference]: With dead ends: 122 [2020-10-05 22:17:20,792 INFO L226 Difference]: Without dead ends: 120 [2020-10-05 22:17:20,793 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-10-05 22:17:20,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-05 22:17:20,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 100. [2020-10-05 22:17:20,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-05 22:17:20,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 247 transitions. [2020-10-05 22:17:20,799 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 247 transitions. Word has length 11 [2020-10-05 22:17:20,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:20,800 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 247 transitions. [2020-10-05 22:17:20,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 22:17:20,800 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 247 transitions. [2020-10-05 22:17:20,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-05 22:17:20,801 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:20,801 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:21,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-10-05 22:17:21,002 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:21,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:21,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1036881104, now seen corresponding path program 9 times [2020-10-05 22:17:21,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:21,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550797291] [2020-10-05 22:17:21,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:21,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:21,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:21,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550797291] [2020-10-05 22:17:21,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899123238] [2020-10-05 22:17:21,061 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 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 [2020-10-05 22:17:21,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-05 22:17:21,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:21,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 22:17:21,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:21,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:21,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:21,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-05 22:17:21,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636024916] [2020-10-05 22:17:21,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 22:17:21,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:21,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 22:17:21,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-05 22:17:21,184 INFO L87 Difference]: Start difference. First operand 100 states and 247 transitions. Second operand 11 states. [2020-10-05 22:17:21,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:21,264 INFO L93 Difference]: Finished difference Result 123 states and 290 transitions. [2020-10-05 22:17:21,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-05 22:17:21,265 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-05 22:17:21,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:21,266 INFO L225 Difference]: With dead ends: 123 [2020-10-05 22:17:21,266 INFO L226 Difference]: Without dead ends: 121 [2020-10-05 22:17:21,266 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-05 22:17:21,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-05 22:17:21,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 99. [2020-10-05 22:17:21,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-05 22:17:21,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 243 transitions. [2020-10-05 22:17:21,270 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 243 transitions. Word has length 11 [2020-10-05 22:17:21,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:21,270 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 243 transitions. [2020-10-05 22:17:21,271 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 22:17:21,271 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 243 transitions. [2020-10-05 22:17:21,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-05 22:17:21,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:21,271 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:21,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:21,482 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:21,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:21,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1037543233, now seen corresponding path program 10 times [2020-10-05 22:17:21,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:21,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660621506] [2020-10-05 22:17:21,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:21,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:21,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:21,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660621506] [2020-10-05 22:17:21,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708729433] [2020-10-05 22:17:21,541 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 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 [2020-10-05 22:17:21,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:17:21,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:21,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 22:17:21,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:21,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:21,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:21,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-05 22:17:21,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792419747] [2020-10-05 22:17:21,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 22:17:21,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:21,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 22:17:21,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-05 22:17:21,666 INFO L87 Difference]: Start difference. First operand 99 states and 243 transitions. Second operand 11 states. [2020-10-05 22:17:21,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:21,744 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-10-05 22:17:21,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-05 22:17:21,745 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-05 22:17:21,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:21,746 INFO L225 Difference]: With dead ends: 123 [2020-10-05 22:17:21,746 INFO L226 Difference]: Without dead ends: 121 [2020-10-05 22:17:21,746 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:21,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-05 22:17:21,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 103. [2020-10-05 22:17:21,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-05 22:17:21,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 249 transitions. [2020-10-05 22:17:21,750 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 249 transitions. Word has length 11 [2020-10-05 22:17:21,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:21,751 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 249 transitions. [2020-10-05 22:17:21,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 22:17:21,751 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 249 transitions. [2020-10-05 22:17:21,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-05 22:17:21,752 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:21,752 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:21,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-05 22:17:21,953 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:21,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:21,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1037565553, now seen corresponding path program 11 times [2020-10-05 22:17:21,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:21,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530582032] [2020-10-05 22:17:21,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:21,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:22,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:22,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530582032] [2020-10-05 22:17:22,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782334849] [2020-10-05 22:17:22,009 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 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 [2020-10-05 22:17:22,057 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:17:22,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:22,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 22:17:22,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:22,139 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:17:22,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:22,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:22,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-05 22:17:22,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145782301] [2020-10-05 22:17:22,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 22:17:22,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:22,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 22:17:22,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-05 22:17:22,177 INFO L87 Difference]: Start difference. First operand 103 states and 249 transitions. Second operand 11 states. [2020-10-05 22:17:22,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:22,360 INFO L93 Difference]: Finished difference Result 133 states and 314 transitions. [2020-10-05 22:17:22,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-05 22:17:22,361 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-05 22:17:22,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:22,362 INFO L225 Difference]: With dead ends: 133 [2020-10-05 22:17:22,363 INFO L226 Difference]: Without dead ends: 128 [2020-10-05 22:17:22,363 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:17:22,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-05 22:17:22,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2020-10-05 22:17:22,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-05 22:17:22,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 247 transitions. [2020-10-05 22:17:22,367 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 247 transitions. Word has length 11 [2020-10-05 22:17:22,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:22,367 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 247 transitions. [2020-10-05 22:17:22,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 22:17:22,367 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 247 transitions. [2020-10-05 22:17:22,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-05 22:17:22,368 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:22,368 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:22,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:22,579 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:22,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:22,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1037573024, now seen corresponding path program 12 times [2020-10-05 22:17:22,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:22,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974925110] [2020-10-05 22:17:22,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:22,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:22,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:22,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974925110] [2020-10-05 22:17:22,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099366250] [2020-10-05 22:17:22,628 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 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 [2020-10-05 22:17:22,666 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-05 22:17:22,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:22,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 22:17:22,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:22,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:22,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:22,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-05 22:17:22,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878168730] [2020-10-05 22:17:22,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 22:17:22,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:22,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 22:17:22,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-05 22:17:22,732 INFO L87 Difference]: Start difference. First operand 102 states and 247 transitions. Second operand 11 states. [2020-10-05 22:17:22,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:22,828 INFO L93 Difference]: Finished difference Result 127 states and 298 transitions. [2020-10-05 22:17:22,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-05 22:17:22,829 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-05 22:17:22,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:22,830 INFO L225 Difference]: With dead ends: 127 [2020-10-05 22:17:22,830 INFO L226 Difference]: Without dead ends: 125 [2020-10-05 22:17:22,830 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:17:22,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-05 22:17:22,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 104. [2020-10-05 22:17:22,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-05 22:17:22,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-10-05 22:17:22,835 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-10-05 22:17:22,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:22,835 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-10-05 22:17:22,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 22:17:22,835 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-10-05 22:17:22,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-05 22:17:22,836 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:22,836 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:23,045 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-05 22:17:23,046 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:23,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:23,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1037594383, now seen corresponding path program 13 times [2020-10-05 22:17:23,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:23,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760780806] [2020-10-05 22:17:23,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:23,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:23,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:23,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760780806] [2020-10-05 22:17:23,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131630771] [2020-10-05 22:17:23,111 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 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 [2020-10-05 22:17:23,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:23,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 22:17:23,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:23,205 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:17:23,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:23,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:23,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-05 22:17:23,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146670837] [2020-10-05 22:17:23,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 22:17:23,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:23,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 22:17:23,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-05 22:17:23,218 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-10-05 22:17:23,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:23,431 INFO L93 Difference]: Finished difference Result 141 states and 334 transitions. [2020-10-05 22:17:23,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-05 22:17:23,431 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-05 22:17:23,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:23,433 INFO L225 Difference]: With dead ends: 141 [2020-10-05 22:17:23,433 INFO L226 Difference]: Without dead ends: 136 [2020-10-05 22:17:23,433 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-10-05 22:17:23,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-05 22:17:23,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 104. [2020-10-05 22:17:23,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-05 22:17:23,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-10-05 22:17:23,438 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-10-05 22:17:23,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:23,438 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-10-05 22:17:23,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 22:17:23,438 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-10-05 22:17:23,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-05 22:17:23,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:23,439 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:23,647 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-05 22:17:23,648 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:23,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:23,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1037595344, now seen corresponding path program 14 times [2020-10-05 22:17:23,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:23,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829941247] [2020-10-05 22:17:23,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:23,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:23,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:23,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829941247] [2020-10-05 22:17:23,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492355680] [2020-10-05 22:17:23,702 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 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 [2020-10-05 22:17:23,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:17:23,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:23,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 22:17:23,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:23,800 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:17:23,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:23,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:23,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-05 22:17:23,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239566357] [2020-10-05 22:17:23,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 22:17:23,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:23,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 22:17:23,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-05 22:17:23,812 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-10-05 22:17:23,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:23,978 INFO L93 Difference]: Finished difference Result 136 states and 319 transitions. [2020-10-05 22:17:23,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-05 22:17:23,979 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-05 22:17:23,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:23,980 INFO L225 Difference]: With dead ends: 136 [2020-10-05 22:17:23,980 INFO L226 Difference]: Without dead ends: 131 [2020-10-05 22:17:23,980 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:17:23,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-05 22:17:23,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2020-10-05 22:17:23,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-05 22:17:23,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 245 transitions. [2020-10-05 22:17:23,984 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 245 transitions. Word has length 11 [2020-10-05 22:17:23,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:23,985 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 245 transitions. [2020-10-05 22:17:23,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 22:17:23,985 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 245 transitions. [2020-10-05 22:17:23,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-05 22:17:23,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:23,986 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:24,195 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-10-05 22:17:24,196 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:24,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:24,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1037803664, now seen corresponding path program 15 times [2020-10-05 22:17:24,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:24,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206147123] [2020-10-05 22:17:24,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:24,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:24,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:24,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206147123] [2020-10-05 22:17:24,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709779438] [2020-10-05 22:17:24,254 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 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 [2020-10-05 22:17:24,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-05 22:17:24,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:24,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 22:17:24,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:24,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:24,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:24,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-05 22:17:24,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910539273] [2020-10-05 22:17:24,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 22:17:24,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:24,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 22:17:24,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-05 22:17:24,385 INFO L87 Difference]: Start difference. First operand 101 states and 245 transitions. Second operand 11 states. [2020-10-05 22:17:24,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:24,484 INFO L93 Difference]: Finished difference Result 130 states and 301 transitions. [2020-10-05 22:17:24,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-05 22:17:24,484 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-05 22:17:24,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:24,485 INFO L225 Difference]: With dead ends: 130 [2020-10-05 22:17:24,485 INFO L226 Difference]: Without dead ends: 128 [2020-10-05 22:17:24,485 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-05 22:17:24,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-05 22:17:24,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 99. [2020-10-05 22:17:24,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-05 22:17:24,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-10-05 22:17:24,489 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-10-05 22:17:24,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:24,490 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-10-05 22:17:24,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 22:17:24,490 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-10-05 22:17:24,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-05 22:17:24,490 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:24,490 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:24,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-05 22:17:24,702 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:24,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:24,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1038466754, now seen corresponding path program 16 times [2020-10-05 22:17:24,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:24,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619338073] [2020-10-05 22:17:24,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:24,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:24,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:24,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619338073] [2020-10-05 22:17:24,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591241809] [2020-10-05 22:17:24,750 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 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 [2020-10-05 22:17:24,789 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:17:24,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:24,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 22:17:24,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:24,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:24,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:24,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-05 22:17:24,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118661917] [2020-10-05 22:17:24,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 22:17:24,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:24,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 22:17:24,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-05 22:17:24,872 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-10-05 22:17:25,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:25,003 INFO L93 Difference]: Finished difference Result 131 states and 303 transitions. [2020-10-05 22:17:25,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-05 22:17:25,004 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-05 22:17:25,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:25,005 INFO L225 Difference]: With dead ends: 131 [2020-10-05 22:17:25,005 INFO L226 Difference]: Without dead ends: 129 [2020-10-05 22:17:25,005 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2020-10-05 22:17:25,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-05 22:17:25,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 101. [2020-10-05 22:17:25,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-05 22:17:25,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-10-05 22:17:25,009 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-10-05 22:17:25,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:25,009 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-10-05 22:17:25,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 22:17:25,010 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-10-05 22:17:25,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-05 22:17:25,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:25,010 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:25,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-05 22:17:25,218 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:25,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:25,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1038488113, now seen corresponding path program 17 times [2020-10-05 22:17:25,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:25,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827379911] [2020-10-05 22:17:25,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:25,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:25,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:25,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827379911] [2020-10-05 22:17:25,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577752306] [2020-10-05 22:17:25,265 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 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 [2020-10-05 22:17:25,301 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:17:25,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:25,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 22:17:25,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:25,349 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:17:25,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:25,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:25,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-05 22:17:25,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386935324] [2020-10-05 22:17:25,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 22:17:25,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:25,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 22:17:25,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-05 22:17:25,359 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-10-05 22:17:25,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:25,488 INFO L93 Difference]: Finished difference Result 131 states and 311 transitions. [2020-10-05 22:17:25,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-05 22:17:25,489 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-05 22:17:25,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:25,490 INFO L225 Difference]: With dead ends: 131 [2020-10-05 22:17:25,490 INFO L226 Difference]: Without dead ends: 126 [2020-10-05 22:17:25,491 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:17:25,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-05 22:17:25,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 101. [2020-10-05 22:17:25,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-05 22:17:25,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-10-05 22:17:25,495 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-10-05 22:17:25,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:25,496 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-10-05 22:17:25,496 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 22:17:25,496 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-10-05 22:17:25,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-05 22:17:25,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:25,497 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:25,710 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:25,711 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:25,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:25,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1038489074, now seen corresponding path program 18 times [2020-10-05 22:17:25,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:25,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988296354] [2020-10-05 22:17:25,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:25,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:25,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:25,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988296354] [2020-10-05 22:17:25,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678807164] [2020-10-05 22:17:25,767 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 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 [2020-10-05 22:17:25,804 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-05 22:17:25,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:25,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 22:17:25,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:25,857 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:17:25,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:25,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:25,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-05 22:17:25,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497478101] [2020-10-05 22:17:25,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 22:17:25,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:25,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 22:17:25,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-05 22:17:25,867 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-10-05 22:17:26,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:26,077 INFO L93 Difference]: Finished difference Result 145 states and 339 transitions. [2020-10-05 22:17:26,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-05 22:17:26,078 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-05 22:17:26,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:26,079 INFO L225 Difference]: With dead ends: 145 [2020-10-05 22:17:26,079 INFO L226 Difference]: Without dead ends: 140 [2020-10-05 22:17:26,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-10-05 22:17:26,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-05 22:17:26,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 99. [2020-10-05 22:17:26,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-05 22:17:26,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-10-05 22:17:26,084 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-10-05 22:17:26,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:26,084 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-10-05 22:17:26,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 22:17:26,084 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-10-05 22:17:26,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-05 22:17:26,085 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:26,085 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:26,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-10-05 22:17:26,293 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:26,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:26,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1038517904, now seen corresponding path program 19 times [2020-10-05 22:17:26,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:26,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960743771] [2020-10-05 22:17:26,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:26,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:26,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:26,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960743771] [2020-10-05 22:17:26,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532583400] [2020-10-05 22:17:26,349 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 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 [2020-10-05 22:17:26,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:26,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 22:17:26,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:26,438 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:17:26,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:26,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:26,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-05 22:17:26,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171707726] [2020-10-05 22:17:26,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 22:17:26,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:26,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 22:17:26,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-05 22:17:26,449 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-10-05 22:17:26,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:26,619 INFO L93 Difference]: Finished difference Result 135 states and 315 transitions. [2020-10-05 22:17:26,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-05 22:17:26,620 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-05 22:17:26,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:26,621 INFO L225 Difference]: With dead ends: 135 [2020-10-05 22:17:26,621 INFO L226 Difference]: Without dead ends: 130 [2020-10-05 22:17:26,622 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:17:26,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-05 22:17:26,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 98. [2020-10-05 22:17:26,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-05 22:17:26,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 231 transitions. [2020-10-05 22:17:26,626 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 231 transitions. Word has length 11 [2020-10-05 22:17:26,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:26,626 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 231 transitions. [2020-10-05 22:17:26,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 22:17:26,626 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 231 transitions. [2020-10-05 22:17:26,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-05 22:17:26,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:26,627 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:26,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:26,828 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:26,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:26,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1266597800, now seen corresponding path program 4 times [2020-10-05 22:17:26,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:26,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587096672] [2020-10-05 22:17:26,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:26,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:26,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:26,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587096672] [2020-10-05 22:17:26,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730706277] [2020-10-05 22:17:26,889 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 [2020-10-05 22:17:26,933 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:17:26,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:26,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:26,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:27,052 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:17:27,075 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:27,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:27,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-10-05 22:17:27,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803331022] [2020-10-05 22:17:27,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-05 22:17:27,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:27,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-05 22:17:27,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-10-05 22:17:27,077 INFO L87 Difference]: Start difference. First operand 98 states and 231 transitions. Second operand 14 states. [2020-10-05 22:17:27,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:27,187 INFO L93 Difference]: Finished difference Result 143 states and 333 transitions. [2020-10-05 22:17:27,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-05 22:17:27,188 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-10-05 22:17:27,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:27,189 INFO L225 Difference]: With dead ends: 143 [2020-10-05 22:17:27,189 INFO L226 Difference]: Without dead ends: 138 [2020-10-05 22:17:27,189 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-10-05 22:17:27,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-05 22:17:27,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 105. [2020-10-05 22:17:27,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-05 22:17:27,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 257 transitions. [2020-10-05 22:17:27,193 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 257 transitions. Word has length 11 [2020-10-05 22:17:27,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:27,194 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 257 transitions. [2020-10-05 22:17:27,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-05 22:17:27,194 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 257 transitions. [2020-10-05 22:17:27,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-05 22:17:27,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:27,194 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:27,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-10-05 22:17:27,405 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:27,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:27,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1615862390, now seen corresponding path program 10 times [2020-10-05 22:17:27,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:27,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950374539] [2020-10-05 22:17:27,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:27,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:27,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:27,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950374539] [2020-10-05 22:17:27,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093730607] [2020-10-05 22:17:27,491 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 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 [2020-10-05 22:17:27,528 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:17:27,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:27,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:27,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:27,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:27,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:27,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 22:17:27,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127429898] [2020-10-05 22:17:27,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:17:27,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:27,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:17:27,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:27,628 INFO L87 Difference]: Start difference. First operand 105 states and 257 transitions. Second operand 13 states. [2020-10-05 22:17:27,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:27,669 INFO L93 Difference]: Finished difference Result 132 states and 311 transitions. [2020-10-05 22:17:27,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-05 22:17:27,670 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-05 22:17:27,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:27,671 INFO L225 Difference]: With dead ends: 132 [2020-10-05 22:17:27,671 INFO L226 Difference]: Without dead ends: 129 [2020-10-05 22:17:27,671 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:27,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-05 22:17:27,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 110. [2020-10-05 22:17:27,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-05 22:17:27,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-10-05 22:17:27,675 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-10-05 22:17:27,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:27,675 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-10-05 22:17:27,675 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:17:27,675 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-10-05 22:17:27,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-05 22:17:27,676 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:27,676 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:27,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-05 22:17:27,885 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:27,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:27,886 INFO L82 PathProgramCache]: Analyzing trace with hash -2014169786, now seen corresponding path program 11 times [2020-10-05 22:17:27,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:27,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516404469] [2020-10-05 22:17:27,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:27,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:27,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:27,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516404469] [2020-10-05 22:17:27,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262353021] [2020-10-05 22:17:27,984 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 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 [2020-10-05 22:17:28,036 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-05 22:17:28,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:28,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:28,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:28,119 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:28,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:28,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 22:17:28,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998149744] [2020-10-05 22:17:28,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:17:28,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:28,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:17:28,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:28,121 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-10-05 22:17:28,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:28,178 INFO L93 Difference]: Finished difference Result 143 states and 332 transitions. [2020-10-05 22:17:28,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-05 22:17:28,178 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-05 22:17:28,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:28,179 INFO L225 Difference]: With dead ends: 143 [2020-10-05 22:17:28,179 INFO L226 Difference]: Without dead ends: 140 [2020-10-05 22:17:28,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-10-05 22:17:28,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-05 22:17:28,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 110. [2020-10-05 22:17:28,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-05 22:17:28,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-10-05 22:17:28,183 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-10-05 22:17:28,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:28,184 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-10-05 22:17:28,184 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:17:28,184 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-10-05 22:17:28,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-05 22:17:28,184 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:28,185 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:28,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-10-05 22:17:28,385 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:28,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:28,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1992720266, now seen corresponding path program 12 times [2020-10-05 22:17:28,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:28,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066815585] [2020-10-05 22:17:28,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:28,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:28,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:28,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066815585] [2020-10-05 22:17:28,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628184405] [2020-10-05 22:17:28,468 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 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 [2020-10-05 22:17:28,521 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-05 22:17:28,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:28,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:28,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:28,605 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:28,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:28,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 22:17:28,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048490229] [2020-10-05 22:17:28,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:17:28,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:28,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:17:28,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:28,608 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-10-05 22:17:28,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:28,692 INFO L93 Difference]: Finished difference Result 142 states and 332 transitions. [2020-10-05 22:17:28,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-05 22:17:28,692 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-05 22:17:28,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:28,694 INFO L225 Difference]: With dead ends: 142 [2020-10-05 22:17:28,694 INFO L226 Difference]: Without dead ends: 139 [2020-10-05 22:17:28,694 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:17:28,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-05 22:17:28,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 112. [2020-10-05 22:17:28,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-05 22:17:28,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 275 transitions. [2020-10-05 22:17:28,698 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 275 transitions. Word has length 11 [2020-10-05 22:17:28,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:28,699 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 275 transitions. [2020-10-05 22:17:28,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:17:28,699 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 275 transitions. [2020-10-05 22:17:28,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-05 22:17:28,699 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:28,699 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:28,909 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-05 22:17:28,910 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:28,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:28,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1992028346, now seen corresponding path program 13 times [2020-10-05 22:17:28,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:28,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524534722] [2020-10-05 22:17:28,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:28,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:28,980 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:28,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524534722] [2020-10-05 22:17:28,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873438942] [2020-10-05 22:17:28,981 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 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 [2020-10-05 22:17:29,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:29,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:29,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:29,160 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:29,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:29,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 22:17:29,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424767747] [2020-10-05 22:17:29,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:17:29,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:29,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:17:29,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:29,163 INFO L87 Difference]: Start difference. First operand 112 states and 275 transitions. Second operand 13 states. [2020-10-05 22:17:29,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:29,286 INFO L93 Difference]: Finished difference Result 141 states and 332 transitions. [2020-10-05 22:17:29,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-05 22:17:29,286 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-05 22:17:29,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:29,288 INFO L225 Difference]: With dead ends: 141 [2020-10-05 22:17:29,288 INFO L226 Difference]: Without dead ends: 138 [2020-10-05 22:17:29,289 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-10-05 22:17:29,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-05 22:17:29,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 114. [2020-10-05 22:17:29,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-05 22:17:29,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 282 transitions. [2020-10-05 22:17:29,295 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 282 transitions. Word has length 11 [2020-10-05 22:17:29,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:29,295 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 282 transitions. [2020-10-05 22:17:29,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:17:29,295 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 282 transitions. [2020-10-05 22:17:29,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-05 22:17:29,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:29,297 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:29,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-05 22:17:29,510 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:29,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:29,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1992006026, now seen corresponding path program 14 times [2020-10-05 22:17:29,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:29,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367703935] [2020-10-05 22:17:29,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:29,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:29,590 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:29,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367703935] [2020-10-05 22:17:29,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947243586] [2020-10-05 22:17:29,591 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 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 [2020-10-05 22:17:29,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:17:29,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:29,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:29,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:29,762 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:17:29,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:29,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:29,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 22:17:29,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402918136] [2020-10-05 22:17:29,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:17:29,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:29,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:17:29,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:29,780 INFO L87 Difference]: Start difference. First operand 114 states and 282 transitions. Second operand 13 states. [2020-10-05 22:17:29,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:29,910 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-10-05 22:17:29,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-05 22:17:29,910 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-05 22:17:29,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:29,911 INFO L225 Difference]: With dead ends: 150 [2020-10-05 22:17:29,912 INFO L226 Difference]: Without dead ends: 144 [2020-10-05 22:17:29,912 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-10-05 22:17:29,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-05 22:17:29,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2020-10-05 22:17:29,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-05 22:17:29,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 282 transitions. [2020-10-05 22:17:29,915 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 282 transitions. Word has length 11 [2020-10-05 22:17:29,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:29,916 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 282 transitions. [2020-10-05 22:17:29,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:17:29,916 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 282 transitions. [2020-10-05 22:17:29,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:29,917 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:29,917 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:30,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:30,126 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:30,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:30,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1441283596, now seen corresponding path program 20 times [2020-10-05 22:17:30,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:30,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629589128] [2020-10-05 22:17:30,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:30,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:30,205 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:30,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629589128] [2020-10-05 22:17:30,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477756056] [2020-10-05 22:17:30,205 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 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 [2020-10-05 22:17:30,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:17:30,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:30,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:30,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:30,384 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:30,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:30,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 22:17:30,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770020708] [2020-10-05 22:17:30,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:17:30,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:30,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:17:30,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:30,386 INFO L87 Difference]: Start difference. First operand 113 states and 282 transitions. Second operand 13 states. [2020-10-05 22:17:30,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:30,432 INFO L93 Difference]: Finished difference Result 138 states and 332 transitions. [2020-10-05 22:17:30,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-05 22:17:30,433 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-05 22:17:30,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:30,434 INFO L225 Difference]: With dead ends: 138 [2020-10-05 22:17:30,434 INFO L226 Difference]: Without dead ends: 136 [2020-10-05 22:17:30,435 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:30,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-05 22:17:30,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 117. [2020-10-05 22:17:30,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-05 22:17:30,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 294 transitions. [2020-10-05 22:17:30,439 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 294 transitions. Word has length 12 [2020-10-05 22:17:30,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:30,439 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 294 transitions. [2020-10-05 22:17:30,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:17:30,440 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 294 transitions. [2020-10-05 22:17:30,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:30,440 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:30,440 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:30,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-05 22:17:30,649 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:30,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:30,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1441284557, now seen corresponding path program 21 times [2020-10-05 22:17:30,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:30,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620414339] [2020-10-05 22:17:30,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:30,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:30,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:30,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620414339] [2020-10-05 22:17:30,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499520740] [2020-10-05 22:17:30,718 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 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 [2020-10-05 22:17:30,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-05 22:17:30,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:30,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:30,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:30,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:30,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:30,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 22:17:30,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489982287] [2020-10-05 22:17:30,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:17:30,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:30,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:17:30,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:30,862 INFO L87 Difference]: Start difference. First operand 117 states and 294 transitions. Second operand 13 states. [2020-10-05 22:17:30,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:30,977 INFO L93 Difference]: Finished difference Result 145 states and 346 transitions. [2020-10-05 22:17:30,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-05 22:17:30,978 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-05 22:17:30,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:30,979 INFO L225 Difference]: With dead ends: 145 [2020-10-05 22:17:30,979 INFO L226 Difference]: Without dead ends: 143 [2020-10-05 22:17:30,980 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2020-10-05 22:17:30,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-05 22:17:30,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 115. [2020-10-05 22:17:30,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-05 22:17:30,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 288 transitions. [2020-10-05 22:17:30,984 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 288 transitions. Word has length 12 [2020-10-05 22:17:30,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:30,984 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 288 transitions. [2020-10-05 22:17:30,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:17:30,984 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 288 transitions. [2020-10-05 22:17:30,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:30,985 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:30,985 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:31,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-05 22:17:31,195 INFO L427 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:31,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:31,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1441313387, now seen corresponding path program 22 times [2020-10-05 22:17:31,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:31,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950974022] [2020-10-05 22:17:31,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:31,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:31,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:31,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950974022] [2020-10-05 22:17:31,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241192476] [2020-10-05 22:17:31,268 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 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 [2020-10-05 22:17:31,312 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:17:31,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:31,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:31,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:31,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:31,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:31,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 22:17:31,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45184479] [2020-10-05 22:17:31,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:17:31,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:31,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:17:31,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:31,401 INFO L87 Difference]: Start difference. First operand 115 states and 288 transitions. Second operand 13 states. [2020-10-05 22:17:31,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:31,524 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-10-05 22:17:31,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-05 22:17:31,525 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-05 22:17:31,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:31,526 INFO L225 Difference]: With dead ends: 150 [2020-10-05 22:17:31,526 INFO L226 Difference]: Without dead ends: 148 [2020-10-05 22:17:31,526 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:17:31,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-05 22:17:31,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 116. [2020-10-05 22:17:31,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-05 22:17:31,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 289 transitions. [2020-10-05 22:17:31,533 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 289 transitions. Word has length 12 [2020-10-05 22:17:31,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:31,533 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 289 transitions. [2020-10-05 22:17:31,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:17:31,533 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 289 transitions. [2020-10-05 22:17:31,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:31,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:31,534 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:31,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:31,744 INFO L427 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:31,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:31,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1442207117, now seen corresponding path program 23 times [2020-10-05 22:17:31,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:31,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556407794] [2020-10-05 22:17:31,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:31,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:31,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:31,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556407794] [2020-10-05 22:17:31,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68342729] [2020-10-05 22:17:31,817 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 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 [2020-10-05 22:17:31,860 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-05 22:17:31,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:31,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:31,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:31,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:31,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:31,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 22:17:31,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534502019] [2020-10-05 22:17:31,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:17:31,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:31,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:17:31,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:31,963 INFO L87 Difference]: Start difference. First operand 116 states and 289 transitions. Second operand 13 states. [2020-10-05 22:17:32,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:32,099 INFO L93 Difference]: Finished difference Result 148 states and 352 transitions. [2020-10-05 22:17:32,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-05 22:17:32,099 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-05 22:17:32,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:32,101 INFO L225 Difference]: With dead ends: 148 [2020-10-05 22:17:32,101 INFO L226 Difference]: Without dead ends: 146 [2020-10-05 22:17:32,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:17:32,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-05 22:17:32,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 120. [2020-10-05 22:17:32,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-05 22:17:32,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-10-05 22:17:32,106 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-10-05 22:17:32,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:32,106 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-10-05 22:17:32,106 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:17:32,107 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-10-05 22:17:32,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:32,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:32,108 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:32,318 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-05 22:17:32,318 INFO L427 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:32,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:32,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1442208078, now seen corresponding path program 24 times [2020-10-05 22:17:32,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:32,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121997798] [2020-10-05 22:17:32,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:32,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:32,417 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:32,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121997798] [2020-10-05 22:17:32,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610343498] [2020-10-05 22:17:32,418 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 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 [2020-10-05 22:17:32,457 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-05 22:17:32,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:32,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:32,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:32,538 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:32,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:32,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 22:17:32,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692810341] [2020-10-05 22:17:32,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:17:32,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:32,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:17:32,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:32,540 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-10-05 22:17:32,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:32,653 INFO L93 Difference]: Finished difference Result 149 states and 354 transitions. [2020-10-05 22:17:32,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-05 22:17:32,653 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-05 22:17:32,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:32,654 INFO L225 Difference]: With dead ends: 149 [2020-10-05 22:17:32,654 INFO L226 Difference]: Without dead ends: 147 [2020-10-05 22:17:32,655 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:17:32,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-05 22:17:32,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 118. [2020-10-05 22:17:32,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-05 22:17:32,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 293 transitions. [2020-10-05 22:17:32,659 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 293 transitions. Word has length 12 [2020-10-05 22:17:32,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:32,659 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 293 transitions. [2020-10-05 22:17:32,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:17:32,659 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 293 transitions. [2020-10-05 22:17:32,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:32,660 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:32,660 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:32,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:32,870 INFO L427 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:32,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:32,870 INFO L82 PathProgramCache]: Analyzing trace with hash 2078513086, now seen corresponding path program 25 times [2020-10-05 22:17:32,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:32,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290607766] [2020-10-05 22:17:32,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:32,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:32,957 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:32,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290607766] [2020-10-05 22:17:32,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145181796] [2020-10-05 22:17:32,957 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 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 [2020-10-05 22:17:33,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:33,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:33,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:33,139 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:33,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:33,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 22:17:33,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906457354] [2020-10-05 22:17:33,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:17:33,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:33,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:17:33,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:33,141 INFO L87 Difference]: Start difference. First operand 118 states and 293 transitions. Second operand 13 states. [2020-10-05 22:17:33,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:33,214 INFO L93 Difference]: Finished difference Result 152 states and 360 transitions. [2020-10-05 22:17:33,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-05 22:17:33,215 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-05 22:17:33,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:33,216 INFO L225 Difference]: With dead ends: 152 [2020-10-05 22:17:33,217 INFO L226 Difference]: Without dead ends: 150 [2020-10-05 22:17:33,217 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-10-05 22:17:33,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-05 22:17:33,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 122. [2020-10-05 22:17:33,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-05 22:17:33,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 305 transitions. [2020-10-05 22:17:33,223 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 305 transitions. Word has length 12 [2020-10-05 22:17:33,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:33,223 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 305 transitions. [2020-10-05 22:17:33,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:17:33,223 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 305 transitions. [2020-10-05 22:17:33,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:33,224 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:33,224 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:33,436 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-05 22:17:33,436 INFO L427 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:33,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:33,437 INFO L82 PathProgramCache]: Analyzing trace with hash 2078514047, now seen corresponding path program 26 times [2020-10-05 22:17:33,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:33,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34432046] [2020-10-05 22:17:33,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:33,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:33,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:33,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34432046] [2020-10-05 22:17:33,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348190038] [2020-10-05 22:17:33,541 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 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 [2020-10-05 22:17:33,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:17:33,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:33,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:33,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:33,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:33,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:33,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 22:17:33,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991306295] [2020-10-05 22:17:33,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:17:33,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:33,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:17:33,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:33,678 INFO L87 Difference]: Start difference. First operand 122 states and 305 transitions. Second operand 13 states. [2020-10-05 22:17:33,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:33,816 INFO L93 Difference]: Finished difference Result 153 states and 361 transitions. [2020-10-05 22:17:33,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-05 22:17:33,817 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-05 22:17:33,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:33,818 INFO L225 Difference]: With dead ends: 153 [2020-10-05 22:17:33,818 INFO L226 Difference]: Without dead ends: 151 [2020-10-05 22:17:33,818 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:17:33,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-05 22:17:33,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 120. [2020-10-05 22:17:33,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-05 22:17:33,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-10-05 22:17:33,822 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-10-05 22:17:33,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:33,822 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-10-05 22:17:33,822 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:17:33,822 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-10-05 22:17:33,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:33,823 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:33,823 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:34,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-10-05 22:17:34,032 INFO L427 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:34,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:34,033 INFO L82 PathProgramCache]: Analyzing trace with hash 2078542877, now seen corresponding path program 27 times [2020-10-05 22:17:34,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:34,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704656857] [2020-10-05 22:17:34,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:34,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:34,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:34,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704656857] [2020-10-05 22:17:34,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608479540] [2020-10-05 22:17:34,098 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 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 [2020-10-05 22:17:34,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-05 22:17:34,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:34,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:34,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:34,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:34,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:34,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 22:17:34,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440369943] [2020-10-05 22:17:34,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:17:34,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:34,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:17:34,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:34,222 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-10-05 22:17:34,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:34,360 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-05 22:17:34,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-05 22:17:34,373 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-05 22:17:34,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:34,374 INFO L225 Difference]: With dead ends: 156 [2020-10-05 22:17:34,374 INFO L226 Difference]: Without dead ends: 154 [2020-10-05 22:17:34,374 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-10-05 22:17:34,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-05 22:17:34,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 119. [2020-10-05 22:17:34,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-05 22:17:34,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 295 transitions. [2020-10-05 22:17:34,377 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 295 transitions. Word has length 12 [2020-10-05 22:17:34,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:34,377 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 295 transitions. [2020-10-05 22:17:34,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:17:34,378 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 295 transitions. [2020-10-05 22:17:34,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:34,378 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:34,378 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:34,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-05 22:17:34,587 INFO L427 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:34,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:34,588 INFO L82 PathProgramCache]: Analyzing trace with hash 2099068876, now seen corresponding path program 28 times [2020-10-05 22:17:34,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:34,588 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513079757] [2020-10-05 22:17:34,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:34,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:34,660 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:34,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513079757] [2020-10-05 22:17:34,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145317928] [2020-10-05 22:17:34,661 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 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 [2020-10-05 22:17:34,700 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:17:34,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:34,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:34,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:34,790 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:34,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:34,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 22:17:34,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236716186] [2020-10-05 22:17:34,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:17:34,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:34,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:17:34,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:34,792 INFO L87 Difference]: Start difference. First operand 119 states and 295 transitions. Second operand 13 states. [2020-10-05 22:17:34,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:34,878 INFO L93 Difference]: Finished difference Result 148 states and 351 transitions. [2020-10-05 22:17:34,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-05 22:17:34,879 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-05 22:17:34,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:34,880 INFO L225 Difference]: With dead ends: 148 [2020-10-05 22:17:34,880 INFO L226 Difference]: Without dead ends: 146 [2020-10-05 22:17:34,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:17:34,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-05 22:17:34,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 121. [2020-10-05 22:17:34,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-05 22:17:34,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-10-05 22:17:34,884 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-10-05 22:17:34,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:34,884 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-10-05 22:17:34,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:17:34,884 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-10-05 22:17:34,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:34,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:34,885 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:35,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-10-05 22:17:35,093 INFO L427 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:35,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:35,093 INFO L82 PathProgramCache]: Analyzing trace with hash 2099069837, now seen corresponding path program 29 times [2020-10-05 22:17:35,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:35,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526619521] [2020-10-05 22:17:35,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:35,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:35,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:35,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526619521] [2020-10-05 22:17:35,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960467681] [2020-10-05 22:17:35,158 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 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 [2020-10-05 22:17:35,197 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:17:35,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:35,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:35,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:35,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:35,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:35,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 22:17:35,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533613643] [2020-10-05 22:17:35,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:17:35,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:35,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:17:35,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:35,301 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-10-05 22:17:35,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:35,455 INFO L93 Difference]: Finished difference Result 157 states and 368 transitions. [2020-10-05 22:17:35,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-05 22:17:35,455 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-05 22:17:35,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:35,456 INFO L225 Difference]: With dead ends: 157 [2020-10-05 22:17:35,456 INFO L226 Difference]: Without dead ends: 155 [2020-10-05 22:17:35,457 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-10-05 22:17:35,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-05 22:17:35,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 120. [2020-10-05 22:17:35,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-05 22:17:35,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 297 transitions. [2020-10-05 22:17:35,460 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 297 transitions. Word has length 12 [2020-10-05 22:17:35,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:35,460 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 297 transitions. [2020-10-05 22:17:35,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:17:35,461 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 297 transitions. [2020-10-05 22:17:35,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:35,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:35,461 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:35,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:35,670 INFO L427 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:35,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:35,670 INFO L82 PathProgramCache]: Analyzing trace with hash 2099731966, now seen corresponding path program 30 times [2020-10-05 22:17:35,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:35,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177810122] [2020-10-05 22:17:35,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:35,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:35,739 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:35,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177810122] [2020-10-05 22:17:35,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259577654] [2020-10-05 22:17:35,740 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 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 [2020-10-05 22:17:35,785 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-05 22:17:35,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:35,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:35,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:35,876 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:35,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:35,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 22:17:35,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255461051] [2020-10-05 22:17:35,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:17:35,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:35,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:17:35,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:35,878 INFO L87 Difference]: Start difference. First operand 120 states and 297 transitions. Second operand 13 states. [2020-10-05 22:17:35,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:35,967 INFO L93 Difference]: Finished difference Result 149 states and 350 transitions. [2020-10-05 22:17:35,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-05 22:17:35,972 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-05 22:17:35,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:35,973 INFO L225 Difference]: With dead ends: 149 [2020-10-05 22:17:35,973 INFO L226 Difference]: Without dead ends: 147 [2020-10-05 22:17:35,974 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-10-05 22:17:35,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-05 22:17:35,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 124. [2020-10-05 22:17:35,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-05 22:17:35,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-05 22:17:35,977 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-05 22:17:35,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:35,978 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-05 22:17:35,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:17:35,978 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-05 22:17:35,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:35,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:35,978 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:36,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-05 22:17:36,189 INFO L427 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:36,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:36,190 INFO L82 PathProgramCache]: Analyzing trace with hash 2099754286, now seen corresponding path program 31 times [2020-10-05 22:17:36,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:36,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712184596] [2020-10-05 22:17:36,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:36,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:36,246 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:36,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712184596] [2020-10-05 22:17:36,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764541441] [2020-10-05 22:17:36,247 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 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 [2020-10-05 22:17:36,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:36,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:36,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:36,378 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:17:36,411 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:36,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:36,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 22:17:36,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264183634] [2020-10-05 22:17:36,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:17:36,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:36,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:17:36,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:36,413 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-05 22:17:36,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:36,674 INFO L93 Difference]: Finished difference Result 164 states and 389 transitions. [2020-10-05 22:17:36,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-05 22:17:36,675 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-05 22:17:36,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:36,676 INFO L225 Difference]: With dead ends: 164 [2020-10-05 22:17:36,676 INFO L226 Difference]: Without dead ends: 159 [2020-10-05 22:17:36,677 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-05 22:17:36,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-05 22:17:36,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-10-05 22:17:36,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-05 22:17:36,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 296 transitions. [2020-10-05 22:17:36,680 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 296 transitions. Word has length 12 [2020-10-05 22:17:36,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:36,680 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 296 transitions. [2020-10-05 22:17:36,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:17:36,680 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 296 transitions. [2020-10-05 22:17:36,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:36,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:36,681 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:36,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-05 22:17:36,882 INFO L427 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:36,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:36,883 INFO L82 PathProgramCache]: Analyzing trace with hash 2099761757, now seen corresponding path program 32 times [2020-10-05 22:17:36,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:36,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867629933] [2020-10-05 22:17:36,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:36,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:36,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:36,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867629933] [2020-10-05 22:17:36,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223325060] [2020-10-05 22:17:36,942 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 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 [2020-10-05 22:17:36,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:17:36,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:36,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:36,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:37,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:37,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:37,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 22:17:37,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996985292] [2020-10-05 22:17:37,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:17:37,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:37,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:17:37,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:37,105 INFO L87 Difference]: Start difference. First operand 122 states and 296 transitions. Second operand 13 states. [2020-10-05 22:17:37,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:37,272 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-05 22:17:37,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-05 22:17:37,272 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-05 22:17:37,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:37,274 INFO L225 Difference]: With dead ends: 156 [2020-10-05 22:17:37,274 INFO L226 Difference]: Without dead ends: 154 [2020-10-05 22:17:37,274 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2020-10-05 22:17:37,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-05 22:17:37,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 124. [2020-10-05 22:17:37,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-05 22:17:37,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-05 22:17:37,278 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-05 22:17:37,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:37,279 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-05 22:17:37,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:17:37,279 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-05 22:17:37,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:37,279 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:37,279 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:37,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:37,490 INFO L427 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:37,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:37,490 INFO L82 PathProgramCache]: Analyzing trace with hash 2099783116, now seen corresponding path program 33 times [2020-10-05 22:17:37,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:37,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197152512] [2020-10-05 22:17:37,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:37,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:37,546 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:37,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197152512] [2020-10-05 22:17:37,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109081137] [2020-10-05 22:17:37,546 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 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 [2020-10-05 22:17:37,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-05 22:17:37,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:37,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:37,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:37,668 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:17:37,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:37,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:37,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 22:17:37,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413164607] [2020-10-05 22:17:37,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:17:37,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:37,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:17:37,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:37,704 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-05 22:17:38,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:38,031 INFO L93 Difference]: Finished difference Result 176 states and 416 transitions. [2020-10-05 22:17:38,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-05 22:17:38,031 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-05 22:17:38,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:38,033 INFO L225 Difference]: With dead ends: 176 [2020-10-05 22:17:38,033 INFO L226 Difference]: Without dead ends: 171 [2020-10-05 22:17:38,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2020-10-05 22:17:38,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-05 22:17:38,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 124. [2020-10-05 22:17:38,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-05 22:17:38,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-05 22:17:38,038 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-05 22:17:38,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:38,038 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-05 22:17:38,038 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:17:38,038 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-05 22:17:38,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:38,039 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:38,039 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:38,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-10-05 22:17:38,249 INFO L427 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:38,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:38,250 INFO L82 PathProgramCache]: Analyzing trace with hash 2099784077, now seen corresponding path program 34 times [2020-10-05 22:17:38,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:38,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307346715] [2020-10-05 22:17:38,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:38,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:38,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:38,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307346715] [2020-10-05 22:17:38,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412988396] [2020-10-05 22:17:38,310 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 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 [2020-10-05 22:17:38,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:17:38,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:38,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:38,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:38,439 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:17:38,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:38,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:38,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 22:17:38,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811797702] [2020-10-05 22:17:38,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:17:38,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:38,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:17:38,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:38,481 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-05 22:17:38,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:38,733 INFO L93 Difference]: Finished difference Result 166 states and 393 transitions. [2020-10-05 22:17:38,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-05 22:17:38,734 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-05 22:17:38,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:38,735 INFO L225 Difference]: With dead ends: 166 [2020-10-05 22:17:38,735 INFO L226 Difference]: Without dead ends: 161 [2020-10-05 22:17:38,735 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-05 22:17:38,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-05 22:17:38,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 121. [2020-10-05 22:17:38,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-05 22:17:38,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 294 transitions. [2020-10-05 22:17:38,739 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 294 transitions. Word has length 12 [2020-10-05 22:17:38,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:38,739 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 294 transitions. [2020-10-05 22:17:38,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:17:38,739 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 294 transitions. [2020-10-05 22:17:38,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:38,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:38,740 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:38,949 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:38,950 INFO L427 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:38,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:38,950 INFO L82 PathProgramCache]: Analyzing trace with hash 2099992397, now seen corresponding path program 35 times [2020-10-05 22:17:38,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:38,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077855034] [2020-10-05 22:17:38,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:38,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:39,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:39,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077855034] [2020-10-05 22:17:39,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852416242] [2020-10-05 22:17:39,004 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 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 [2020-10-05 22:17:39,046 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:17:39,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:39,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:39,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:39,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:39,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:39,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 22:17:39,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965545713] [2020-10-05 22:17:39,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:17:39,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:39,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:17:39,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:39,140 INFO L87 Difference]: Start difference. First operand 121 states and 294 transitions. Second operand 13 states. [2020-10-05 22:17:39,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:39,301 INFO L93 Difference]: Finished difference Result 163 states and 379 transitions. [2020-10-05 22:17:39,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-05 22:17:39,302 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-05 22:17:39,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:39,303 INFO L225 Difference]: With dead ends: 163 [2020-10-05 22:17:39,303 INFO L226 Difference]: Without dead ends: 161 [2020-10-05 22:17:39,304 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-05 22:17:39,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-05 22:17:39,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 123. [2020-10-05 22:17:39,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-05 22:17:39,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 301 transitions. [2020-10-05 22:17:39,307 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 301 transitions. Word has length 12 [2020-10-05 22:17:39,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:39,308 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 301 transitions. [2020-10-05 22:17:39,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:17:39,308 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 301 transitions. [2020-10-05 22:17:39,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:39,308 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:39,308 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:39,518 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-10-05 22:17:39,519 INFO L427 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:39,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:39,519 INFO L82 PathProgramCache]: Analyzing trace with hash 2100655487, now seen corresponding path program 36 times [2020-10-05 22:17:39,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:39,520 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619281531] [2020-10-05 22:17:39,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:39,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:39,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:39,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619281531] [2020-10-05 22:17:39,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905098207] [2020-10-05 22:17:39,576 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 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 [2020-10-05 22:17:39,629 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-05 22:17:39,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:39,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:39,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:39,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:39,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:39,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 22:17:39,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24029788] [2020-10-05 22:17:39,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:17:39,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:39,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:17:39,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:39,733 INFO L87 Difference]: Start difference. First operand 123 states and 301 transitions. Second operand 13 states. [2020-10-05 22:17:39,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:39,989 INFO L93 Difference]: Finished difference Result 170 states and 399 transitions. [2020-10-05 22:17:39,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 22:17:39,989 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-05 22:17:39,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:39,991 INFO L225 Difference]: With dead ends: 170 [2020-10-05 22:17:39,991 INFO L226 Difference]: Without dead ends: 168 [2020-10-05 22:17:39,991 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2020-10-05 22:17:39,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-05 22:17:39,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 125. [2020-10-05 22:17:39,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-05 22:17:39,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 308 transitions. [2020-10-05 22:17:39,995 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 308 transitions. Word has length 12 [2020-10-05 22:17:39,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:39,995 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 308 transitions. [2020-10-05 22:17:39,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:17:39,995 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 308 transitions. [2020-10-05 22:17:39,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:39,995 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:39,995 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:40,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:40,196 INFO L427 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:40,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:40,197 INFO L82 PathProgramCache]: Analyzing trace with hash 2100676846, now seen corresponding path program 37 times [2020-10-05 22:17:40,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:40,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41753551] [2020-10-05 22:17:40,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:40,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:40,254 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:40,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41753551] [2020-10-05 22:17:40,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815754476] [2020-10-05 22:17:40,255 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 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 [2020-10-05 22:17:40,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:40,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:40,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:40,387 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:17:40,396 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:40,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:40,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 22:17:40,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252827914] [2020-10-05 22:17:40,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:17:40,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:40,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:17:40,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:40,402 INFO L87 Difference]: Start difference. First operand 125 states and 308 transitions. Second operand 13 states. [2020-10-05 22:17:40,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:40,708 INFO L93 Difference]: Finished difference Result 177 states and 424 transitions. [2020-10-05 22:17:40,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-05 22:17:40,709 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-05 22:17:40,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:40,710 INFO L225 Difference]: With dead ends: 177 [2020-10-05 22:17:40,710 INFO L226 Difference]: Without dead ends: 172 [2020-10-05 22:17:40,711 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-05 22:17:40,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-05 22:17:40,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 126. [2020-10-05 22:17:40,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-05 22:17:40,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 313 transitions. [2020-10-05 22:17:40,714 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 313 transitions. Word has length 12 [2020-10-05 22:17:40,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:40,715 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 313 transitions. [2020-10-05 22:17:40,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:17:40,715 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 313 transitions. [2020-10-05 22:17:40,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:40,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:40,715 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:40,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-10-05 22:17:40,925 INFO L427 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:40,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:40,926 INFO L82 PathProgramCache]: Analyzing trace with hash 2100677807, now seen corresponding path program 38 times [2020-10-05 22:17:40,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:40,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939151753] [2020-10-05 22:17:40,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:40,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:40,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:40,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939151753] [2020-10-05 22:17:40,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551506914] [2020-10-05 22:17:40,987 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 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 [2020-10-05 22:17:41,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:17:41,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:41,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:41,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:41,110 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:17:41,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:41,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:41,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 22:17:41,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492216052] [2020-10-05 22:17:41,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:17:41,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:41,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:17:41,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:41,121 INFO L87 Difference]: Start difference. First operand 126 states and 313 transitions. Second operand 13 states. [2020-10-05 22:17:41,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:41,487 INFO L93 Difference]: Finished difference Result 190 states and 454 transitions. [2020-10-05 22:17:41,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-05 22:17:41,487 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-05 22:17:41,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:41,489 INFO L225 Difference]: With dead ends: 190 [2020-10-05 22:17:41,489 INFO L226 Difference]: Without dead ends: 182 [2020-10-05 22:17:41,490 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-05 22:17:41,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-05 22:17:41,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 121. [2020-10-05 22:17:41,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-05 22:17:41,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 297 transitions. [2020-10-05 22:17:41,493 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 297 transitions. Word has length 12 [2020-10-05 22:17:41,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:41,493 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 297 transitions. [2020-10-05 22:17:41,493 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:17:41,493 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 297 transitions. [2020-10-05 22:17:41,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:41,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:41,494 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:41,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-10-05 22:17:41,695 INFO L427 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:41,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:41,695 INFO L82 PathProgramCache]: Analyzing trace with hash 2100706637, now seen corresponding path program 39 times [2020-10-05 22:17:41,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:41,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357290425] [2020-10-05 22:17:41,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:41,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:41,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:41,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357290425] [2020-10-05 22:17:41,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969880533] [2020-10-05 22:17:41,757 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 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 [2020-10-05 22:17:41,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-05 22:17:41,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:41,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-05 22:17:41,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:41,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:41,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:41,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-10-05 22:17:41,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555923883] [2020-10-05 22:17:41,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-05 22:17:41,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:41,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-05 22:17:41,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-05 22:17:41,852 INFO L87 Difference]: Start difference. First operand 121 states and 297 transitions. Second operand 12 states. [2020-10-05 22:17:42,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:42,188 INFO L93 Difference]: Finished difference Result 177 states and 419 transitions. [2020-10-05 22:17:42,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-05 22:17:42,188 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2020-10-05 22:17:42,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:42,190 INFO L225 Difference]: With dead ends: 177 [2020-10-05 22:17:42,190 INFO L226 Difference]: Without dead ends: 172 [2020-10-05 22:17:42,190 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2020-10-05 22:17:42,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-05 22:17:42,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 120. [2020-10-05 22:17:42,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-05 22:17:42,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 292 transitions. [2020-10-05 22:17:42,194 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 292 transitions. Word has length 12 [2020-10-05 22:17:42,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:42,194 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 292 transitions. [2020-10-05 22:17:42,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-05 22:17:42,194 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 292 transitions. [2020-10-05 22:17:42,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:42,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:42,194 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:42,395 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-10-05 22:17:42,395 INFO L427 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:42,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:42,396 INFO L82 PathProgramCache]: Analyzing trace with hash 2107142237, now seen corresponding path program 40 times [2020-10-05 22:17:42,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:42,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132498151] [2020-10-05 22:17:42,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:42,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:42,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:42,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132498151] [2020-10-05 22:17:42,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606536540] [2020-10-05 22:17:42,457 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 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 [2020-10-05 22:17:42,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:17:42,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:42,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:42,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:42,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:42,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:42,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 22:17:42,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973435146] [2020-10-05 22:17:42,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:17:42,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:42,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:17:42,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:42,592 INFO L87 Difference]: Start difference. First operand 120 states and 292 transitions. Second operand 13 states. [2020-10-05 22:17:42,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:42,731 INFO L93 Difference]: Finished difference Result 164 states and 379 transitions. [2020-10-05 22:17:42,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-05 22:17:42,731 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-05 22:17:42,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:42,733 INFO L225 Difference]: With dead ends: 164 [2020-10-05 22:17:42,733 INFO L226 Difference]: Without dead ends: 162 [2020-10-05 22:17:42,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2020-10-05 22:17:42,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-05 22:17:42,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 121. [2020-10-05 22:17:42,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-05 22:17:42,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 295 transitions. [2020-10-05 22:17:42,736 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 295 transitions. Word has length 12 [2020-10-05 22:17:42,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:42,736 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 295 transitions. [2020-10-05 22:17:42,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:17:42,737 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 295 transitions. [2020-10-05 22:17:42,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:42,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:42,737 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:42,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-10-05 22:17:42,938 INFO L427 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:42,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:42,938 INFO L82 PathProgramCache]: Analyzing trace with hash 2107143198, now seen corresponding path program 41 times [2020-10-05 22:17:42,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:42,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683459496] [2020-10-05 22:17:42,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:42,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:42,998 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:42,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683459496] [2020-10-05 22:17:42,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528000968] [2020-10-05 22:17:42,998 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 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 [2020-10-05 22:17:43,038 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:17:43,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:43,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:43,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:43,123 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:43,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:43,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 22:17:43,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408123193] [2020-10-05 22:17:43,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:17:43,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:43,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:17:43,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:43,125 INFO L87 Difference]: Start difference. First operand 121 states and 295 transitions. Second operand 13 states. [2020-10-05 22:17:43,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:43,281 INFO L93 Difference]: Finished difference Result 161 states and 372 transitions. [2020-10-05 22:17:43,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-05 22:17:43,282 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-05 22:17:43,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:43,283 INFO L225 Difference]: With dead ends: 161 [2020-10-05 22:17:43,283 INFO L226 Difference]: Without dead ends: 159 [2020-10-05 22:17:43,283 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-10-05 22:17:43,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-05 22:17:43,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 118. [2020-10-05 22:17:43,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-05 22:17:43,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 287 transitions. [2020-10-05 22:17:43,287 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 287 transitions. Word has length 12 [2020-10-05 22:17:43,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:43,287 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 287 transitions. [2020-10-05 22:17:43,287 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:17:43,287 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 287 transitions. [2020-10-05 22:17:43,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:43,288 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:43,288 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:43,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-10-05 22:17:43,489 INFO L427 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:43,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:43,490 INFO L82 PathProgramCache]: Analyzing trace with hash 2127698027, now seen corresponding path program 42 times [2020-10-05 22:17:43,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:43,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255839071] [2020-10-05 22:17:43,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:43,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:43,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:43,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255839071] [2020-10-05 22:17:43,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359083878] [2020-10-05 22:17:43,551 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 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 [2020-10-05 22:17:43,589 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-05 22:17:43,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:43,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:43,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:43,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:43,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:43,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 22:17:43,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354460690] [2020-10-05 22:17:43,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:17:43,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:43,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:17:43,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:43,700 INFO L87 Difference]: Start difference. First operand 118 states and 287 transitions. Second operand 13 states. [2020-10-05 22:17:43,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:43,884 INFO L93 Difference]: Finished difference Result 165 states and 380 transitions. [2020-10-05 22:17:43,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 22:17:43,885 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-05 22:17:43,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:43,886 INFO L225 Difference]: With dead ends: 165 [2020-10-05 22:17:43,886 INFO L226 Difference]: Without dead ends: 163 [2020-10-05 22:17:43,886 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2020-10-05 22:17:43,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-05 22:17:43,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 118. [2020-10-05 22:17:43,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-05 22:17:43,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 290 transitions. [2020-10-05 22:17:43,889 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 290 transitions. Word has length 12 [2020-10-05 22:17:43,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:43,890 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 290 transitions. [2020-10-05 22:17:43,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:17:43,890 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 290 transitions. [2020-10-05 22:17:43,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:43,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:43,890 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:44,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2020-10-05 22:17:44,092 INFO L427 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:44,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:44,092 INFO L82 PathProgramCache]: Analyzing trace with hash 2127698988, now seen corresponding path program 43 times [2020-10-05 22:17:44,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:44,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664158245] [2020-10-05 22:17:44,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:44,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:44,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:44,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664158245] [2020-10-05 22:17:44,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710433039] [2020-10-05 22:17:44,146 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 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 [2020-10-05 22:17:44,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:44,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:44,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:44,278 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:44,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:44,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 22:17:44,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177121240] [2020-10-05 22:17:44,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:17:44,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:44,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:17:44,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:44,280 INFO L87 Difference]: Start difference. First operand 118 states and 290 transitions. Second operand 13 states. [2020-10-05 22:17:44,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:44,469 INFO L93 Difference]: Finished difference Result 167 states and 384 transitions. [2020-10-05 22:17:44,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 22:17:44,470 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-05 22:17:44,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:44,471 INFO L225 Difference]: With dead ends: 167 [2020-10-05 22:17:44,471 INFO L226 Difference]: Without dead ends: 165 [2020-10-05 22:17:44,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-10-05 22:17:44,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-05 22:17:44,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 118. [2020-10-05 22:17:44,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-05 22:17:44,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-10-05 22:17:44,474 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-10-05 22:17:44,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:44,474 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-10-05 22:17:44,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:17:44,475 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-10-05 22:17:44,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:44,475 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:44,475 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:44,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:44,680 INFO L427 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:44,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:44,681 INFO L82 PathProgramCache]: Analyzing trace with hash 2128361117, now seen corresponding path program 44 times [2020-10-05 22:17:44,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:44,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374924109] [2020-10-05 22:17:44,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:44,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:44,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:44,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374924109] [2020-10-05 22:17:44,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641182401] [2020-10-05 22:17:44,734 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 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 [2020-10-05 22:17:44,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:17:44,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:44,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:44,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:44,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:44,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:44,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 22:17:44,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125371066] [2020-10-05 22:17:44,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:17:44,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:44,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:17:44,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:44,898 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-10-05 22:17:45,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:45,155 INFO L93 Difference]: Finished difference Result 168 states and 392 transitions. [2020-10-05 22:17:45,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-05 22:17:45,155 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-05 22:17:45,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:45,157 INFO L225 Difference]: With dead ends: 168 [2020-10-05 22:17:45,157 INFO L226 Difference]: Without dead ends: 166 [2020-10-05 22:17:45,157 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2020-10-05 22:17:45,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-05 22:17:45,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 120. [2020-10-05 22:17:45,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-05 22:17:45,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-10-05 22:17:45,160 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-10-05 22:17:45,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:45,160 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-10-05 22:17:45,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:17:45,160 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-10-05 22:17:45,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:45,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:45,161 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:45,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:45,361 INFO L427 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:45,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:45,362 INFO L82 PathProgramCache]: Analyzing trace with hash 2128382476, now seen corresponding path program 45 times [2020-10-05 22:17:45,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:45,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777118508] [2020-10-05 22:17:45,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:45,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:45,414 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:45,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777118508] [2020-10-05 22:17:45,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365946418] [2020-10-05 22:17:45,415 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 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 [2020-10-05 22:17:45,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-05 22:17:45,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:45,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:45,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:45,526 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:17:45,533 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:45,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:45,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 22:17:45,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927139526] [2020-10-05 22:17:45,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:17:45,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:45,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:17:45,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:45,535 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-10-05 22:17:45,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:45,734 INFO L93 Difference]: Finished difference Result 160 states and 384 transitions. [2020-10-05 22:17:45,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-05 22:17:45,735 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-05 22:17:45,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:45,736 INFO L225 Difference]: With dead ends: 160 [2020-10-05 22:17:45,736 INFO L226 Difference]: Without dead ends: 155 [2020-10-05 22:17:45,737 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-05 22:17:45,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-05 22:17:45,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 121. [2020-10-05 22:17:45,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-05 22:17:45,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-10-05 22:17:45,740 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-10-05 22:17:45,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:45,740 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-10-05 22:17:45,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:17:45,741 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-10-05 22:17:45,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:45,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:45,741 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:45,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:45,951 INFO L427 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:45,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:45,952 INFO L82 PathProgramCache]: Analyzing trace with hash 2128383437, now seen corresponding path program 46 times [2020-10-05 22:17:45,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:45,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234266962] [2020-10-05 22:17:45,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:45,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:46,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:46,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234266962] [2020-10-05 22:17:46,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820274637] [2020-10-05 22:17:46,004 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 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 [2020-10-05 22:17:46,041 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:17:46,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:46,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:46,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:46,115 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:17:46,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:46,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:46,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 22:17:46,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826829046] [2020-10-05 22:17:46,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:17:46,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:46,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:17:46,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:46,149 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-10-05 22:17:46,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:46,477 INFO L93 Difference]: Finished difference Result 189 states and 444 transitions. [2020-10-05 22:17:46,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-05 22:17:46,477 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-05 22:17:46,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:46,479 INFO L225 Difference]: With dead ends: 189 [2020-10-05 22:17:46,479 INFO L226 Difference]: Without dead ends: 181 [2020-10-05 22:17:46,479 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-10-05 22:17:46,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-05 22:17:46,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 118. [2020-10-05 22:17:46,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-05 22:17:46,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-10-05 22:17:46,483 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-10-05 22:17:46,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:46,483 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-10-05 22:17:46,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:17:46,484 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-10-05 22:17:46,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:46,484 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:46,484 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:46,693 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:46,694 INFO L427 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:46,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:46,694 INFO L82 PathProgramCache]: Analyzing trace with hash 2128390908, now seen corresponding path program 47 times [2020-10-05 22:17:46,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:46,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685460635] [2020-10-05 22:17:46,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:46,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:46,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:46,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685460635] [2020-10-05 22:17:46,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484722622] [2020-10-05 22:17:46,746 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 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 [2020-10-05 22:17:46,795 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:17:46,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:46,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:46,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:46,892 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:46,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:46,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 22:17:46,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952725847] [2020-10-05 22:17:46,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:17:46,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:46,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:17:46,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:46,893 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-10-05 22:17:47,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:47,121 INFO L93 Difference]: Finished difference Result 169 states and 393 transitions. [2020-10-05 22:17:47,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-05 22:17:47,122 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-05 22:17:47,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:47,123 INFO L225 Difference]: With dead ends: 169 [2020-10-05 22:17:47,124 INFO L226 Difference]: Without dead ends: 167 [2020-10-05 22:17:47,124 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-05 22:17:47,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-05 22:17:47,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 120. [2020-10-05 22:17:47,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-05 22:17:47,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-10-05 22:17:47,127 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-10-05 22:17:47,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:47,127 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-10-05 22:17:47,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:17:47,127 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-10-05 22:17:47,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:47,128 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:47,128 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:47,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-10-05 22:17:47,331 INFO L427 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:47,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:47,331 INFO L82 PathProgramCache]: Analyzing trace with hash 2128412267, now seen corresponding path program 48 times [2020-10-05 22:17:47,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:47,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201515144] [2020-10-05 22:17:47,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:47,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:47,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:47,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201515144] [2020-10-05 22:17:47,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227286478] [2020-10-05 22:17:47,385 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 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 [2020-10-05 22:17:47,428 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-05 22:17:47,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:47,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:47,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:47,499 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:17:47,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:47,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:47,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 22:17:47,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957275445] [2020-10-05 22:17:47,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:17:47,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:47,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:17:47,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:47,508 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-10-05 22:17:47,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:47,841 INFO L93 Difference]: Finished difference Result 192 states and 454 transitions. [2020-10-05 22:17:47,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-05 22:17:47,841 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-05 22:17:47,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:47,843 INFO L225 Difference]: With dead ends: 192 [2020-10-05 22:17:47,843 INFO L226 Difference]: Without dead ends: 184 [2020-10-05 22:17:47,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-05 22:17:47,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-05 22:17:47,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 119. [2020-10-05 22:17:47,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-05 22:17:47,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 287 transitions. [2020-10-05 22:17:47,846 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 287 transitions. Word has length 12 [2020-10-05 22:17:47,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:47,846 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 287 transitions. [2020-10-05 22:17:47,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:17:47,846 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 287 transitions. [2020-10-05 22:17:47,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:47,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:47,847 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:48,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:48,048 INFO L427 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:48,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:48,049 INFO L82 PathProgramCache]: Analyzing trace with hash 2128413228, now seen corresponding path program 49 times [2020-10-05 22:17:48,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:48,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620002271] [2020-10-05 22:17:48,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:48,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:48,108 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:48,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620002271] [2020-10-05 22:17:48,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864915896] [2020-10-05 22:17:48,109 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 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 [2020-10-05 22:17:48,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:48,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:17:48,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:48,215 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:17:48,224 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:48,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:48,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 22:17:48,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301211227] [2020-10-05 22:17:48,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:17:48,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:48,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:17:48,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:17:48,225 INFO L87 Difference]: Start difference. First operand 119 states and 287 transitions. Second operand 13 states. [2020-10-05 22:17:48,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:48,533 INFO L93 Difference]: Finished difference Result 180 states and 420 transitions. [2020-10-05 22:17:48,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-05 22:17:48,533 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-05 22:17:48,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:48,535 INFO L225 Difference]: With dead ends: 180 [2020-10-05 22:17:48,535 INFO L226 Difference]: Without dead ends: 175 [2020-10-05 22:17:48,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-05 22:17:48,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-05 22:17:48,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 114. [2020-10-05 22:17:48,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-05 22:17:48,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 268 transitions. [2020-10-05 22:17:48,539 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 268 transitions. Word has length 12 [2020-10-05 22:17:48,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:48,539 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 268 transitions. [2020-10-05 22:17:48,539 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:17:48,539 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 268 transitions. [2020-10-05 22:17:48,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:48,540 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:48,540 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:48,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-10-05 22:17:48,743 INFO L427 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:48,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:48,743 INFO L82 PathProgramCache]: Analyzing trace with hash 609848181, now seen corresponding path program 5 times [2020-10-05 22:17:48,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:48,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73474295] [2020-10-05 22:17:48,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:48,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:48,812 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:48,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73474295] [2020-10-05 22:17:48,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994083509] [2020-10-05 22:17:48,813 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 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 [2020-10-05 22:17:48,849 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-05 22:17:48,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:48,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:17:48,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:48,954 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:17:48,980 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:48,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:48,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-05 22:17:48,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854379503] [2020-10-05 22:17:48,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-05 22:17:48,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:48,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-05 22:17:48,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-10-05 22:17:48,981 INFO L87 Difference]: Start difference. First operand 114 states and 268 transitions. Second operand 16 states. [2020-10-05 22:17:49,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:49,121 INFO L93 Difference]: Finished difference Result 164 states and 382 transitions. [2020-10-05 22:17:49,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-05 22:17:49,122 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2020-10-05 22:17:49,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:49,123 INFO L225 Difference]: With dead ends: 164 [2020-10-05 22:17:49,123 INFO L226 Difference]: Without dead ends: 159 [2020-10-05 22:17:49,124 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-10-05 22:17:49,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-05 22:17:49,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-10-05 22:17:49,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-05 22:17:49,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 299 transitions. [2020-10-05 22:17:49,128 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 299 transitions. Word has length 12 [2020-10-05 22:17:49,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:49,128 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 299 transitions. [2020-10-05 22:17:49,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-05 22:17:49,129 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 299 transitions. [2020-10-05 22:17:49,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:49,129 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:49,129 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:49,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:49,330 INFO L427 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:49,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:49,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1447872776, now seen corresponding path program 15 times [2020-10-05 22:17:49,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:49,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611195291] [2020-10-05 22:17:49,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:49,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:49,437 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:49,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611195291] [2020-10-05 22:17:49,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860138440] [2020-10-05 22:17:49,438 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 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 [2020-10-05 22:17:49,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-05 22:17:49,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:49,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:17:49,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:49,600 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:49,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:49,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:17:49,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284756337] [2020-10-05 22:17:49,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:17:49,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:49,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:17:49,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:17:49,601 INFO L87 Difference]: Start difference. First operand 122 states and 299 transitions. Second operand 15 states. [2020-10-05 22:17:49,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:49,651 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-05 22:17:49,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-05 22:17:49,652 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-05 22:17:49,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:49,653 INFO L225 Difference]: With dead ends: 156 [2020-10-05 22:17:49,654 INFO L226 Difference]: Without dead ends: 153 [2020-10-05 22:17:49,654 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:17:49,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-05 22:17:49,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 129. [2020-10-05 22:17:49,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-05 22:17:49,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-10-05 22:17:49,657 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-10-05 22:17:49,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:49,657 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-10-05 22:17:49,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:17:49,657 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-10-05 22:17:49,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:49,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:49,658 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:49,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-10-05 22:17:49,868 INFO L427 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:49,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:49,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1985246760, now seen corresponding path program 16 times [2020-10-05 22:17:49,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:49,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106248869] [2020-10-05 22:17:49,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:49,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:49,967 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:49,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106248869] [2020-10-05 22:17:49,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814287567] [2020-10-05 22:17:49,968 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 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 [2020-10-05 22:17:50,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:17:50,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:50,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:17:50,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:50,123 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:50,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:50,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:17:50,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966189837] [2020-10-05 22:17:50,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:17:50,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:50,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:17:50,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:17:50,124 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-10-05 22:17:50,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:50,187 INFO L93 Difference]: Finished difference Result 170 states and 394 transitions. [2020-10-05 22:17:50,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-05 22:17:50,188 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-05 22:17:50,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:50,189 INFO L225 Difference]: With dead ends: 170 [2020-10-05 22:17:50,189 INFO L226 Difference]: Without dead ends: 167 [2020-10-05 22:17:50,190 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-10-05 22:17:50,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-05 22:17:50,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 129. [2020-10-05 22:17:50,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-05 22:17:50,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-10-05 22:17:50,193 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-10-05 22:17:50,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:50,195 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-10-05 22:17:50,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:17:50,195 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-10-05 22:17:50,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:50,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:50,196 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:50,396 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:50,396 INFO L427 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:50,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:50,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1644785416, now seen corresponding path program 17 times [2020-10-05 22:17:50,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:50,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945687591] [2020-10-05 22:17:50,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:50,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:50,496 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:50,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945687591] [2020-10-05 22:17:50,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319907525] [2020-10-05 22:17:50,496 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 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 [2020-10-05 22:17:50,536 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-05 22:17:50,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:50,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:17:50,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:50,648 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:50,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:50,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:17:50,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552365890] [2020-10-05 22:17:50,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:17:50,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:50,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:17:50,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:17:50,651 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-10-05 22:17:50,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:50,736 INFO L93 Difference]: Finished difference Result 169 states and 394 transitions. [2020-10-05 22:17:50,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-05 22:17:50,736 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-05 22:17:50,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:50,737 INFO L225 Difference]: With dead ends: 169 [2020-10-05 22:17:50,738 INFO L226 Difference]: Without dead ends: 166 [2020-10-05 22:17:50,738 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:17:50,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-05 22:17:50,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 130. [2020-10-05 22:17:50,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-05 22:17:50,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 320 transitions. [2020-10-05 22:17:50,741 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 320 transitions. Word has length 12 [2020-10-05 22:17:50,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:50,741 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 320 transitions. [2020-10-05 22:17:50,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:17:50,741 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 320 transitions. [2020-10-05 22:17:50,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:50,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:50,742 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:50,950 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:50,951 INFO L427 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:50,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:50,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1623335896, now seen corresponding path program 18 times [2020-10-05 22:17:50,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:50,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301373318] [2020-10-05 22:17:50,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:50,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:51,032 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:51,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301373318] [2020-10-05 22:17:51,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421291815] [2020-10-05 22:17:51,033 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 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 [2020-10-05 22:17:51,070 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-05 22:17:51,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:51,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:17:51,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:51,185 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:51,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:51,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:17:51,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490523666] [2020-10-05 22:17:51,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:17:51,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:51,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:17:51,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:17:51,187 INFO L87 Difference]: Start difference. First operand 130 states and 320 transitions. Second operand 15 states. [2020-10-05 22:17:51,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:51,289 INFO L93 Difference]: Finished difference Result 168 states and 394 transitions. [2020-10-05 22:17:51,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-05 22:17:51,290 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-05 22:17:51,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:51,291 INFO L225 Difference]: With dead ends: 168 [2020-10-05 22:17:51,291 INFO L226 Difference]: Without dead ends: 165 [2020-10-05 22:17:51,292 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-10-05 22:17:51,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-05 22:17:51,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 132. [2020-10-05 22:17:51,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-05 22:17:51,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 327 transitions. [2020-10-05 22:17:51,295 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 327 transitions. Word has length 12 [2020-10-05 22:17:51,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:51,296 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 327 transitions. [2020-10-05 22:17:51,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:17:51,296 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 327 transitions. [2020-10-05 22:17:51,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:51,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:51,296 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:51,506 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2020-10-05 22:17:51,507 INFO L427 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:51,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:51,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1622643976, now seen corresponding path program 19 times [2020-10-05 22:17:51,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:51,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366999379] [2020-10-05 22:17:51,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:51,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:51,584 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:51,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366999379] [2020-10-05 22:17:51,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601181725] [2020-10-05 22:17:51,584 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 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 [2020-10-05 22:17:51,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:51,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:17:51,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:51,741 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:51,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:51,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:17:51,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966161469] [2020-10-05 22:17:51,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:17:51,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:51,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:17:51,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:17:51,743 INFO L87 Difference]: Start difference. First operand 132 states and 327 transitions. Second operand 15 states. [2020-10-05 22:17:51,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:51,880 INFO L93 Difference]: Finished difference Result 167 states and 394 transitions. [2020-10-05 22:17:51,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-05 22:17:51,880 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-05 22:17:51,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:51,882 INFO L225 Difference]: With dead ends: 167 [2020-10-05 22:17:51,882 INFO L226 Difference]: Without dead ends: 164 [2020-10-05 22:17:51,882 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-10-05 22:17:51,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-05 22:17:51,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 134. [2020-10-05 22:17:51,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-05 22:17:51,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 334 transitions. [2020-10-05 22:17:51,885 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 334 transitions. Word has length 12 [2020-10-05 22:17:51,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:51,885 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 334 transitions. [2020-10-05 22:17:51,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:17:51,885 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 334 transitions. [2020-10-05 22:17:51,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:17:51,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:51,886 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:52,086 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:52,086 INFO L427 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:52,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:52,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1622621656, now seen corresponding path program 20 times [2020-10-05 22:17:52,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:52,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808228207] [2020-10-05 22:17:52,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:52,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:52,157 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:52,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808228207] [2020-10-05 22:17:52,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511437861] [2020-10-05 22:17:52,158 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 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 [2020-10-05 22:17:52,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:17:52,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:52,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:17:52,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:52,303 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:17:52,314 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:52,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:52,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:17:52,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148347729] [2020-10-05 22:17:52,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:17:52,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:52,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:17:52,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:17:52,316 INFO L87 Difference]: Start difference. First operand 134 states and 334 transitions. Second operand 15 states. [2020-10-05 22:17:52,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:52,512 INFO L93 Difference]: Finished difference Result 176 states and 418 transitions. [2020-10-05 22:17:52,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-05 22:17:52,513 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-05 22:17:52,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:52,515 INFO L225 Difference]: With dead ends: 176 [2020-10-05 22:17:52,515 INFO L226 Difference]: Without dead ends: 170 [2020-10-05 22:17:52,515 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-10-05 22:17:52,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-05 22:17:52,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 132. [2020-10-05 22:17:52,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-05 22:17:52,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-10-05 22:17:52,518 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 12 [2020-10-05 22:17:52,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:52,518 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-10-05 22:17:52,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:17:52,519 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-10-05 22:17:52,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:17:52,519 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:52,519 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:52,720 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:52,720 INFO L427 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:52,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:52,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1730118241, now seen corresponding path program 50 times [2020-10-05 22:17:52,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:52,721 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099267451] [2020-10-05 22:17:52,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:52,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:52,807 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:52,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099267451] [2020-10-05 22:17:52,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151787325] [2020-10-05 22:17:52,807 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 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 [2020-10-05 22:17:52,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:17:52,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:52,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:17:52,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:52,964 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:52,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:52,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:17:52,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926795650] [2020-10-05 22:17:52,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:17:52,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:52,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:17:52,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:17:52,967 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 15 states. [2020-10-05 22:17:53,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:53,022 INFO L93 Difference]: Finished difference Result 163 states and 394 transitions. [2020-10-05 22:17:53,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-05 22:17:53,022 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:17:53,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:53,024 INFO L225 Difference]: With dead ends: 163 [2020-10-05 22:17:53,024 INFO L226 Difference]: Without dead ends: 161 [2020-10-05 22:17:53,024 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:17:53,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-05 22:17:53,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 138. [2020-10-05 22:17:53,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-05 22:17:53,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 350 transitions. [2020-10-05 22:17:53,027 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 350 transitions. Word has length 13 [2020-10-05 22:17:53,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:53,027 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 350 transitions. [2020-10-05 22:17:53,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:17:53,028 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 350 transitions. [2020-10-05 22:17:53,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:17:53,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:53,028 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:53,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2020-10-05 22:17:53,229 INFO L427 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:53,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:53,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1730119202, now seen corresponding path program 51 times [2020-10-05 22:17:53,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:53,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187620180] [2020-10-05 22:17:53,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:53,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:53,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:53,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187620180] [2020-10-05 22:17:53,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079685870] [2020-10-05 22:17:53,314 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 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 [2020-10-05 22:17:53,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-05 22:17:53,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:53,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:17:53,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:53,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:53,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:53,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:17:53,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174975433] [2020-10-05 22:17:53,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:17:53,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:53,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:17:53,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:17:53,479 INFO L87 Difference]: Start difference. First operand 138 states and 350 transitions. Second operand 15 states. [2020-10-05 22:17:53,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:53,634 INFO L93 Difference]: Finished difference Result 172 states and 412 transitions. [2020-10-05 22:17:53,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-05 22:17:53,635 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:17:53,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:53,636 INFO L225 Difference]: With dead ends: 172 [2020-10-05 22:17:53,637 INFO L226 Difference]: Without dead ends: 170 [2020-10-05 22:17:53,637 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2020-10-05 22:17:53,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-05 22:17:53,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 136. [2020-10-05 22:17:53,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-05 22:17:53,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-10-05 22:17:53,642 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-10-05 22:17:53,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:53,642 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-10-05 22:17:53,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:17:53,642 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-10-05 22:17:53,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:17:53,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:53,643 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:53,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:53,854 INFO L427 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:53,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:53,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1730148032, now seen corresponding path program 52 times [2020-10-05 22:17:53,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:53,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896332884] [2020-10-05 22:17:53,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:53,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:53,965 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:53,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896332884] [2020-10-05 22:17:53,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743418917] [2020-10-05 22:17:53,966 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 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 [2020-10-05 22:17:54,027 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:17:54,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:54,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:17:54,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:55,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:55,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:55,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:17:55,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554883032] [2020-10-05 22:17:55,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:17:55,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:55,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:17:55,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:17:55,077 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-10-05 22:17:55,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:55,269 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-10-05 22:17:55,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-05 22:17:55,269 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:17:55,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:55,271 INFO L225 Difference]: With dead ends: 179 [2020-10-05 22:17:55,271 INFO L226 Difference]: Without dead ends: 177 [2020-10-05 22:17:55,271 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2020-10-05 22:17:55,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-05 22:17:55,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 134. [2020-10-05 22:17:55,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-05 22:17:55,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 338 transitions. [2020-10-05 22:17:55,275 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 338 transitions. Word has length 13 [2020-10-05 22:17:55,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:55,275 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 338 transitions. [2020-10-05 22:17:55,275 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:17:55,275 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 338 transitions. [2020-10-05 22:17:55,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:17:55,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:55,276 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:55,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-10-05 22:17:55,485 INFO L427 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:55,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:55,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1731041762, now seen corresponding path program 53 times [2020-10-05 22:17:55,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:55,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105776408] [2020-10-05 22:17:55,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:55,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:55,564 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:55,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105776408] [2020-10-05 22:17:55,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310095704] [2020-10-05 22:17:55,565 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 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 [2020-10-05 22:17:55,603 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:17:55,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:55,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:17:55,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:55,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:55,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:55,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:17:55,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614501720] [2020-10-05 22:17:55,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:17:55,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:55,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:17:55,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:17:55,718 INFO L87 Difference]: Start difference. First operand 134 states and 338 transitions. Second operand 15 states. [2020-10-05 22:17:55,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:55,897 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-10-05 22:17:55,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-05 22:17:55,898 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:17:55,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:55,899 INFO L225 Difference]: With dead ends: 179 [2020-10-05 22:17:55,899 INFO L226 Difference]: Without dead ends: 177 [2020-10-05 22:17:55,900 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2020-10-05 22:17:55,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-05 22:17:55,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 136. [2020-10-05 22:17:55,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-05 22:17:55,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-10-05 22:17:55,903 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-10-05 22:17:55,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:55,904 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-10-05 22:17:55,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:17:55,904 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-10-05 22:17:55,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:17:55,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:55,904 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:56,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-10-05 22:17:56,111 INFO L427 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:56,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:56,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1731042723, now seen corresponding path program 54 times [2020-10-05 22:17:56,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:56,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368455361] [2020-10-05 22:17:56,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:56,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:56,184 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:56,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368455361] [2020-10-05 22:17:56,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176830535] [2020-10-05 22:17:56,185 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 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 [2020-10-05 22:17:56,261 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-05 22:17:56,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:56,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:17:56,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:56,352 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:56,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:56,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:17:56,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912274835] [2020-10-05 22:17:56,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:17:56,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:56,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:17:56,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:17:56,354 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-10-05 22:17:56,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:56,560 INFO L93 Difference]: Finished difference Result 184 states and 436 transitions. [2020-10-05 22:17:56,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-05 22:17:56,561 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:17:56,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:56,562 INFO L225 Difference]: With dead ends: 184 [2020-10-05 22:17:56,562 INFO L226 Difference]: Without dead ends: 182 [2020-10-05 22:17:56,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-05 22:17:56,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-05 22:17:56,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 136. [2020-10-05 22:17:56,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-05 22:17:56,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 342 transitions. [2020-10-05 22:17:56,566 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 342 transitions. Word has length 13 [2020-10-05 22:17:56,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:56,566 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 342 transitions. [2020-10-05 22:17:56,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:17:56,566 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 342 transitions. [2020-10-05 22:17:56,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:17:56,567 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:56,567 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:56,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2020-10-05 22:17:56,774 INFO L427 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:56,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:56,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1731071553, now seen corresponding path program 55 times [2020-10-05 22:17:56,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:56,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576865941] [2020-10-05 22:17:56,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:56,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:56,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:56,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576865941] [2020-10-05 22:17:56,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782117516] [2020-10-05 22:17:56,864 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 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 [2020-10-05 22:17:56,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:56,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:17:56,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:57,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:57,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:57,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:17:57,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868117653] [2020-10-05 22:17:57,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:17:57,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:57,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:17:57,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:17:57,029 INFO L87 Difference]: Start difference. First operand 136 states and 342 transitions. Second operand 15 states. [2020-10-05 22:17:57,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:57,250 INFO L93 Difference]: Finished difference Result 179 states and 427 transitions. [2020-10-05 22:17:57,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-05 22:17:57,251 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:17:57,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:57,252 INFO L225 Difference]: With dead ends: 179 [2020-10-05 22:17:57,252 INFO L226 Difference]: Without dead ends: 177 [2020-10-05 22:17:57,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-05 22:17:57,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-05 22:17:57,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 135. [2020-10-05 22:17:57,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-05 22:17:57,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 339 transitions. [2020-10-05 22:17:57,256 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 339 transitions. Word has length 13 [2020-10-05 22:17:57,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:57,256 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 339 transitions. [2020-10-05 22:17:57,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:17:57,256 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 339 transitions. [2020-10-05 22:17:57,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:17:57,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:57,257 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:57,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:57,468 INFO L427 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:57,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:57,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1758747392, now seen corresponding path program 56 times [2020-10-05 22:17:57,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:57,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778530595] [2020-10-05 22:17:57,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:57,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:57,543 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:57,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778530595] [2020-10-05 22:17:57,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158511041] [2020-10-05 22:17:57,544 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 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 [2020-10-05 22:17:57,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:17:57,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:57,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:17:57,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:57,708 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:57,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:57,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:17:57,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272153099] [2020-10-05 22:17:57,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:17:57,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:57,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:17:57,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:17:57,710 INFO L87 Difference]: Start difference. First operand 135 states and 339 transitions. Second operand 15 states. [2020-10-05 22:17:57,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:57,850 INFO L93 Difference]: Finished difference Result 176 states and 421 transitions. [2020-10-05 22:17:57,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-05 22:17:57,851 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:17:57,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:57,852 INFO L225 Difference]: With dead ends: 176 [2020-10-05 22:17:57,852 INFO L226 Difference]: Without dead ends: 174 [2020-10-05 22:17:57,852 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-10-05 22:17:57,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-05 22:17:57,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 139. [2020-10-05 22:17:57,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-05 22:17:57,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 350 transitions. [2020-10-05 22:17:57,856 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 350 transitions. Word has length 13 [2020-10-05 22:17:57,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:57,856 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 350 transitions. [2020-10-05 22:17:57,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:17:57,856 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 350 transitions. [2020-10-05 22:17:57,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:17:57,857 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:57,857 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:58,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:58,065 INFO L427 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:58,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:58,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1758748353, now seen corresponding path program 57 times [2020-10-05 22:17:58,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:58,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183286800] [2020-10-05 22:17:58,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:58,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:58,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:58,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183286800] [2020-10-05 22:17:58,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38395178] [2020-10-05 22:17:58,144 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 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 [2020-10-05 22:17:58,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-05 22:17:58,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:58,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:17:58,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:58,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:58,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:58,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:17:58,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154639028] [2020-10-05 22:17:58,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:17:58,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:58,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:17:58,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:17:58,367 INFO L87 Difference]: Start difference. First operand 139 states and 350 transitions. Second operand 15 states. [2020-10-05 22:17:58,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:58,557 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-10-05 22:17:58,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-05 22:17:58,557 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:17:58,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:58,558 INFO L225 Difference]: With dead ends: 185 [2020-10-05 22:17:58,559 INFO L226 Difference]: Without dead ends: 183 [2020-10-05 22:17:58,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-05 22:17:58,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-05 22:17:58,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 140. [2020-10-05 22:17:58,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-05 22:17:58,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 352 transitions. [2020-10-05 22:17:58,562 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 352 transitions. Word has length 13 [2020-10-05 22:17:58,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:58,563 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 352 transitions. [2020-10-05 22:17:58,563 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:17:58,563 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 352 transitions. [2020-10-05 22:17:58,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:17:58,563 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:58,563 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:58,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:58,772 INFO L427 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:58,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:58,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1758777183, now seen corresponding path program 58 times [2020-10-05 22:17:58,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:58,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288756430] [2020-10-05 22:17:58,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:58,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:58,875 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:58,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288756430] [2020-10-05 22:17:58,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007939821] [2020-10-05 22:17:58,876 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 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 [2020-10-05 22:17:58,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:17:58,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:58,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:17:58,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:59,046 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:59,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:59,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:17:59,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57022184] [2020-10-05 22:17:59,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:17:59,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:59,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:17:59,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:17:59,048 INFO L87 Difference]: Start difference. First operand 140 states and 352 transitions. Second operand 15 states. [2020-10-05 22:17:59,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:59,254 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-10-05 22:17:59,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-05 22:17:59,254 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:17:59,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:59,256 INFO L225 Difference]: With dead ends: 185 [2020-10-05 22:17:59,256 INFO L226 Difference]: Without dead ends: 183 [2020-10-05 22:17:59,256 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-05 22:17:59,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-05 22:17:59,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 138. [2020-10-05 22:17:59,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-05 22:17:59,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 345 transitions. [2020-10-05 22:17:59,259 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 345 transitions. Word has length 13 [2020-10-05 22:17:59,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:59,259 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 345 transitions. [2020-10-05 22:17:59,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:17:59,259 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 345 transitions. [2020-10-05 22:17:59,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:17:59,260 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:59,260 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:17:59,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:17:59,462 INFO L427 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:17:59,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:17:59,463 INFO L82 PathProgramCache]: Analyzing trace with hash 9395951, now seen corresponding path program 59 times [2020-10-05 22:17:59,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:17:59,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909386035] [2020-10-05 22:17:59,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:17:59,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:17:59,577 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:59,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909386035] [2020-10-05 22:17:59,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404795420] [2020-10-05 22:17:59,578 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 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 [2020-10-05 22:17:59,615 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-05 22:17:59,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:17:59,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:17:59,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:17:59,728 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:17:59,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:17:59,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:17:59,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75518762] [2020-10-05 22:17:59,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:17:59,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:17:59,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:17:59,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:17:59,730 INFO L87 Difference]: Start difference. First operand 138 states and 345 transitions. Second operand 15 states. [2020-10-05 22:17:59,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:17:59,796 INFO L93 Difference]: Finished difference Result 182 states and 432 transitions. [2020-10-05 22:17:59,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-05 22:17:59,796 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:17:59,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:17:59,797 INFO L225 Difference]: With dead ends: 182 [2020-10-05 22:17:59,798 INFO L226 Difference]: Without dead ends: 180 [2020-10-05 22:17:59,798 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-10-05 22:17:59,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-05 22:17:59,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 144. [2020-10-05 22:17:59,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-05 22:17:59,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 363 transitions. [2020-10-05 22:17:59,801 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 363 transitions. Word has length 13 [2020-10-05 22:17:59,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:17:59,802 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 363 transitions. [2020-10-05 22:17:59,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:17:59,802 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 363 transitions. [2020-10-05 22:17:59,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:17:59,803 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:17:59,803 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:00,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2020-10-05 22:18:00,011 INFO L427 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:00,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:00,012 INFO L82 PathProgramCache]: Analyzing trace with hash 9396912, now seen corresponding path program 60 times [2020-10-05 22:18:00,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:00,013 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974551505] [2020-10-05 22:18:00,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:00,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:00,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:00,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974551505] [2020-10-05 22:18:00,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82691242] [2020-10-05 22:18:00,122 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 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 [2020-10-05 22:18:00,162 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-05 22:18:00,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:18:00,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:00,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:00,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:00,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:00,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:00,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230043516] [2020-10-05 22:18:00,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:00,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:00,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:00,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:00,292 INFO L87 Difference]: Start difference. First operand 144 states and 363 transitions. Second operand 15 states. [2020-10-05 22:18:00,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:00,467 INFO L93 Difference]: Finished difference Result 185 states and 437 transitions. [2020-10-05 22:18:00,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-05 22:18:00,468 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:00,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:00,469 INFO L225 Difference]: With dead ends: 185 [2020-10-05 22:18:00,469 INFO L226 Difference]: Without dead ends: 183 [2020-10-05 22:18:00,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-10-05 22:18:00,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-05 22:18:00,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 142. [2020-10-05 22:18:00,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-05 22:18:00,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-10-05 22:18:00,473 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-10-05 22:18:00,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:00,473 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-10-05 22:18:00,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:00,473 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-10-05 22:18:00,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:00,474 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:00,474 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:00,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:00,675 INFO L427 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:00,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:00,675 INFO L82 PathProgramCache]: Analyzing trace with hash 9425742, now seen corresponding path program 61 times [2020-10-05 22:18:00,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:00,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617385012] [2020-10-05 22:18:00,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:00,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:00,757 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:00,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617385012] [2020-10-05 22:18:00,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463793985] [2020-10-05 22:18:00,758 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 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 [2020-10-05 22:18:00,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:00,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:00,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:00,977 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:00,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:00,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:00,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385879208] [2020-10-05 22:18:00,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:00,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:00,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:00,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:00,979 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-10-05 22:18:01,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:01,208 INFO L93 Difference]: Finished difference Result 191 states and 449 transitions. [2020-10-05 22:18:01,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-05 22:18:01,208 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:01,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:01,210 INFO L225 Difference]: With dead ends: 191 [2020-10-05 22:18:01,210 INFO L226 Difference]: Without dead ends: 189 [2020-10-05 22:18:01,210 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-10-05 22:18:01,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-05 22:18:01,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 140. [2020-10-05 22:18:01,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-05 22:18:01,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 351 transitions. [2020-10-05 22:18:01,216 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 351 transitions. Word has length 13 [2020-10-05 22:18:01,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:01,217 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 351 transitions. [2020-10-05 22:18:01,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:01,217 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 351 transitions. [2020-10-05 22:18:01,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:01,217 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:01,217 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:01,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:01,418 INFO L427 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:01,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:01,419 INFO L82 PathProgramCache]: Analyzing trace with hash 10319472, now seen corresponding path program 62 times [2020-10-05 22:18:01,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:01,419 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381533852] [2020-10-05 22:18:01,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:01,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:01,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:01,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381533852] [2020-10-05 22:18:01,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685589437] [2020-10-05 22:18:01,501 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 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 [2020-10-05 22:18:01,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:18:01,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:18:01,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:01,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:01,657 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:01,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:01,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:01,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596260474] [2020-10-05 22:18:01,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:01,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:01,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:01,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:01,659 INFO L87 Difference]: Start difference. First operand 140 states and 351 transitions. Second operand 15 states. [2020-10-05 22:18:01,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:01,888 INFO L93 Difference]: Finished difference Result 187 states and 441 transitions. [2020-10-05 22:18:01,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-05 22:18:01,889 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:01,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:01,891 INFO L225 Difference]: With dead ends: 187 [2020-10-05 22:18:01,891 INFO L226 Difference]: Without dead ends: 185 [2020-10-05 22:18:01,891 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2020-10-05 22:18:01,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-05 22:18:01,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 142. [2020-10-05 22:18:01,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-05 22:18:01,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-10-05 22:18:01,895 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-10-05 22:18:01,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:01,895 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-10-05 22:18:01,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:01,896 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-10-05 22:18:01,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:01,896 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:01,896 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:02,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2020-10-05 22:18:02,097 INFO L427 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:02,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:02,098 INFO L82 PathProgramCache]: Analyzing trace with hash 10320433, now seen corresponding path program 63 times [2020-10-05 22:18:02,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:02,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216542828] [2020-10-05 22:18:02,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:02,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:02,175 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:02,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216542828] [2020-10-05 22:18:02,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541754613] [2020-10-05 22:18:02,176 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 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 [2020-10-05 22:18:02,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-05 22:18:02,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:18:02,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:02,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:02,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:02,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:02,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:02,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310331697] [2020-10-05 22:18:02,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:02,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:02,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:02,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:02,322 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-10-05 22:18:02,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:02,563 INFO L93 Difference]: Finished difference Result 198 states and 463 transitions. [2020-10-05 22:18:02,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 22:18:02,564 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:02,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:02,566 INFO L225 Difference]: With dead ends: 198 [2020-10-05 22:18:02,566 INFO L226 Difference]: Without dead ends: 196 [2020-10-05 22:18:02,567 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-10-05 22:18:02,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-05 22:18:02,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 142. [2020-10-05 22:18:02,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-05 22:18:02,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 356 transitions. [2020-10-05 22:18:02,570 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 356 transitions. Word has length 13 [2020-10-05 22:18:02,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:02,571 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 356 transitions. [2020-10-05 22:18:02,571 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:02,571 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 356 transitions. [2020-10-05 22:18:02,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:02,571 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:02,572 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:02,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:02,778 INFO L427 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:02,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:02,778 INFO L82 PathProgramCache]: Analyzing trace with hash 10349263, now seen corresponding path program 64 times [2020-10-05 22:18:02,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:02,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793588997] [2020-10-05 22:18:02,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:02,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:02,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:02,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793588997] [2020-10-05 22:18:02,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028947876] [2020-10-05 22:18:02,850 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 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 [2020-10-05 22:18:02,888 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:18:02,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:18:02,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:02,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:03,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:03,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:03,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:03,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38215942] [2020-10-05 22:18:03,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:03,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:03,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:03,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:03,011 INFO L87 Difference]: Start difference. First operand 142 states and 356 transitions. Second operand 15 states. [2020-10-05 22:18:03,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:03,270 INFO L93 Difference]: Finished difference Result 189 states and 446 transitions. [2020-10-05 22:18:03,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 22:18:03,271 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:03,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:03,273 INFO L225 Difference]: With dead ends: 189 [2020-10-05 22:18:03,273 INFO L226 Difference]: Without dead ends: 187 [2020-10-05 22:18:03,273 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-10-05 22:18:03,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-05 22:18:03,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 139. [2020-10-05 22:18:03,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-05 22:18:03,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 347 transitions. [2020-10-05 22:18:03,276 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 347 transitions. Word has length 13 [2020-10-05 22:18:03,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:03,276 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 347 transitions. [2020-10-05 22:18:03,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:03,277 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 347 transitions. [2020-10-05 22:18:03,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:03,277 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:03,277 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:03,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-10-05 22:18:03,485 INFO L427 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:03,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:03,485 INFO L82 PathProgramCache]: Analyzing trace with hash 646625441, now seen corresponding path program 65 times [2020-10-05 22:18:03,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:03,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916409842] [2020-10-05 22:18:03,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:03,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:03,591 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:03,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916409842] [2020-10-05 22:18:03,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175353083] [2020-10-05 22:18:03,592 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 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 [2020-10-05 22:18:03,631 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-05 22:18:03,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:18:03,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:03,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:03,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:03,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:03,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:03,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89678841] [2020-10-05 22:18:03,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:03,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:03,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:03,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:03,752 INFO L87 Difference]: Start difference. First operand 139 states and 347 transitions. Second operand 15 states. [2020-10-05 22:18:03,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:03,839 INFO L93 Difference]: Finished difference Result 178 states and 423 transitions. [2020-10-05 22:18:03,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-05 22:18:03,840 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:03,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:03,841 INFO L225 Difference]: With dead ends: 178 [2020-10-05 22:18:03,842 INFO L226 Difference]: Without dead ends: 176 [2020-10-05 22:18:03,842 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:18:03,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-05 22:18:03,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 143. [2020-10-05 22:18:03,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-05 22:18:03,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 359 transitions. [2020-10-05 22:18:03,845 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 359 transitions. Word has length 13 [2020-10-05 22:18:03,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:03,845 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 359 transitions. [2020-10-05 22:18:03,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:03,846 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 359 transitions. [2020-10-05 22:18:03,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:03,846 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:03,846 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:04,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:04,047 INFO L427 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:04,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:04,048 INFO L82 PathProgramCache]: Analyzing trace with hash 646626402, now seen corresponding path program 66 times [2020-10-05 22:18:04,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:04,048 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818030589] [2020-10-05 22:18:04,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:04,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:04,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:04,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818030589] [2020-10-05 22:18:04,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492570959] [2020-10-05 22:18:04,138 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 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 [2020-10-05 22:18:04,175 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-05 22:18:04,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:18:04,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:04,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:04,299 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:04,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:04,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:04,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233613696] [2020-10-05 22:18:04,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:04,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:04,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:04,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:04,301 INFO L87 Difference]: Start difference. First operand 143 states and 359 transitions. Second operand 15 states. [2020-10-05 22:18:04,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:04,478 INFO L93 Difference]: Finished difference Result 193 states and 452 transitions. [2020-10-05 22:18:04,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-05 22:18:04,478 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:04,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:04,480 INFO L225 Difference]: With dead ends: 193 [2020-10-05 22:18:04,480 INFO L226 Difference]: Without dead ends: 191 [2020-10-05 22:18:04,480 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-10-05 22:18:04,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-05 22:18:04,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 141. [2020-10-05 22:18:04,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-05 22:18:04,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 353 transitions. [2020-10-05 22:18:04,483 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 353 transitions. Word has length 13 [2020-10-05 22:18:04,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:04,483 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 353 transitions. [2020-10-05 22:18:04,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:04,484 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 353 transitions. [2020-10-05 22:18:04,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:04,484 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:04,484 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:04,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2020-10-05 22:18:04,685 INFO L427 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:04,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:04,686 INFO L82 PathProgramCache]: Analyzing trace with hash 646655232, now seen corresponding path program 67 times [2020-10-05 22:18:04,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:04,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452931400] [2020-10-05 22:18:04,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:04,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:04,763 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:04,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452931400] [2020-10-05 22:18:04,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459501671] [2020-10-05 22:18:04,764 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 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 [2020-10-05 22:18:04,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:04,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:04,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:04,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:04,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:04,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:04,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112406288] [2020-10-05 22:18:04,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:04,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:04,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:04,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:04,957 INFO L87 Difference]: Start difference. First operand 141 states and 353 transitions. Second operand 15 states. [2020-10-05 22:18:05,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:05,217 INFO L93 Difference]: Finished difference Result 195 states and 456 transitions. [2020-10-05 22:18:05,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-05 22:18:05,217 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:05,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:05,219 INFO L225 Difference]: With dead ends: 195 [2020-10-05 22:18:05,219 INFO L226 Difference]: Without dead ends: 193 [2020-10-05 22:18:05,219 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2020-10-05 22:18:05,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-05 22:18:05,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 140. [2020-10-05 22:18:05,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-05 22:18:05,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 349 transitions. [2020-10-05 22:18:05,222 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 349 transitions. Word has length 13 [2020-10-05 22:18:05,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:05,222 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 349 transitions. [2020-10-05 22:18:05,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:05,222 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 349 transitions. [2020-10-05 22:18:05,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:05,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:05,222 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:05,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:05,423 INFO L427 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:05,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:05,424 INFO L82 PathProgramCache]: Analyzing trace with hash 667181231, now seen corresponding path program 68 times [2020-10-05 22:18:05,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:05,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612556005] [2020-10-05 22:18:05,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:05,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:05,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:05,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612556005] [2020-10-05 22:18:05,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732381734] [2020-10-05 22:18:05,513 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 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 [2020-10-05 22:18:05,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:18:05,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:18:05,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:05,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:05,678 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:05,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:05,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:05,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593217876] [2020-10-05 22:18:05,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:05,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:05,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:05,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:05,680 INFO L87 Difference]: Start difference. First operand 140 states and 349 transitions. Second operand 15 states. [2020-10-05 22:18:05,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:05,790 INFO L93 Difference]: Finished difference Result 174 states and 414 transitions. [2020-10-05 22:18:05,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-05 22:18:05,791 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:05,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:05,792 INFO L225 Difference]: With dead ends: 174 [2020-10-05 22:18:05,792 INFO L226 Difference]: Without dead ends: 172 [2020-10-05 22:18:05,793 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-10-05 22:18:05,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-05 22:18:05,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 142. [2020-10-05 22:18:05,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-05 22:18:05,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 355 transitions. [2020-10-05 22:18:05,795 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 355 transitions. Word has length 13 [2020-10-05 22:18:05,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:05,796 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 355 transitions. [2020-10-05 22:18:05,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:05,796 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 355 transitions. [2020-10-05 22:18:05,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:05,796 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:05,796 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:05,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2020-10-05 22:18:05,997 INFO L427 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:05,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:05,998 INFO L82 PathProgramCache]: Analyzing trace with hash 667182192, now seen corresponding path program 69 times [2020-10-05 22:18:05,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:05,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194060591] [2020-10-05 22:18:05,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:06,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:06,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:06,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194060591] [2020-10-05 22:18:06,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219594974] [2020-10-05 22:18:06,077 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 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 [2020-10-05 22:18:06,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-05 22:18:06,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:18:06,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:06,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:06,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:06,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:06,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:06,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033296615] [2020-10-05 22:18:06,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:06,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:06,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:06,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:06,252 INFO L87 Difference]: Start difference. First operand 142 states and 355 transitions. Second operand 15 states. [2020-10-05 22:18:06,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:06,477 INFO L93 Difference]: Finished difference Result 189 states and 443 transitions. [2020-10-05 22:18:06,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 22:18:06,478 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:06,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:06,479 INFO L225 Difference]: With dead ends: 189 [2020-10-05 22:18:06,479 INFO L226 Difference]: Without dead ends: 187 [2020-10-05 22:18:06,480 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-10-05 22:18:06,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-05 22:18:06,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 141. [2020-10-05 22:18:06,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-05 22:18:06,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 351 transitions. [2020-10-05 22:18:06,483 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 351 transitions. Word has length 13 [2020-10-05 22:18:06,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:06,483 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 351 transitions. [2020-10-05 22:18:06,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:06,483 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 351 transitions. [2020-10-05 22:18:06,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:06,484 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:06,484 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:06,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:06,685 INFO L427 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:06,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:06,685 INFO L82 PathProgramCache]: Analyzing trace with hash 667844321, now seen corresponding path program 70 times [2020-10-05 22:18:06,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:06,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833760803] [2020-10-05 22:18:06,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:06,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:06,763 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:06,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833760803] [2020-10-05 22:18:06,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103164571] [2020-10-05 22:18:06,764 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 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 [2020-10-05 22:18:06,803 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:18:06,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:18:06,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:06,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:06,920 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:06,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:06,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:06,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397397589] [2020-10-05 22:18:06,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:06,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:06,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:06,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:06,922 INFO L87 Difference]: Start difference. First operand 141 states and 351 transitions. Second operand 15 states. [2020-10-05 22:18:07,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:07,056 INFO L93 Difference]: Finished difference Result 175 states and 413 transitions. [2020-10-05 22:18:07,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-05 22:18:07,057 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:07,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:07,058 INFO L225 Difference]: With dead ends: 175 [2020-10-05 22:18:07,058 INFO L226 Difference]: Without dead ends: 173 [2020-10-05 22:18:07,058 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-10-05 22:18:07,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-05 22:18:07,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 145. [2020-10-05 22:18:07,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-05 22:18:07,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-05 22:18:07,062 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-05 22:18:07,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:07,062 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-05 22:18:07,062 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:07,062 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-05 22:18:07,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:07,063 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:07,063 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:07,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:07,265 INFO L427 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:07,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:07,265 INFO L82 PathProgramCache]: Analyzing trace with hash 667866641, now seen corresponding path program 71 times [2020-10-05 22:18:07,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:07,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62051866] [2020-10-05 22:18:07,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:07,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:07,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:07,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62051866] [2020-10-05 22:18:07,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385146255] [2020-10-05 22:18:07,333 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 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 [2020-10-05 22:18:07,371 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-05 22:18:07,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:18:07,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:07,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:07,472 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:18:07,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:07,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:07,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:07,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810984564] [2020-10-05 22:18:07,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:07,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:07,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:07,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:07,507 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-05 22:18:07,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:07,840 INFO L93 Difference]: Finished difference Result 195 states and 464 transitions. [2020-10-05 22:18:07,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-05 22:18:07,841 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:07,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:07,842 INFO L225 Difference]: With dead ends: 195 [2020-10-05 22:18:07,842 INFO L226 Difference]: Without dead ends: 190 [2020-10-05 22:18:07,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-10-05 22:18:07,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-05 22:18:07,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 143. [2020-10-05 22:18:07,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-05 22:18:07,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-10-05 22:18:07,846 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-10-05 22:18:07,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:07,846 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-10-05 22:18:07,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:07,846 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-10-05 22:18:07,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:07,846 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:07,846 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:08,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:08,047 INFO L427 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:08,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:08,048 INFO L82 PathProgramCache]: Analyzing trace with hash 667874112, now seen corresponding path program 72 times [2020-10-05 22:18:08,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:08,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113269612] [2020-10-05 22:18:08,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:08,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:08,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:08,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113269612] [2020-10-05 22:18:08,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287960455] [2020-10-05 22:18:08,119 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 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 [2020-10-05 22:18:08,155 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-05 22:18:08,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:18:08,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:08,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:08,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:08,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:08,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:08,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970518968] [2020-10-05 22:18:08,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:08,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:08,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:08,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:08,287 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-10-05 22:18:08,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:08,532 INFO L93 Difference]: Finished difference Result 187 states and 442 transitions. [2020-10-05 22:18:08,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-05 22:18:08,533 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:08,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:08,534 INFO L225 Difference]: With dead ends: 187 [2020-10-05 22:18:08,535 INFO L226 Difference]: Without dead ends: 185 [2020-10-05 22:18:08,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-05 22:18:08,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-05 22:18:08,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 145. [2020-10-05 22:18:08,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-05 22:18:08,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-05 22:18:08,542 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-05 22:18:08,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:08,542 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-05 22:18:08,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:08,542 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-05 22:18:08,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:08,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:08,543 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:08,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:08,752 INFO L427 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:08,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:08,752 INFO L82 PathProgramCache]: Analyzing trace with hash 667895471, now seen corresponding path program 73 times [2020-10-05 22:18:08,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:08,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129529249] [2020-10-05 22:18:08,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:08,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:08,822 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:08,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129529249] [2020-10-05 22:18:08,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144349758] [2020-10-05 22:18:08,823 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 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 [2020-10-05 22:18:08,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:08,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:08,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:08,973 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:18:09,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:09,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:09,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:09,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111719129] [2020-10-05 22:18:09,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:09,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:09,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:09,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:09,003 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-05 22:18:09,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:09,426 INFO L93 Difference]: Finished difference Result 212 states and 503 transitions. [2020-10-05 22:18:09,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-05 22:18:09,427 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:09,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:09,429 INFO L225 Difference]: With dead ends: 212 [2020-10-05 22:18:09,429 INFO L226 Difference]: Without dead ends: 207 [2020-10-05 22:18:09,429 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2020-10-05 22:18:09,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-05 22:18:09,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-10-05 22:18:09,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-05 22:18:09,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-05 22:18:09,432 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-05 22:18:09,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:09,433 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-05 22:18:09,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:09,433 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-05 22:18:09,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:09,433 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:09,433 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:09,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2020-10-05 22:18:09,634 INFO L427 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:09,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:09,635 INFO L82 PathProgramCache]: Analyzing trace with hash 667896432, now seen corresponding path program 74 times [2020-10-05 22:18:09,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:09,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452390159] [2020-10-05 22:18:09,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:09,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:09,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:09,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452390159] [2020-10-05 22:18:09,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473112936] [2020-10-05 22:18:09,704 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 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 [2020-10-05 22:18:09,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:18:09,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:18:09,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:09,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:09,847 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:18:09,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:09,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:09,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:09,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461897697] [2020-10-05 22:18:09,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:09,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:09,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:09,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:09,870 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-05 22:18:10,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:10,196 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-10-05 22:18:10,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-05 22:18:10,196 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:10,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:10,198 INFO L225 Difference]: With dead ends: 202 [2020-10-05 22:18:10,198 INFO L226 Difference]: Without dead ends: 197 [2020-10-05 22:18:10,198 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-10-05 22:18:10,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-05 22:18:10,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 141. [2020-10-05 22:18:10,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-05 22:18:10,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 343 transitions. [2020-10-05 22:18:10,202 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 343 transitions. Word has length 13 [2020-10-05 22:18:10,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:10,202 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 343 transitions. [2020-10-05 22:18:10,202 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:10,202 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 343 transitions. [2020-10-05 22:18:10,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:10,203 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:10,203 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:10,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:10,403 INFO L427 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:10,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:10,404 INFO L82 PathProgramCache]: Analyzing trace with hash 668104752, now seen corresponding path program 75 times [2020-10-05 22:18:10,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:10,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835621805] [2020-10-05 22:18:10,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:10,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:10,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:10,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835621805] [2020-10-05 22:18:10,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409971330] [2020-10-05 22:18:10,468 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:10,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-05 22:18:10,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:18:10,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:10,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:10,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:10,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:10,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:10,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765231703] [2020-10-05 22:18:10,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:10,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:10,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:10,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:10,734 INFO L87 Difference]: Start difference. First operand 141 states and 343 transitions. Second operand 15 states. [2020-10-05 22:18:11,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:11,017 INFO L93 Difference]: Finished difference Result 198 states and 460 transitions. [2020-10-05 22:18:11,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-05 22:18:11,017 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:11,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:11,019 INFO L225 Difference]: With dead ends: 198 [2020-10-05 22:18:11,019 INFO L226 Difference]: Without dead ends: 196 [2020-10-05 22:18:11,020 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2020-10-05 22:18:11,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-05 22:18:11,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 143. [2020-10-05 22:18:11,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-05 22:18:11,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-10-05 22:18:11,023 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-10-05 22:18:11,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:11,024 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-10-05 22:18:11,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:11,024 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-10-05 22:18:11,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:11,025 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:11,025 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:11,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-10-05 22:18:11,226 INFO L427 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:11,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:11,227 INFO L82 PathProgramCache]: Analyzing trace with hash 668767842, now seen corresponding path program 76 times [2020-10-05 22:18:11,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:11,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509915357] [2020-10-05 22:18:11,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:11,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:11,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:11,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509915357] [2020-10-05 22:18:11,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251860764] [2020-10-05 22:18:11,297 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:11,335 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:18:11,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:18:11,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:11,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:11,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:11,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:11,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:11,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259884279] [2020-10-05 22:18:11,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:11,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:11,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:11,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:11,502 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-10-05 22:18:11,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:11,892 INFO L93 Difference]: Finished difference Result 209 states and 491 transitions. [2020-10-05 22:18:11,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-05 22:18:11,893 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:11,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:11,894 INFO L225 Difference]: With dead ends: 209 [2020-10-05 22:18:11,895 INFO L226 Difference]: Without dead ends: 207 [2020-10-05 22:18:11,895 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=206, Invalid=444, Unknown=0, NotChecked=0, Total=650 [2020-10-05 22:18:11,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-05 22:18:11,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-10-05 22:18:11,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-05 22:18:11,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-05 22:18:11,899 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-05 22:18:11,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:11,899 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-05 22:18:11,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:11,899 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-05 22:18:11,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:11,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:11,899 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:12,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-10-05 22:18:12,100 INFO L427 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:12,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:12,101 INFO L82 PathProgramCache]: Analyzing trace with hash 668789201, now seen corresponding path program 77 times [2020-10-05 22:18:12,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:12,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171530506] [2020-10-05 22:18:12,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:12,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:12,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:12,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171530506] [2020-10-05 22:18:12,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177122534] [2020-10-05 22:18:12,170 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:12,206 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-05 22:18:12,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:18:12,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:12,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:12,321 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:18:12,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:12,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:12,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:12,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989968036] [2020-10-05 22:18:12,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:12,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:12,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:12,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:12,358 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-05 22:18:12,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:12,876 INFO L93 Difference]: Finished difference Result 217 states and 518 transitions. [2020-10-05 22:18:12,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-05 22:18:12,877 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:12,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:12,878 INFO L225 Difference]: With dead ends: 217 [2020-10-05 22:18:12,878 INFO L226 Difference]: Without dead ends: 212 [2020-10-05 22:18:12,879 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=289, Invalid=581, Unknown=0, NotChecked=0, Total=870 [2020-10-05 22:18:12,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-05 22:18:12,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 146. [2020-10-05 22:18:12,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-05 22:18:12,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 362 transitions. [2020-10-05 22:18:12,883 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 362 transitions. Word has length 13 [2020-10-05 22:18:12,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:12,883 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 362 transitions. [2020-10-05 22:18:12,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:12,884 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 362 transitions. [2020-10-05 22:18:12,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:12,884 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:12,884 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:13,090 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2020-10-05 22:18:13,091 INFO L427 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:13,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:13,091 INFO L82 PathProgramCache]: Analyzing trace with hash 668790162, now seen corresponding path program 78 times [2020-10-05 22:18:13,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:13,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244523980] [2020-10-05 22:18:13,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:13,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:13,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:13,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244523980] [2020-10-05 22:18:13,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494469123] [2020-10-05 22:18:13,164 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:13,204 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-05 22:18:13,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:18:13,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:13,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:15,368 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:18:15,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:15,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:15,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:15,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709039204] [2020-10-05 22:18:15,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:15,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:15,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:15,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=142, Unknown=1, NotChecked=0, Total=210 [2020-10-05 22:18:15,409 INFO L87 Difference]: Start difference. First operand 146 states and 362 transitions. Second operand 15 states. [2020-10-05 22:18:19,702 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-05 22:18:23,923 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-10-05 22:18:24,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:24,401 INFO L93 Difference]: Finished difference Result 236 states and 562 transitions. [2020-10-05 22:18:24,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-05 22:18:24,402 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:24,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:24,403 INFO L225 Difference]: With dead ends: 236 [2020-10-05 22:18:24,404 INFO L226 Difference]: Without dead ends: 228 [2020-10-05 22:18:24,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=293, Invalid=636, Unknown=1, NotChecked=0, Total=930 [2020-10-05 22:18:24,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-05 22:18:24,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 141. [2020-10-05 22:18:24,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-05 22:18:24,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 346 transitions. [2020-10-05 22:18:24,407 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 346 transitions. Word has length 13 [2020-10-05 22:18:24,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:24,407 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 346 transitions. [2020-10-05 22:18:24,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:24,407 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 346 transitions. [2020-10-05 22:18:24,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:24,408 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:24,408 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:24,608 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-10-05 22:18:24,609 INFO L427 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:24,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:24,609 INFO L82 PathProgramCache]: Analyzing trace with hash 668818992, now seen corresponding path program 79 times [2020-10-05 22:18:24,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:24,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449404840] [2020-10-05 22:18:24,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:24,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:24,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:24,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449404840] [2020-10-05 22:18:24,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107338263] [2020-10-05 22:18:24,687 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:24,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:24,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:24,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:24,853 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:18:24,855 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:18:24,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:24,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:24,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:24,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899037450] [2020-10-05 22:18:24,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:24,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:24,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:24,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:24,890 INFO L87 Difference]: Start difference. First operand 141 states and 346 transitions. Second operand 15 states. [2020-10-05 22:18:25,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:25,436 INFO L93 Difference]: Finished difference Result 219 states and 522 transitions. [2020-10-05 22:18:25,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-05 22:18:25,437 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:25,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:25,437 INFO L225 Difference]: With dead ends: 219 [2020-10-05 22:18:25,437 INFO L226 Difference]: Without dead ends: 214 [2020-10-05 22:18:25,438 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2020-10-05 22:18:25,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-05 22:18:25,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 140. [2020-10-05 22:18:25,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-05 22:18:25,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 341 transitions. [2020-10-05 22:18:25,440 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 341 transitions. Word has length 13 [2020-10-05 22:18:25,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:25,441 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 341 transitions. [2020-10-05 22:18:25,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:25,441 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 341 transitions. [2020-10-05 22:18:25,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:25,441 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:25,441 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:25,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:25,643 INFO L427 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:25,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:25,644 INFO L82 PathProgramCache]: Analyzing trace with hash 675254592, now seen corresponding path program 80 times [2020-10-05 22:18:25,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:25,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001697243] [2020-10-05 22:18:25,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:25,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:25,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:25,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001697243] [2020-10-05 22:18:25,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738894497] [2020-10-05 22:18:25,723 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:25,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:18:25,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:18:25,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:25,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:25,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:25,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:25,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:25,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77770108] [2020-10-05 22:18:25,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:25,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:25,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:25,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:25,895 INFO L87 Difference]: Start difference. First operand 140 states and 341 transitions. Second operand 15 states. [2020-10-05 22:18:26,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:26,156 INFO L93 Difference]: Finished difference Result 197 states and 457 transitions. [2020-10-05 22:18:26,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 22:18:26,157 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:26,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:26,158 INFO L225 Difference]: With dead ends: 197 [2020-10-05 22:18:26,158 INFO L226 Difference]: Without dead ends: 195 [2020-10-05 22:18:26,158 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-10-05 22:18:26,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-05 22:18:26,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 143. [2020-10-05 22:18:26,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-05 22:18:26,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 352 transitions. [2020-10-05 22:18:26,162 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 352 transitions. Word has length 13 [2020-10-05 22:18:26,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:26,162 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 352 transitions. [2020-10-05 22:18:26,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:26,162 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 352 transitions. [2020-10-05 22:18:26,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:26,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:26,163 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:26,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:26,368 INFO L427 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:26,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:26,368 INFO L82 PathProgramCache]: Analyzing trace with hash 675255553, now seen corresponding path program 81 times [2020-10-05 22:18:26,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:26,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482990985] [2020-10-05 22:18:26,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:26,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:26,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:26,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482990985] [2020-10-05 22:18:26,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390155443] [2020-10-05 22:18:26,447 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:26,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-05 22:18:26,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:18:26,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:26,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:26,619 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:26,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:26,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:26,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352655219] [2020-10-05 22:18:26,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:26,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:26,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:26,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:26,621 INFO L87 Difference]: Start difference. First operand 143 states and 352 transitions. Second operand 15 states. [2020-10-05 22:18:26,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:26,900 INFO L93 Difference]: Finished difference Result 202 states and 467 transitions. [2020-10-05 22:18:26,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 22:18:26,901 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:26,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:26,901 INFO L225 Difference]: With dead ends: 202 [2020-10-05 22:18:26,902 INFO L226 Difference]: Without dead ends: 200 [2020-10-05 22:18:26,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2020-10-05 22:18:26,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-05 22:18:26,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 143. [2020-10-05 22:18:26,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-05 22:18:26,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 351 transitions. [2020-10-05 22:18:26,905 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 351 transitions. Word has length 13 [2020-10-05 22:18:26,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:26,905 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 351 transitions. [2020-10-05 22:18:26,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:26,905 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 351 transitions. [2020-10-05 22:18:26,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:26,906 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:26,906 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:27,106 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2020-10-05 22:18:27,107 INFO L427 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:27,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:27,107 INFO L82 PathProgramCache]: Analyzing trace with hash 675284383, now seen corresponding path program 82 times [2020-10-05 22:18:27,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:27,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190555431] [2020-10-05 22:18:27,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:27,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:27,186 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:27,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190555431] [2020-10-05 22:18:27,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280089988] [2020-10-05 22:18:27,187 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:27,227 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:18:27,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:18:27,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:27,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:27,375 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:27,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:27,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:27,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80065237] [2020-10-05 22:18:27,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:27,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:27,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:27,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:27,377 INFO L87 Difference]: Start difference. First operand 143 states and 351 transitions. Second operand 15 states. [2020-10-05 22:18:27,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:27,664 INFO L93 Difference]: Finished difference Result 197 states and 458 transitions. [2020-10-05 22:18:27,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 22:18:27,665 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:27,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:27,665 INFO L225 Difference]: With dead ends: 197 [2020-10-05 22:18:27,666 INFO L226 Difference]: Without dead ends: 195 [2020-10-05 22:18:27,666 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2020-10-05 22:18:27,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-05 22:18:27,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 142. [2020-10-05 22:18:27,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-05 22:18:27,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 348 transitions. [2020-10-05 22:18:27,669 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 348 transitions. Word has length 13 [2020-10-05 22:18:27,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:27,669 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 348 transitions. [2020-10-05 22:18:27,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:27,669 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 348 transitions. [2020-10-05 22:18:27,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:27,670 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:27,670 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:27,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-10-05 22:18:27,871 INFO L427 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:27,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:27,871 INFO L82 PathProgramCache]: Analyzing trace with hash 695810382, now seen corresponding path program 83 times [2020-10-05 22:18:27,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:27,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96503269] [2020-10-05 22:18:27,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:27,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:27,945 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:27,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96503269] [2020-10-05 22:18:27,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637341683] [2020-10-05 22:18:27,946 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:27,985 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:18:27,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:18:27,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:27,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:28,109 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:28,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:28,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:28,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440504647] [2020-10-05 22:18:28,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:28,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:28,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:28,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:28,111 INFO L87 Difference]: Start difference. First operand 142 states and 348 transitions. Second operand 15 states. [2020-10-05 22:18:28,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:28,543 INFO L93 Difference]: Finished difference Result 214 states and 496 transitions. [2020-10-05 22:18:28,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-05 22:18:28,544 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:28,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:28,545 INFO L225 Difference]: With dead ends: 214 [2020-10-05 22:18:28,545 INFO L226 Difference]: Without dead ends: 212 [2020-10-05 22:18:28,545 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2020-10-05 22:18:28,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-05 22:18:28,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 144. [2020-10-05 22:18:28,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-05 22:18:28,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 356 transitions. [2020-10-05 22:18:28,549 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 356 transitions. Word has length 13 [2020-10-05 22:18:28,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:28,549 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 356 transitions. [2020-10-05 22:18:28,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:28,550 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 356 transitions. [2020-10-05 22:18:28,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:28,550 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:28,550 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:28,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-10-05 22:18:28,755 INFO L427 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:28,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:28,755 INFO L82 PathProgramCache]: Analyzing trace with hash 695811343, now seen corresponding path program 84 times [2020-10-05 22:18:28,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:28,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525642619] [2020-10-05 22:18:28,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:28,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:28,835 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:28,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525642619] [2020-10-05 22:18:28,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297075148] [2020-10-05 22:18:28,836 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:28,889 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-05 22:18:28,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:18:28,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:28,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:29,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:29,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:29,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:29,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10916514] [2020-10-05 22:18:29,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:29,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:29,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:29,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:29,021 INFO L87 Difference]: Start difference. First operand 144 states and 356 transitions. Second operand 15 states. [2020-10-05 22:18:29,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:29,433 INFO L93 Difference]: Finished difference Result 217 states and 502 transitions. [2020-10-05 22:18:29,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-05 22:18:29,434 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:29,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:29,434 INFO L225 Difference]: With dead ends: 217 [2020-10-05 22:18:29,434 INFO L226 Difference]: Without dead ends: 215 [2020-10-05 22:18:29,435 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2020-10-05 22:18:29,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-05 22:18:29,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 145. [2020-10-05 22:18:29,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-05 22:18:29,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-10-05 22:18:29,438 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-10-05 22:18:29,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:29,438 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-10-05 22:18:29,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:29,439 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-10-05 22:18:29,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:29,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:29,439 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:29,647 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:29,648 INFO L427 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:29,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:29,648 INFO L82 PathProgramCache]: Analyzing trace with hash 696473472, now seen corresponding path program 85 times [2020-10-05 22:18:29,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:29,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001699449] [2020-10-05 22:18:29,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:29,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:29,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:29,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001699449] [2020-10-05 22:18:29,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814895603] [2020-10-05 22:18:29,726 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:29,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:29,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:29,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:29,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:29,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:29,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:29,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609279312] [2020-10-05 22:18:29,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:29,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:29,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:29,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:29,896 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-10-05 22:18:30,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:30,318 INFO L93 Difference]: Finished difference Result 211 states and 500 transitions. [2020-10-05 22:18:30,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-05 22:18:30,319 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:30,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:30,320 INFO L225 Difference]: With dead ends: 211 [2020-10-05 22:18:30,320 INFO L226 Difference]: Without dead ends: 209 [2020-10-05 22:18:30,320 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2020-10-05 22:18:30,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-05 22:18:30,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 147. [2020-10-05 22:18:30,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-05 22:18:30,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-05 22:18:30,325 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-05 22:18:30,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:30,325 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-05 22:18:30,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:30,325 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-05 22:18:30,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:30,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:30,325 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:30,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:30,526 INFO L427 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:30,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:30,527 INFO L82 PathProgramCache]: Analyzing trace with hash 696494831, now seen corresponding path program 86 times [2020-10-05 22:18:30,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:30,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936755890] [2020-10-05 22:18:30,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:30,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:30,604 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:30,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936755890] [2020-10-05 22:18:30,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101542127] [2020-10-05 22:18:30,605 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:30,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:18:30,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:18:30,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:30,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:30,749 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:18:30,764 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:30,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:30,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:30,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115747694] [2020-10-05 22:18:30,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:30,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:30,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:30,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:30,766 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-05 22:18:31,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:31,253 INFO L93 Difference]: Finished difference Result 211 states and 507 transitions. [2020-10-05 22:18:31,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-05 22:18:31,254 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:31,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:31,255 INFO L225 Difference]: With dead ends: 211 [2020-10-05 22:18:31,255 INFO L226 Difference]: Without dead ends: 206 [2020-10-05 22:18:31,255 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-10-05 22:18:31,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-05 22:18:31,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 147. [2020-10-05 22:18:31,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-05 22:18:31,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-05 22:18:31,259 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-05 22:18:31,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:31,259 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-05 22:18:31,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:31,259 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-05 22:18:31,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:31,260 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:31,260 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:31,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-10-05 22:18:31,462 INFO L427 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:31,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:31,462 INFO L82 PathProgramCache]: Analyzing trace with hash 696495792, now seen corresponding path program 87 times [2020-10-05 22:18:31,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:31,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162875439] [2020-10-05 22:18:31,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:31,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:31,543 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:31,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162875439] [2020-10-05 22:18:31,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880912130] [2020-10-05 22:18:31,544 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:31,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-05 22:18:31,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:18:31,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:31,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:31,698 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:18:31,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:31,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:31,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:31,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617330615] [2020-10-05 22:18:31,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:31,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:31,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:31,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:31,735 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-05 22:18:32,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:32,340 INFO L93 Difference]: Finished difference Result 227 states and 546 transitions. [2020-10-05 22:18:32,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-05 22:18:32,341 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:32,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:32,341 INFO L225 Difference]: With dead ends: 227 [2020-10-05 22:18:32,341 INFO L226 Difference]: Without dead ends: 222 [2020-10-05 22:18:32,342 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-10-05 22:18:32,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-05 22:18:32,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 145. [2020-10-05 22:18:32,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-05 22:18:32,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-10-05 22:18:32,344 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-10-05 22:18:32,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:32,345 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-10-05 22:18:32,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:32,345 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-10-05 22:18:32,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:32,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:32,345 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:32,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2020-10-05 22:18:32,547 INFO L427 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:32,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:32,548 INFO L82 PathProgramCache]: Analyzing trace with hash 696503263, now seen corresponding path program 88 times [2020-10-05 22:18:32,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:32,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506756097] [2020-10-05 22:18:32,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:32,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:32,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:32,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506756097] [2020-10-05 22:18:32,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726579959] [2020-10-05 22:18:32,622 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:32,663 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:18:32,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:18:32,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:32,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:32,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:32,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:32,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:32,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522904521] [2020-10-05 22:18:32,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:32,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:32,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:32,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:32,792 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-10-05 22:18:33,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:33,284 INFO L93 Difference]: Finished difference Result 221 states and 523 transitions. [2020-10-05 22:18:33,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-05 22:18:33,284 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:33,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:33,285 INFO L225 Difference]: With dead ends: 221 [2020-10-05 22:18:33,285 INFO L226 Difference]: Without dead ends: 219 [2020-10-05 22:18:33,285 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=278, Invalid=652, Unknown=0, NotChecked=0, Total=930 [2020-10-05 22:18:33,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-05 22:18:33,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 147. [2020-10-05 22:18:33,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-05 22:18:33,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-05 22:18:33,289 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-05 22:18:33,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:33,289 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-05 22:18:33,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:33,289 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-05 22:18:33,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:33,290 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:33,290 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:33,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:33,490 INFO L427 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:33,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:33,491 INFO L82 PathProgramCache]: Analyzing trace with hash 696524622, now seen corresponding path program 89 times [2020-10-05 22:18:33,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:33,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642524099] [2020-10-05 22:18:33,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:33,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:33,573 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:33,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642524099] [2020-10-05 22:18:33,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343514047] [2020-10-05 22:18:33,574 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:33,623 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-05 22:18:33,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:18:33,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:33,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:33,727 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:18:33,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:33,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:33,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:33,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146170492] [2020-10-05 22:18:33,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:33,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:33,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:33,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:33,740 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-05 22:18:34,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:34,343 INFO L93 Difference]: Finished difference Result 240 states and 577 transitions. [2020-10-05 22:18:34,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-05 22:18:34,344 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:34,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:34,345 INFO L225 Difference]: With dead ends: 240 [2020-10-05 22:18:34,345 INFO L226 Difference]: Without dead ends: 232 [2020-10-05 22:18:34,345 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-10-05 22:18:34,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-05 22:18:34,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 148. [2020-10-05 22:18:34,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-05 22:18:34,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 372 transitions. [2020-10-05 22:18:34,349 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 372 transitions. Word has length 13 [2020-10-05 22:18:34,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:34,349 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 372 transitions. [2020-10-05 22:18:34,349 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:34,349 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 372 transitions. [2020-10-05 22:18:34,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:34,349 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:34,349 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:34,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-10-05 22:18:34,550 INFO L427 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:34,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:34,551 INFO L82 PathProgramCache]: Analyzing trace with hash 696525583, now seen corresponding path program 90 times [2020-10-05 22:18:34,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:34,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917499521] [2020-10-05 22:18:34,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:34,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:34,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:34,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917499521] [2020-10-05 22:18:34,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53386429] [2020-10-05 22:18:34,632 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:34,673 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-05 22:18:34,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:18:34,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:34,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:34,812 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:18:34,831 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:34,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:34,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:34,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018438245] [2020-10-05 22:18:34,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:34,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:34,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:34,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:34,834 INFO L87 Difference]: Start difference. First operand 148 states and 372 transitions. Second operand 15 states. [2020-10-05 22:18:35,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:35,701 INFO L93 Difference]: Finished difference Result 238 states and 576 transitions. [2020-10-05 22:18:35,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-05 22:18:35,702 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:35,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:35,704 INFO L225 Difference]: With dead ends: 238 [2020-10-05 22:18:35,704 INFO L226 Difference]: Without dead ends: 230 [2020-10-05 22:18:35,705 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-10-05 22:18:35,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-10-05 22:18:35,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 142. [2020-10-05 22:18:35,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-05 22:18:35,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-10-05 22:18:35,710 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-10-05 22:18:35,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:35,711 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-10-05 22:18:35,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:35,711 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-10-05 22:18:35,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:35,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:35,712 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:35,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:35,925 INFO L427 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:35,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:35,926 INFO L82 PathProgramCache]: Analyzing trace with hash 696733903, now seen corresponding path program 91 times [2020-10-05 22:18:35,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:35,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591844386] [2020-10-05 22:18:35,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:35,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:36,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:36,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591844386] [2020-10-05 22:18:36,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633508108] [2020-10-05 22:18:36,040 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:36,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:36,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:36,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:36,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:36,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:36,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:36,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901052175] [2020-10-05 22:18:36,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:36,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:36,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:36,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:36,314 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-10-05 22:18:36,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:36,666 INFO L93 Difference]: Finished difference Result 195 states and 459 transitions. [2020-10-05 22:18:36,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-05 22:18:36,667 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:36,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:36,668 INFO L225 Difference]: With dead ends: 195 [2020-10-05 22:18:36,668 INFO L226 Difference]: Without dead ends: 193 [2020-10-05 22:18:36,669 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2020-10-05 22:18:36,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-05 22:18:36,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 142. [2020-10-05 22:18:36,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-05 22:18:36,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-10-05 22:18:36,673 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-10-05 22:18:36,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:36,673 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-10-05 22:18:36,673 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:36,673 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-10-05 22:18:36,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:36,674 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:36,674 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:36,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2020-10-05 22:18:36,883 INFO L427 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:36,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:36,884 INFO L82 PathProgramCache]: Analyzing trace with hash 697396993, now seen corresponding path program 92 times [2020-10-05 22:18:36,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:36,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285419883] [2020-10-05 22:18:36,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:36,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:36,968 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:36,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285419883] [2020-10-05 22:18:36,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987363720] [2020-10-05 22:18:36,968 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:37,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:18:37,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:18:37,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:37,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:37,151 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:37,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:37,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:37,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223453726] [2020-10-05 22:18:37,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:37,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:37,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:37,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:37,152 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-10-05 22:18:37,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:37,647 INFO L93 Difference]: Finished difference Result 206 states and 489 transitions. [2020-10-05 22:18:37,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-05 22:18:37,647 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:37,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:37,648 INFO L225 Difference]: With dead ends: 206 [2020-10-05 22:18:37,648 INFO L226 Difference]: Without dead ends: 204 [2020-10-05 22:18:37,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2020-10-05 22:18:37,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-05 22:18:37,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 143. [2020-10-05 22:18:37,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-05 22:18:37,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 356 transitions. [2020-10-05 22:18:37,651 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 356 transitions. Word has length 13 [2020-10-05 22:18:37,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:37,651 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 356 transitions. [2020-10-05 22:18:37,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:37,651 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 356 transitions. [2020-10-05 22:18:37,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:37,652 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:37,652 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:37,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:37,853 INFO L427 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:37,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:37,853 INFO L82 PathProgramCache]: Analyzing trace with hash 697419313, now seen corresponding path program 93 times [2020-10-05 22:18:37,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:37,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024936552] [2020-10-05 22:18:37,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:37,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:37,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:37,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024936552] [2020-10-05 22:18:37,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551296601] [2020-10-05 22:18:37,935 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:37,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-05 22:18:37,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:18:37,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:18:37,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:38,089 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:18:38,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:38,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:38,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:38,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547181025] [2020-10-05 22:18:38,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:38,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:38,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:38,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:38,114 INFO L87 Difference]: Start difference. First operand 143 states and 356 transitions. Second operand 15 states. [2020-10-05 22:18:38,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:38,737 INFO L93 Difference]: Finished difference Result 224 states and 535 transitions. [2020-10-05 22:18:38,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-05 22:18:38,738 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:38,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:38,738 INFO L225 Difference]: With dead ends: 224 [2020-10-05 22:18:38,738 INFO L226 Difference]: Without dead ends: 219 [2020-10-05 22:18:38,739 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=270, Invalid=660, Unknown=0, NotChecked=0, Total=930 [2020-10-05 22:18:38,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-05 22:18:38,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 139. [2020-10-05 22:18:38,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-05 22:18:38,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 339 transitions. [2020-10-05 22:18:38,745 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 339 transitions. Word has length 13 [2020-10-05 22:18:38,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:38,745 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 339 transitions. [2020-10-05 22:18:38,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:38,745 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 339 transitions. [2020-10-05 22:18:38,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:38,746 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:38,746 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:38,953 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2020-10-05 22:18:38,954 INFO L427 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:38,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:38,954 INFO L82 PathProgramCache]: Analyzing trace with hash 896899632, now seen corresponding path program 94 times [2020-10-05 22:18:38,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:38,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4215965] [2020-10-05 22:18:38,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:38,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:39,040 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:39,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4215965] [2020-10-05 22:18:39,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885655930] [2020-10-05 22:18:39,041 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:39,080 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:18:39,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:18:39,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:39,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:39,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:39,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:39,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:39,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741420976] [2020-10-05 22:18:39,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:39,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:39,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:39,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:39,209 INFO L87 Difference]: Start difference. First operand 139 states and 339 transitions. Second operand 15 states. [2020-10-05 22:18:39,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:39,432 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-10-05 22:18:39,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-05 22:18:39,432 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:39,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:39,433 INFO L225 Difference]: With dead ends: 194 [2020-10-05 22:18:39,433 INFO L226 Difference]: Without dead ends: 192 [2020-10-05 22:18:39,433 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-05 22:18:39,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-05 22:18:39,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 141. [2020-10-05 22:18:39,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-05 22:18:39,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 345 transitions. [2020-10-05 22:18:39,436 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 345 transitions. Word has length 13 [2020-10-05 22:18:39,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:39,436 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 345 transitions. [2020-10-05 22:18:39,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:39,436 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 345 transitions. [2020-10-05 22:18:39,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:39,436 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:39,437 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:39,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:39,638 INFO L427 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:39,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:39,638 INFO L82 PathProgramCache]: Analyzing trace with hash 896900593, now seen corresponding path program 95 times [2020-10-05 22:18:39,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:39,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448246998] [2020-10-05 22:18:39,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:39,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:39,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:39,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448246998] [2020-10-05 22:18:39,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127987929] [2020-10-05 22:18:39,728 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:39,796 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-05 22:18:39,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:18:39,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:39,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:39,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:39,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:39,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:39,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711813775] [2020-10-05 22:18:39,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:39,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:39,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:39,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:39,949 INFO L87 Difference]: Start difference. First operand 141 states and 345 transitions. Second operand 15 states. [2020-10-05 22:18:40,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:40,253 INFO L93 Difference]: Finished difference Result 205 states and 471 transitions. [2020-10-05 22:18:40,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 22:18:40,254 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:40,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:40,254 INFO L225 Difference]: With dead ends: 205 [2020-10-05 22:18:40,255 INFO L226 Difference]: Without dead ends: 203 [2020-10-05 22:18:40,255 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-10-05 22:18:40,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-05 22:18:40,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 142. [2020-10-05 22:18:40,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-05 22:18:40,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 347 transitions. [2020-10-05 22:18:40,259 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 347 transitions. Word has length 13 [2020-10-05 22:18:40,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:40,259 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 347 transitions. [2020-10-05 22:18:40,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:40,259 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 347 transitions. [2020-10-05 22:18:40,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:40,259 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:40,260 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:40,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:40,469 INFO L427 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:40,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:40,469 INFO L82 PathProgramCache]: Analyzing trace with hash 896929423, now seen corresponding path program 96 times [2020-10-05 22:18:40,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:40,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837019457] [2020-10-05 22:18:40,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:40,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:40,556 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:40,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837019457] [2020-10-05 22:18:40,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055003946] [2020-10-05 22:18:40,557 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:40,594 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-05 22:18:40,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:18:40,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:40,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:40,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:40,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:40,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:40,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881049099] [2020-10-05 22:18:40,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:40,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:40,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:40,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:40,733 INFO L87 Difference]: Start difference. First operand 142 states and 347 transitions. Second operand 15 states. [2020-10-05 22:18:41,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:41,002 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-10-05 22:18:41,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 22:18:41,003 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:41,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:41,003 INFO L225 Difference]: With dead ends: 201 [2020-10-05 22:18:41,003 INFO L226 Difference]: Without dead ends: 199 [2020-10-05 22:18:41,004 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-10-05 22:18:41,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-05 22:18:41,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 137. [2020-10-05 22:18:41,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-05 22:18:41,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 334 transitions. [2020-10-05 22:18:41,007 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 334 transitions. Word has length 13 [2020-10-05 22:18:41,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:41,007 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 334 transitions. [2020-10-05 22:18:41,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:41,007 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 334 transitions. [2020-10-05 22:18:41,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:41,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:41,007 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:41,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:41,208 INFO L427 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:41,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:41,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1534129122, now seen corresponding path program 97 times [2020-10-05 22:18:41,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:41,209 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407751574] [2020-10-05 22:18:41,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:41,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:41,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:41,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407751574] [2020-10-05 22:18:41,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105507195] [2020-10-05 22:18:41,288 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:41,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:41,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:41,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:41,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:41,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:41,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:41,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547530172] [2020-10-05 22:18:41,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:41,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:41,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:41,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:41,518 INFO L87 Difference]: Start difference. First operand 137 states and 334 transitions. Second operand 15 states. [2020-10-05 22:18:41,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:41,814 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-10-05 22:18:41,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-05 22:18:41,815 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:41,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:41,815 INFO L225 Difference]: With dead ends: 194 [2020-10-05 22:18:41,815 INFO L226 Difference]: Without dead ends: 192 [2020-10-05 22:18:41,816 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-10-05 22:18:41,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-05 22:18:41,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 140. [2020-10-05 22:18:41,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-05 22:18:41,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 345 transitions. [2020-10-05 22:18:41,819 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 345 transitions. Word has length 13 [2020-10-05 22:18:41,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:41,819 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 345 transitions. [2020-10-05 22:18:41,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:41,819 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 345 transitions. [2020-10-05 22:18:41,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:41,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:41,820 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:42,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-10-05 22:18:42,026 INFO L427 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:42,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:42,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1534130083, now seen corresponding path program 98 times [2020-10-05 22:18:42,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:42,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651677862] [2020-10-05 22:18:42,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:42,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:42,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:42,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651677862] [2020-10-05 22:18:42,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094256813] [2020-10-05 22:18:42,104 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:42,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:18:42,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:18:42,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:42,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:42,293 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:42,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:42,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:42,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130629623] [2020-10-05 22:18:42,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:42,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:42,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:42,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:42,295 INFO L87 Difference]: Start difference. First operand 140 states and 345 transitions. Second operand 15 states. [2020-10-05 22:18:42,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:42,647 INFO L93 Difference]: Finished difference Result 209 states and 478 transitions. [2020-10-05 22:18:42,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-05 22:18:42,648 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:42,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:42,648 INFO L225 Difference]: With dead ends: 209 [2020-10-05 22:18:42,648 INFO L226 Difference]: Without dead ends: 207 [2020-10-05 22:18:42,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-10-05 22:18:42,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-05 22:18:42,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 140. [2020-10-05 22:18:42,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-05 22:18:42,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 344 transitions. [2020-10-05 22:18:42,652 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 344 transitions. Word has length 13 [2020-10-05 22:18:42,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:42,652 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 344 transitions. [2020-10-05 22:18:42,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:42,652 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 344 transitions. [2020-10-05 22:18:42,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:42,652 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:42,652 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:42,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:42,853 INFO L427 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:42,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:42,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1534158913, now seen corresponding path program 99 times [2020-10-05 22:18:42,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:42,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993697027] [2020-10-05 22:18:42,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:42,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:42,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:42,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993697027] [2020-10-05 22:18:42,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102959869] [2020-10-05 22:18:42,934 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:42,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-05 22:18:42,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:18:42,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:42,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:43,109 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:43,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:43,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:43,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328324591] [2020-10-05 22:18:43,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:43,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:43,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:43,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:43,111 INFO L87 Difference]: Start difference. First operand 140 states and 344 transitions. Second operand 15 states. [2020-10-05 22:18:43,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:43,439 INFO L93 Difference]: Finished difference Result 202 states and 464 transitions. [2020-10-05 22:18:43,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-05 22:18:43,440 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:43,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:43,441 INFO L225 Difference]: With dead ends: 202 [2020-10-05 22:18:43,441 INFO L226 Difference]: Without dead ends: 200 [2020-10-05 22:18:43,441 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2020-10-05 22:18:43,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-05 22:18:43,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 139. [2020-10-05 22:18:43,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-05 22:18:43,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-10-05 22:18:43,445 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-10-05 22:18:43,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:43,445 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-10-05 22:18:43,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:43,446 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-10-05 22:18:43,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:43,446 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:43,446 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:43,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-10-05 22:18:43,657 INFO L427 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:43,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:43,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1554684912, now seen corresponding path program 100 times [2020-10-05 22:18:43,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:43,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699339691] [2020-10-05 22:18:43,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:43,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:43,732 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:43,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699339691] [2020-10-05 22:18:43,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329807217] [2020-10-05 22:18:43,733 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:43,772 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:18:43,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:18:43,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:43,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:43,910 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:43,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:43,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:43,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265186207] [2020-10-05 22:18:43,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:43,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:43,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:43,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:43,912 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 15 states. [2020-10-05 22:18:44,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:44,223 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-10-05 22:18:44,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-05 22:18:44,224 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:44,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:44,225 INFO L225 Difference]: With dead ends: 201 [2020-10-05 22:18:44,225 INFO L226 Difference]: Without dead ends: 199 [2020-10-05 22:18:44,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2020-10-05 22:18:44,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-05 22:18:44,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 141. [2020-10-05 22:18:44,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-05 22:18:44,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 349 transitions. [2020-10-05 22:18:44,229 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 349 transitions. Word has length 13 [2020-10-05 22:18:44,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:44,229 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 349 transitions. [2020-10-05 22:18:44,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:44,230 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 349 transitions. [2020-10-05 22:18:44,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:44,230 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:44,230 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:44,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-10-05 22:18:44,433 INFO L427 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:44,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:44,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1554685873, now seen corresponding path program 101 times [2020-10-05 22:18:44,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:44,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546582033] [2020-10-05 22:18:44,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:44,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:44,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:44,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546582033] [2020-10-05 22:18:44,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386480292] [2020-10-05 22:18:44,511 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:44,549 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-05 22:18:44,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:18:44,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:44,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:44,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:44,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:44,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:44,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106796848] [2020-10-05 22:18:44,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:44,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:44,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:44,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:44,695 INFO L87 Difference]: Start difference. First operand 141 states and 349 transitions. Second operand 15 states. [2020-10-05 22:18:45,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:45,158 INFO L93 Difference]: Finished difference Result 215 states and 495 transitions. [2020-10-05 22:18:45,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-05 22:18:45,159 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:45,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:45,159 INFO L225 Difference]: With dead ends: 215 [2020-10-05 22:18:45,160 INFO L226 Difference]: Without dead ends: 213 [2020-10-05 22:18:45,160 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-10-05 22:18:45,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-05 22:18:45,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 142. [2020-10-05 22:18:45,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-05 22:18:45,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-10-05 22:18:45,164 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-10-05 22:18:45,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:45,164 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-10-05 22:18:45,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:45,164 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-10-05 22:18:45,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:45,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:45,165 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:45,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:45,376 INFO L427 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:45,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:45,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1555348002, now seen corresponding path program 102 times [2020-10-05 22:18:45,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:45,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049986169] [2020-10-05 22:18:45,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:45,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:45,462 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:45,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049986169] [2020-10-05 22:18:45,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733550923] [2020-10-05 22:18:45,463 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:45,502 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-05 22:18:45,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:18:45,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:45,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:45,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:45,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:45,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:45,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883679321] [2020-10-05 22:18:45,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:45,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:45,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:45,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:45,637 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-10-05 22:18:46,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:46,022 INFO L93 Difference]: Finished difference Result 196 states and 461 transitions. [2020-10-05 22:18:46,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-05 22:18:46,022 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:46,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:46,024 INFO L225 Difference]: With dead ends: 196 [2020-10-05 22:18:46,024 INFO L226 Difference]: Without dead ends: 194 [2020-10-05 22:18:46,024 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2020-10-05 22:18:46,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-05 22:18:46,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 144. [2020-10-05 22:18:46,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-05 22:18:46,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-05 22:18:46,027 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-05 22:18:46,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:46,028 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-05 22:18:46,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:46,028 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-05 22:18:46,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:46,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:46,029 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:46,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:46,231 INFO L427 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:46,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:46,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1555369361, now seen corresponding path program 103 times [2020-10-05 22:18:46,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:46,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432978546] [2020-10-05 22:18:46,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:46,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:46,308 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:46,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432978546] [2020-10-05 22:18:46,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376813640] [2020-10-05 22:18:46,309 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:46,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:46,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:46,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:46,465 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:18:46,474 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:46,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:46,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:46,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189093577] [2020-10-05 22:18:46,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:46,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:46,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:46,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:46,476 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-05 22:18:46,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:46,774 INFO L93 Difference]: Finished difference Result 191 states and 460 transitions. [2020-10-05 22:18:46,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-05 22:18:46,775 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:46,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:46,776 INFO L225 Difference]: With dead ends: 191 [2020-10-05 22:18:46,776 INFO L226 Difference]: Without dead ends: 186 [2020-10-05 22:18:46,777 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2020-10-05 22:18:46,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-05 22:18:46,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 144. [2020-10-05 22:18:46,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-05 22:18:46,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-05 22:18:46,779 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-05 22:18:46,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:46,779 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-05 22:18:46,780 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:46,780 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-05 22:18:46,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:46,780 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:46,780 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:46,985 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-10-05 22:18:46,986 INFO L427 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:46,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:46,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1555370322, now seen corresponding path program 104 times [2020-10-05 22:18:46,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:46,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173067710] [2020-10-05 22:18:46,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:46,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:47,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:47,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173067710] [2020-10-05 22:18:47,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376386778] [2020-10-05 22:18:47,073 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:47,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:18:47,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:18:47,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:47,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:47,249 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:18:47,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:47,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:47,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:47,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591977331] [2020-10-05 22:18:47,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:47,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:47,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:47,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:47,289 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-05 22:18:47,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:47,836 INFO L93 Difference]: Finished difference Result 232 states and 551 transitions. [2020-10-05 22:18:47,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-05 22:18:47,836 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:47,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:47,837 INFO L225 Difference]: With dead ends: 232 [2020-10-05 22:18:47,838 INFO L226 Difference]: Without dead ends: 227 [2020-10-05 22:18:47,838 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=280, Invalid=650, Unknown=0, NotChecked=0, Total=930 [2020-10-05 22:18:47,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-05 22:18:47,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 142. [2020-10-05 22:18:47,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-05 22:18:47,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-10-05 22:18:47,841 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-10-05 22:18:47,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:47,841 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-10-05 22:18:47,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:47,841 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-10-05 22:18:47,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:47,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:47,841 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:48,042 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:48,042 INFO L427 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:48,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:48,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1555377793, now seen corresponding path program 105 times [2020-10-05 22:18:48,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:48,043 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657024969] [2020-10-05 22:18:48,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:48,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:48,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:48,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657024969] [2020-10-05 22:18:48,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275776112] [2020-10-05 22:18:48,121 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:48,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-05 22:18:48,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:18:48,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-05 22:18:48,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:48,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:48,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:48,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:48,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929071473] [2020-10-05 22:18:48,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:48,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:48,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:48,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:48,284 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-10-05 22:18:48,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:48,975 INFO L93 Difference]: Finished difference Result 243 states and 560 transitions. [2020-10-05 22:18:48,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-05 22:18:48,975 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:48,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:48,976 INFO L225 Difference]: With dead ends: 243 [2020-10-05 22:18:48,977 INFO L226 Difference]: Without dead ends: 239 [2020-10-05 22:18:48,977 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=281, Invalid=841, Unknown=0, NotChecked=0, Total=1122 [2020-10-05 22:18:48,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-05 22:18:48,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 144. [2020-10-05 22:18:48,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-05 22:18:48,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-05 22:18:48,980 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-05 22:18:48,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:48,980 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-05 22:18:48,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:48,981 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-05 22:18:48,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:48,981 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:48,981 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:49,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:49,182 INFO L427 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:49,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:49,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1555399152, now seen corresponding path program 106 times [2020-10-05 22:18:49,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:49,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597489673] [2020-10-05 22:18:49,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:49,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:49,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:49,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597489673] [2020-10-05 22:18:49,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862407079] [2020-10-05 22:18:49,265 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:49,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:18:49,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:18:49,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:49,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:49,426 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:18:49,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:49,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:49,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:49,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592131938] [2020-10-05 22:18:49,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:49,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:49,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:49,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:49,460 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-05 22:18:50,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:50,216 INFO L93 Difference]: Finished difference Result 254 states and 608 transitions. [2020-10-05 22:18:50,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-05 22:18:50,216 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:50,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:50,217 INFO L225 Difference]: With dead ends: 254 [2020-10-05 22:18:50,217 INFO L226 Difference]: Without dead ends: 246 [2020-10-05 22:18:50,218 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=345, Invalid=777, Unknown=0, NotChecked=0, Total=1122 [2020-10-05 22:18:50,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-05 22:18:50,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 146. [2020-10-05 22:18:50,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-05 22:18:50,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 370 transitions. [2020-10-05 22:18:50,231 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 370 transitions. Word has length 13 [2020-10-05 22:18:50,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:50,231 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 370 transitions. [2020-10-05 22:18:50,231 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:50,231 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 370 transitions. [2020-10-05 22:18:50,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:50,232 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:50,232 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:50,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:50,444 INFO L427 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:50,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:50,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1555400113, now seen corresponding path program 107 times [2020-10-05 22:18:50,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:50,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653577020] [2020-10-05 22:18:50,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:50,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:50,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:50,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653577020] [2020-10-05 22:18:50,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252080597] [2020-10-05 22:18:50,526 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:50,567 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-05 22:18:50,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:18:50,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:50,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:50,687 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:18:50,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:50,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:50,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:50,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177691724] [2020-10-05 22:18:50,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:50,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:50,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:50,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:50,714 INFO L87 Difference]: Start difference. First operand 146 states and 370 transitions. Second operand 15 states. [2020-10-05 22:18:51,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:51,480 INFO L93 Difference]: Finished difference Result 246 states and 581 transitions. [2020-10-05 22:18:51,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-05 22:18:51,480 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:51,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:51,481 INFO L225 Difference]: With dead ends: 246 [2020-10-05 22:18:51,482 INFO L226 Difference]: Without dead ends: 238 [2020-10-05 22:18:51,482 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=384, Invalid=876, Unknown=0, NotChecked=0, Total=1260 [2020-10-05 22:18:51,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-10-05 22:18:51,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 139. [2020-10-05 22:18:51,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-05 22:18:51,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 344 transitions. [2020-10-05 22:18:51,487 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 344 transitions. Word has length 13 [2020-10-05 22:18:51,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:51,487 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 344 transitions. [2020-10-05 22:18:51,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:51,487 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 344 transitions. [2020-10-05 22:18:51,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:51,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:51,488 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:51,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2020-10-05 22:18:51,689 INFO L427 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:51,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:51,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1555608433, now seen corresponding path program 108 times [2020-10-05 22:18:51,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:51,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032497160] [2020-10-05 22:18:51,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:51,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:51,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:51,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032497160] [2020-10-05 22:18:51,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175191661] [2020-10-05 22:18:51,770 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:51,810 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-05 22:18:51,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:18:51,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:51,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:51,953 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:51,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:51,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:51,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438395836] [2020-10-05 22:18:51,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:51,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:51,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:51,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:51,955 INFO L87 Difference]: Start difference. First operand 139 states and 344 transitions. Second operand 15 states. [2020-10-05 22:18:52,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:52,355 INFO L93 Difference]: Finished difference Result 208 states and 483 transitions. [2020-10-05 22:18:52,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-05 22:18:52,355 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:52,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:52,356 INFO L225 Difference]: With dead ends: 208 [2020-10-05 22:18:52,356 INFO L226 Difference]: Without dead ends: 206 [2020-10-05 22:18:52,356 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=205, Invalid=497, Unknown=0, NotChecked=0, Total=702 [2020-10-05 22:18:52,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-05 22:18:52,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 136. [2020-10-05 22:18:52,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-05 22:18:52,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 337 transitions. [2020-10-05 22:18:52,360 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 337 transitions. Word has length 13 [2020-10-05 22:18:52,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:52,360 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 337 transitions. [2020-10-05 22:18:52,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:52,360 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 337 transitions. [2020-10-05 22:18:52,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:52,360 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:52,361 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:52,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-10-05 22:18:52,561 INFO L427 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:52,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:52,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1556271523, now seen corresponding path program 109 times [2020-10-05 22:18:52,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:52,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230458993] [2020-10-05 22:18:52,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:52,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:52,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:52,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230458993] [2020-10-05 22:18:52,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24487443] [2020-10-05 22:18:52,640 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:52,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:52,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:52,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:52,812 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:52,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:52,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:52,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227339785] [2020-10-05 22:18:52,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:52,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:52,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:52,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:52,814 INFO L87 Difference]: Start difference. First operand 136 states and 337 transitions. Second operand 15 states. [2020-10-05 22:18:53,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:53,333 INFO L93 Difference]: Finished difference Result 215 states and 507 transitions. [2020-10-05 22:18:53,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-05 22:18:53,334 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:53,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:53,335 INFO L225 Difference]: With dead ends: 215 [2020-10-05 22:18:53,335 INFO L226 Difference]: Without dead ends: 213 [2020-10-05 22:18:53,335 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=265, Invalid=605, Unknown=0, NotChecked=0, Total=870 [2020-10-05 22:18:53,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-05 22:18:53,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 137. [2020-10-05 22:18:53,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-05 22:18:53,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-10-05 22:18:53,338 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-10-05 22:18:53,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:53,338 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-10-05 22:18:53,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:53,338 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-10-05 22:18:53,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:53,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:53,339 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:53,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2020-10-05 22:18:53,540 INFO L427 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:53,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:53,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1556292882, now seen corresponding path program 110 times [2020-10-05 22:18:53,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:53,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122352333] [2020-10-05 22:18:53,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:53,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:53,620 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:53,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122352333] [2020-10-05 22:18:53,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651111674] [2020-10-05 22:18:53,621 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:53,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:18:53,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:18:53,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:53,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:53,761 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:18:53,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:53,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:53,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:53,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278804478] [2020-10-05 22:18:53,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:53,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:53,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:53,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:53,774 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-10-05 22:18:54,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:54,356 INFO L93 Difference]: Finished difference Result 236 states and 563 transitions. [2020-10-05 22:18:54,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-05 22:18:54,357 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:54,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:54,358 INFO L225 Difference]: With dead ends: 236 [2020-10-05 22:18:54,358 INFO L226 Difference]: Without dead ends: 228 [2020-10-05 22:18:54,358 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-10-05 22:18:54,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-05 22:18:54,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 137. [2020-10-05 22:18:54,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-05 22:18:54,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-10-05 22:18:54,362 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-10-05 22:18:54,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:54,362 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-10-05 22:18:54,362 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:54,362 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-10-05 22:18:54,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:54,362 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:54,362 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:54,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-10-05 22:18:54,563 INFO L427 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:54,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:54,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1556293843, now seen corresponding path program 111 times [2020-10-05 22:18:54,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:54,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790490356] [2020-10-05 22:18:54,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:54,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:54,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:54,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790490356] [2020-10-05 22:18:54,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473156594] [2020-10-05 22:18:54,644 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:54,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-05 22:18:54,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:18:54,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:54,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:54,792 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:18:54,801 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:54,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:54,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:54,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613602389] [2020-10-05 22:18:54,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:54,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:54,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:54,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:54,803 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-10-05 22:18:55,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:55,451 INFO L93 Difference]: Finished difference Result 241 states and 576 transitions. [2020-10-05 22:18:55,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-05 22:18:55,451 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:55,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:55,452 INFO L225 Difference]: With dead ends: 241 [2020-10-05 22:18:55,452 INFO L226 Difference]: Without dead ends: 233 [2020-10-05 22:18:55,452 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-10-05 22:18:55,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-05 22:18:55,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 133. [2020-10-05 22:18:55,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-05 22:18:55,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 324 transitions. [2020-10-05 22:18:55,456 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 324 transitions. Word has length 13 [2020-10-05 22:18:55,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:55,456 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 324 transitions. [2020-10-05 22:18:55,456 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:55,456 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 324 transitions. [2020-10-05 22:18:55,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:55,456 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:55,456 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:55,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-10-05 22:18:55,657 INFO L427 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:55,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:55,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1556322673, now seen corresponding path program 112 times [2020-10-05 22:18:55,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:55,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439244175] [2020-10-05 22:18:55,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:55,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:55,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:55,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439244175] [2020-10-05 22:18:55,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639464435] [2020-10-05 22:18:55,738 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:55,778 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:18:55,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:18:55,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:18:55,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:55,891 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:18:55,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:55,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:55,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 22:18:55,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635888598] [2020-10-05 22:18:55,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:18:55,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:55,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:18:55,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:18:55,908 INFO L87 Difference]: Start difference. First operand 133 states and 324 transitions. Second operand 15 states. [2020-10-05 22:18:56,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:56,524 INFO L93 Difference]: Finished difference Result 232 states and 545 transitions. [2020-10-05 22:18:56,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-05 22:18:56,524 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-05 22:18:56,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:56,525 INFO L225 Difference]: With dead ends: 232 [2020-10-05 22:18:56,525 INFO L226 Difference]: Without dead ends: 224 [2020-10-05 22:18:56,525 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-10-05 22:18:56,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-05 22:18:56,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 130. [2020-10-05 22:18:56,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-05 22:18:56,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 305 transitions. [2020-10-05 22:18:56,529 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 305 transitions. Word has length 13 [2020-10-05 22:18:56,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:56,530 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 305 transitions. [2020-10-05 22:18:56,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:18:56,530 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 305 transitions. [2020-10-05 22:18:56,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:56,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:56,530 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:56,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:56,731 INFO L427 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:56,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:56,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1725446472, now seen corresponding path program 6 times [2020-10-05 22:18:56,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:56,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744623725] [2020-10-05 22:18:56,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:56,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:56,841 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:56,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744623725] [2020-10-05 22:18:56,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876522377] [2020-10-05 22:18:56,841 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:56,880 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-05 22:18:56,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:18:56,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-05 22:18:56,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:56,985 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:56,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-05 22:18:56,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 16 [2020-10-05 22:18:56,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757171475] [2020-10-05 22:18:56,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-05 22:18:56,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:56,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-05 22:18:56,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-05 22:18:56,987 INFO L87 Difference]: Start difference. First operand 130 states and 305 transitions. Second operand 8 states. [2020-10-05 22:18:57,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:57,014 INFO L93 Difference]: Finished difference Result 195 states and 513 transitions. [2020-10-05 22:18:57,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-05 22:18:57,015 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-10-05 22:18:57,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:57,016 INFO L225 Difference]: With dead ends: 195 [2020-10-05 22:18:57,016 INFO L226 Difference]: Without dead ends: 188 [2020-10-05 22:18:57,016 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-05 22:18:57,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-10-05 22:18:57,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2020-10-05 22:18:57,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-10-05 22:18:57,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 500 transitions. [2020-10-05 22:18:57,019 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 500 transitions. Word has length 13 [2020-10-05 22:18:57,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:57,020 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 500 transitions. [2020-10-05 22:18:57,020 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-05 22:18:57,020 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 500 transitions. [2020-10-05 22:18:57,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:57,020 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:57,020 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:57,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2020-10-05 22:18:57,229 INFO L427 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:57,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:57,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1934382410, now seen corresponding path program 21 times [2020-10-05 22:18:57,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:57,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511148314] [2020-10-05 22:18:57,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:57,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:57,449 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:57,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511148314] [2020-10-05 22:18:57,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820916838] [2020-10-05 22:18:57,450 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:57,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-05 22:18:57,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:18:57,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:18:57,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:57,706 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:57,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:57,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:18:57,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103254670] [2020-10-05 22:18:57,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:18:57,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:57,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:18:57,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:18:57,707 INFO L87 Difference]: Start difference. First operand 188 states and 500 transitions. Second operand 17 states. [2020-10-05 22:18:57,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:57,768 INFO L93 Difference]: Finished difference Result 249 states and 638 transitions. [2020-10-05 22:18:57,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-05 22:18:57,769 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-05 22:18:57,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:57,769 INFO L225 Difference]: With dead ends: 249 [2020-10-05 22:18:57,769 INFO L226 Difference]: Without dead ends: 241 [2020-10-05 22:18:57,770 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:18:57,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-05 22:18:57,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 197. [2020-10-05 22:18:57,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-10-05 22:18:57,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 521 transitions. [2020-10-05 22:18:57,773 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 521 transitions. Word has length 13 [2020-10-05 22:18:57,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:57,773 INFO L479 AbstractCegarLoop]: Abstraction has 197 states and 521 transitions. [2020-10-05 22:18:57,773 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:18:57,773 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 521 transitions. [2020-10-05 22:18:57,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:18:57,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:57,774 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:57,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-10-05 22:18:57,975 INFO L427 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:57,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:57,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1413108102, now seen corresponding path program 22 times [2020-10-05 22:18:57,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:57,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523889201] [2020-10-05 22:18:57,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:57,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:58,125 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:58,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523889201] [2020-10-05 22:18:58,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368411016] [2020-10-05 22:18:58,126 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:58,164 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:18:58,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:18:58,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-05 22:18:58,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:58,247 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:58,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-05 22:18:58,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 16 [2020-10-05 22:18:58,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457334110] [2020-10-05 22:18:58,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-05 22:18:58,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:58,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-05 22:18:58,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-10-05 22:18:58,248 INFO L87 Difference]: Start difference. First operand 197 states and 521 transitions. Second operand 8 states. [2020-10-05 22:18:58,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:58,274 INFO L93 Difference]: Finished difference Result 278 states and 705 transitions. [2020-10-05 22:18:58,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-05 22:18:58,275 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-10-05 22:18:58,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:58,276 INFO L225 Difference]: With dead ends: 278 [2020-10-05 22:18:58,276 INFO L226 Difference]: Without dead ends: 248 [2020-10-05 22:18:58,276 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-10-05 22:18:58,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-10-05 22:18:58,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 240. [2020-10-05 22:18:58,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-10-05 22:18:58,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 626 transitions. [2020-10-05 22:18:58,279 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 626 transitions. Word has length 13 [2020-10-05 22:18:58,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:58,279 INFO L479 AbstractCegarLoop]: Abstraction has 240 states and 626 transitions. [2020-10-05 22:18:58,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-05 22:18:58,279 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 626 transitions. [2020-10-05 22:18:58,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:18:58,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:58,280 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:58,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:58,490 INFO L427 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:58,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:58,490 INFO L82 PathProgramCache]: Analyzing trace with hash 2094057644, now seen corresponding path program 113 times [2020-10-05 22:18:58,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:58,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844836834] [2020-10-05 22:18:58,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:58,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:58,612 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:58,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844836834] [2020-10-05 22:18:58,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736347269] [2020-10-05 22:18:58,612 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:58,652 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-05 22:18:58,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:18:58,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:18:58,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:58,845 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:58,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:58,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:18:58,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750475379] [2020-10-05 22:18:58,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:18:58,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:58,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:18:58,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:18:58,848 INFO L87 Difference]: Start difference. First operand 240 states and 626 transitions. Second operand 17 states. [2020-10-05 22:18:58,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:58,944 INFO L93 Difference]: Finished difference Result 275 states and 692 transitions. [2020-10-05 22:18:58,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-05 22:18:58,945 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:18:58,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:58,946 INFO L225 Difference]: With dead ends: 275 [2020-10-05 22:18:58,946 INFO L226 Difference]: Without dead ends: 273 [2020-10-05 22:18:58,947 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:18:58,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-10-05 22:18:58,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 250. [2020-10-05 22:18:58,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-10-05 22:18:58,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 654 transitions. [2020-10-05 22:18:58,952 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 654 transitions. Word has length 14 [2020-10-05 22:18:58,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:58,952 INFO L479 AbstractCegarLoop]: Abstraction has 250 states and 654 transitions. [2020-10-05 22:18:58,952 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:18:58,952 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 654 transitions. [2020-10-05 22:18:58,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:18:58,953 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:58,953 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:18:59,164 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:59,164 INFO L427 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:18:59,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:18:59,165 INFO L82 PathProgramCache]: Analyzing trace with hash 2094058605, now seen corresponding path program 114 times [2020-10-05 22:18:59,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:18:59,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14655792] [2020-10-05 22:18:59,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:18:59,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:18:59,318 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:59,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14655792] [2020-10-05 22:18:59,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639576006] [2020-10-05 22:18:59,319 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:18:59,368 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-05 22:18:59,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:18:59,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:18:59,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:18:59,549 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:18:59,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:18:59,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:18:59,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367303234] [2020-10-05 22:18:59,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:18:59,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:18:59,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:18:59,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:18:59,551 INFO L87 Difference]: Start difference. First operand 250 states and 654 transitions. Second operand 17 states. [2020-10-05 22:18:59,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:18:59,793 INFO L93 Difference]: Finished difference Result 295 states and 735 transitions. [2020-10-05 22:18:59,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-05 22:18:59,794 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:18:59,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:18:59,796 INFO L225 Difference]: With dead ends: 295 [2020-10-05 22:18:59,796 INFO L226 Difference]: Without dead ends: 292 [2020-10-05 22:18:59,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-10-05 22:18:59,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-10-05 22:18:59,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 251. [2020-10-05 22:18:59,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2020-10-05 22:18:59,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 657 transitions. [2020-10-05 22:18:59,809 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 657 transitions. Word has length 14 [2020-10-05 22:18:59,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:18:59,809 INFO L479 AbstractCegarLoop]: Abstraction has 251 states and 657 transitions. [2020-10-05 22:18:59,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:18:59,809 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 657 transitions. [2020-10-05 22:18:59,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:18:59,810 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:18:59,810 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:19:00,021 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:00,022 INFO L427 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:19:00,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:19:00,022 INFO L82 PathProgramCache]: Analyzing trace with hash 2094087435, now seen corresponding path program 115 times [2020-10-05 22:19:00,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:19:00,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029678141] [2020-10-05 22:19:00,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:19:00,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:19:00,134 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:00,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029678141] [2020-10-05 22:19:00,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972072334] [2020-10-05 22:19:00,135 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:00,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:19:00,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:19:00,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:19:00,421 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:00,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:19:00,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:19:00,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713623369] [2020-10-05 22:19:00,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:19:00,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:19:00,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:19:00,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:19:00,422 INFO L87 Difference]: Start difference. First operand 251 states and 657 transitions. Second operand 17 states. [2020-10-05 22:19:00,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:19:00,703 INFO L93 Difference]: Finished difference Result 320 states and 793 transitions. [2020-10-05 22:19:00,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-05 22:19:00,704 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:19:00,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:19:00,705 INFO L225 Difference]: With dead ends: 320 [2020-10-05 22:19:00,705 INFO L226 Difference]: Without dead ends: 316 [2020-10-05 22:19:00,705 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=174, Invalid=332, Unknown=0, NotChecked=0, Total=506 [2020-10-05 22:19:00,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-10-05 22:19:00,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 253. [2020-10-05 22:19:00,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-10-05 22:19:00,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 663 transitions. [2020-10-05 22:19:00,711 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 663 transitions. Word has length 14 [2020-10-05 22:19:00,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:19:00,711 INFO L479 AbstractCegarLoop]: Abstraction has 253 states and 663 transitions. [2020-10-05 22:19:00,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:19:00,711 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 663 transitions. [2020-10-05 22:19:00,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:19:00,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:19:00,712 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:19:00,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:00,923 INFO L427 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:19:00,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:19:00,924 INFO L82 PathProgramCache]: Analyzing trace with hash 2094981165, now seen corresponding path program 116 times [2020-10-05 22:19:00,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:19:00,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854010581] [2020-10-05 22:19:00,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:19:00,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:19:01,039 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:01,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854010581] [2020-10-05 22:19:01,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720282197] [2020-10-05 22:19:01,040 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:01,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:19:01,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:19:01,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:19:01,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:19:01,315 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:01,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:19:01,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:19:01,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749458927] [2020-10-05 22:19:01,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:19:01,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:19:01,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:19:01,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:19:01,316 INFO L87 Difference]: Start difference. First operand 253 states and 663 transitions. Second operand 17 states. [2020-10-05 22:19:01,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:19:01,636 INFO L93 Difference]: Finished difference Result 316 states and 781 transitions. [2020-10-05 22:19:01,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-05 22:19:01,636 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:19:01,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:19:01,637 INFO L225 Difference]: With dead ends: 316 [2020-10-05 22:19:01,638 INFO L226 Difference]: Without dead ends: 313 [2020-10-05 22:19:01,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-10-05 22:19:01,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-10-05 22:19:01,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 255. [2020-10-05 22:19:01,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2020-10-05 22:19:01,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 669 transitions. [2020-10-05 22:19:01,642 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 669 transitions. Word has length 14 [2020-10-05 22:19:01,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:19:01,642 INFO L479 AbstractCegarLoop]: Abstraction has 255 states and 669 transitions. [2020-10-05 22:19:01,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:19:01,642 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 669 transitions. [2020-10-05 22:19:01,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:19:01,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:19:01,643 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:19:01,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2020-10-05 22:19:01,844 INFO L427 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:19:01,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:19:01,844 INFO L82 PathProgramCache]: Analyzing trace with hash 2094982126, now seen corresponding path program 117 times [2020-10-05 22:19:01,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:19:01,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094787881] [2020-10-05 22:19:01,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:19:01,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:19:01,958 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:01,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094787881] [2020-10-05 22:19:01,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969483415] [2020-10-05 22:19:01,959 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:01,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-05 22:19:01,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:19:01,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:19:01,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:19:04,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:04,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:19:04,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:19:04,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012891808] [2020-10-05 22:19:04,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:19:04,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:19:04,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:19:04,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=187, Unknown=1, NotChecked=0, Total=272 [2020-10-05 22:19:04,879 INFO L87 Difference]: Start difference. First operand 255 states and 669 transitions. Second operand 17 states. [2020-10-05 22:19:09,082 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-05 22:19:10,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:19:10,118 INFO L93 Difference]: Finished difference Result 342 states and 843 transitions. [2020-10-05 22:19:10,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-05 22:19:10,119 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:19:10,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:19:10,120 INFO L225 Difference]: With dead ends: 342 [2020-10-05 22:19:10,120 INFO L226 Difference]: Without dead ends: 337 [2020-10-05 22:19:10,121 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=183, Invalid=368, Unknown=1, NotChecked=0, Total=552 [2020-10-05 22:19:10,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-10-05 22:19:10,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 256. [2020-10-05 22:19:10,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-10-05 22:19:10,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 672 transitions. [2020-10-05 22:19:10,124 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 672 transitions. Word has length 14 [2020-10-05 22:19:10,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:19:10,125 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 672 transitions. [2020-10-05 22:19:10,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:19:10,125 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 672 transitions. [2020-10-05 22:19:10,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:19:10,125 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:19:10,125 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:19:10,326 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-10-05 22:19:10,326 INFO L427 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:19:10,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:19:10,327 INFO L82 PathProgramCache]: Analyzing trace with hash 2095010956, now seen corresponding path program 118 times [2020-10-05 22:19:10,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:19:10,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104337852] [2020-10-05 22:19:10,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:19:10,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:19:10,439 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:10,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104337852] [2020-10-05 22:19:10,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367709963] [2020-10-05 22:19:10,440 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:10,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:19:10,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:19:10,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:19:10,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:19:10,772 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:10,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:19:10,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:19:10,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129839071] [2020-10-05 22:19:10,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:19:10,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:19:10,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:19:10,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:19:10,774 INFO L87 Difference]: Start difference. First operand 256 states and 672 transitions. Second operand 17 states. [2020-10-05 22:19:11,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:19:11,122 INFO L93 Difference]: Finished difference Result 331 states and 819 transitions. [2020-10-05 22:19:11,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-05 22:19:11,122 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:19:11,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:19:11,123 INFO L225 Difference]: With dead ends: 331 [2020-10-05 22:19:11,123 INFO L226 Difference]: Without dead ends: 327 [2020-10-05 22:19:11,124 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-10-05 22:19:11,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-10-05 22:19:11,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 256. [2020-10-05 22:19:11,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-10-05 22:19:11,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 672 transitions. [2020-10-05 22:19:11,128 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 672 transitions. Word has length 14 [2020-10-05 22:19:11,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:19:11,128 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 672 transitions. [2020-10-05 22:19:11,128 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:19:11,129 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 672 transitions. [2020-10-05 22:19:11,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:19:11,129 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:19:11,129 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:19:11,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-10-05 22:19:11,330 INFO L427 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:19:11,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:19:11,330 INFO L82 PathProgramCache]: Analyzing trace with hash 2122686795, now seen corresponding path program 119 times [2020-10-05 22:19:11,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:19:11,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333097009] [2020-10-05 22:19:11,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:19:11,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:19:11,443 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:11,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333097009] [2020-10-05 22:19:11,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200273875] [2020-10-05 22:19:11,444 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:11,484 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-05 22:19:11,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:19:11,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:19:11,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:19:11,671 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:11,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:19:11,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:19:11,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550454122] [2020-10-05 22:19:11,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:19:11,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:19:11,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:19:11,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:19:11,673 INFO L87 Difference]: Start difference. First operand 256 states and 672 transitions. Second operand 17 states. [2020-10-05 22:19:12,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:19:12,023 INFO L93 Difference]: Finished difference Result 321 states and 792 transitions. [2020-10-05 22:19:12,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-05 22:19:12,024 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:19:12,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:19:12,026 INFO L225 Difference]: With dead ends: 321 [2020-10-05 22:19:12,026 INFO L226 Difference]: Without dead ends: 318 [2020-10-05 22:19:12,026 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2020-10-05 22:19:12,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-10-05 22:19:12,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 259. [2020-10-05 22:19:12,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-05 22:19:12,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 681 transitions. [2020-10-05 22:19:12,032 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 681 transitions. Word has length 14 [2020-10-05 22:19:12,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:19:12,032 INFO L479 AbstractCegarLoop]: Abstraction has 259 states and 681 transitions. [2020-10-05 22:19:12,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:19:12,032 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 681 transitions. [2020-10-05 22:19:12,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:19:12,033 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:19:12,033 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:19:12,244 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-10-05 22:19:12,244 INFO L427 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:19:12,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:19:12,245 INFO L82 PathProgramCache]: Analyzing trace with hash 2122687756, now seen corresponding path program 120 times [2020-10-05 22:19:12,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:19:12,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042905995] [2020-10-05 22:19:12,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:19:12,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:19:12,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:12,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042905995] [2020-10-05 22:19:12,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891536216] [2020-10-05 22:19:12,353 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:12,394 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-05 22:19:12,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:19:12,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:19:12,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:19:12,581 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:12,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:19:12,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:19:12,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953930295] [2020-10-05 22:19:12,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:19:12,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:19:12,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:19:12,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:19:12,583 INFO L87 Difference]: Start difference. First operand 259 states and 681 transitions. Second operand 17 states. [2020-10-05 22:19:12,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:19:12,956 INFO L93 Difference]: Finished difference Result 348 states and 857 transitions. [2020-10-05 22:19:12,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 22:19:12,957 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:19:12,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:19:12,958 INFO L225 Difference]: With dead ends: 348 [2020-10-05 22:19:12,958 INFO L226 Difference]: Without dead ends: 343 [2020-10-05 22:19:12,958 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-10-05 22:19:12,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2020-10-05 22:19:12,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 260. [2020-10-05 22:19:12,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-10-05 22:19:12,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 684 transitions. [2020-10-05 22:19:12,962 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 684 transitions. Word has length 14 [2020-10-05 22:19:12,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:19:12,963 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 684 transitions. [2020-10-05 22:19:12,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:19:12,963 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 684 transitions. [2020-10-05 22:19:12,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:19:12,963 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:19:12,963 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:19:13,164 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-10-05 22:19:13,164 INFO L427 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:19:13,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:19:13,165 INFO L82 PathProgramCache]: Analyzing trace with hash 2122716586, now seen corresponding path program 121 times [2020-10-05 22:19:13,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:19:13,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317084397] [2020-10-05 22:19:13,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:19:13,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:19:13,281 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:13,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317084397] [2020-10-05 22:19:13,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531848340] [2020-10-05 22:19:13,281 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:13,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:19:13,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:19:13,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:19:13,476 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:13,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:19:13,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:19:13,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558226901] [2020-10-05 22:19:13,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:19:13,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:19:13,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:19:13,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:19:13,478 INFO L87 Difference]: Start difference. First operand 260 states and 684 transitions. Second operand 17 states. [2020-10-05 22:19:13,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:19:13,819 INFO L93 Difference]: Finished difference Result 349 states and 864 transitions. [2020-10-05 22:19:13,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 22:19:13,820 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:19:13,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:19:13,821 INFO L225 Difference]: With dead ends: 349 [2020-10-05 22:19:13,821 INFO L226 Difference]: Without dead ends: 344 [2020-10-05 22:19:13,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-10-05 22:19:13,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2020-10-05 22:19:13,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 259. [2020-10-05 22:19:13,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-05 22:19:13,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 681 transitions. [2020-10-05 22:19:13,825 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 681 transitions. Word has length 14 [2020-10-05 22:19:13,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:19:13,825 INFO L479 AbstractCegarLoop]: Abstraction has 259 states and 681 transitions. [2020-10-05 22:19:13,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:19:13,825 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 681 transitions. [2020-10-05 22:19:13,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:19:13,826 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:19:13,826 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:19:14,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2020-10-05 22:19:14,027 INFO L427 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:19:14,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:19:14,027 INFO L82 PathProgramCache]: Analyzing trace with hash 2123641068, now seen corresponding path program 122 times [2020-10-05 22:19:14,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:19:14,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189765577] [2020-10-05 22:19:14,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:19:14,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:19:14,138 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:14,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189765577] [2020-10-05 22:19:14,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626415513] [2020-10-05 22:19:14,139 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:14,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:19:14,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:19:14,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:19:14,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:19:14,334 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:14,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:19:14,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:19:14,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257442540] [2020-10-05 22:19:14,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:19:14,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:19:14,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:19:14,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:19:14,336 INFO L87 Difference]: Start difference. First operand 259 states and 681 transitions. Second operand 17 states. [2020-10-05 22:19:14,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:19:14,639 INFO L93 Difference]: Finished difference Result 332 states and 822 transitions. [2020-10-05 22:19:14,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-05 22:19:14,640 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:19:14,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:19:14,640 INFO L225 Difference]: With dead ends: 332 [2020-10-05 22:19:14,640 INFO L226 Difference]: Without dead ends: 314 [2020-10-05 22:19:14,641 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-10-05 22:19:14,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-10-05 22:19:14,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 260. [2020-10-05 22:19:14,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-10-05 22:19:14,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 677 transitions. [2020-10-05 22:19:14,644 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 677 transitions. Word has length 14 [2020-10-05 22:19:14,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:19:14,645 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 677 transitions. [2020-10-05 22:19:14,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:19:14,645 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 677 transitions. [2020-10-05 22:19:14,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:19:14,645 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:19:14,645 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:19:14,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:14,848 INFO L427 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:19:14,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:19:14,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1313405971, now seen corresponding path program 123 times [2020-10-05 22:19:14,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:19:14,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467078182] [2020-10-05 22:19:14,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:19:14,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:19:14,971 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:14,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467078182] [2020-10-05 22:19:14,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51474390] [2020-10-05 22:19:14,972 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:15,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-05 22:19:15,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:19:15,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:19:15,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:19:15,179 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:15,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:19:15,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:19:15,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630649593] [2020-10-05 22:19:15,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:19:15,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:19:15,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:19:15,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:19:15,181 INFO L87 Difference]: Start difference. First operand 260 states and 677 transitions. Second operand 17 states. [2020-10-05 22:19:15,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:19:15,462 INFO L93 Difference]: Finished difference Result 315 states and 779 transitions. [2020-10-05 22:19:15,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-05 22:19:15,463 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:19:15,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:19:15,464 INFO L225 Difference]: With dead ends: 315 [2020-10-05 22:19:15,464 INFO L226 Difference]: Without dead ends: 312 [2020-10-05 22:19:15,464 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-10-05 22:19:15,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-10-05 22:19:15,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 265. [2020-10-05 22:19:15,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-10-05 22:19:15,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 690 transitions. [2020-10-05 22:19:15,468 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 690 transitions. Word has length 14 [2020-10-05 22:19:15,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:19:15,469 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 690 transitions. [2020-10-05 22:19:15,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:19:15,469 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 690 transitions. [2020-10-05 22:19:15,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:19:15,475 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:19:15,475 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:19:15,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:15,676 INFO L427 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:19:15,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:19:15,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1313405010, now seen corresponding path program 124 times [2020-10-05 22:19:15,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:19:15,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162019224] [2020-10-05 22:19:15,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:19:15,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:19:15,797 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:15,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162019224] [2020-10-05 22:19:15,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251329964] [2020-10-05 22:19:15,798 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:15,837 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:19:15,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:19:15,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:19:15,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:19:16,015 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:16,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:19:16,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:19:16,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454347952] [2020-10-05 22:19:16,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:19:16,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:19:16,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:19:16,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:19:16,016 INFO L87 Difference]: Start difference. First operand 265 states and 690 transitions. Second operand 17 states. [2020-10-05 22:19:16,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:19:16,320 INFO L93 Difference]: Finished difference Result 334 states and 821 transitions. [2020-10-05 22:19:16,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-05 22:19:16,320 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:19:16,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:19:16,321 INFO L225 Difference]: With dead ends: 334 [2020-10-05 22:19:16,321 INFO L226 Difference]: Without dead ends: 330 [2020-10-05 22:19:16,321 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2020-10-05 22:19:16,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-10-05 22:19:16,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 264. [2020-10-05 22:19:16,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-05 22:19:16,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 687 transitions. [2020-10-05 22:19:16,327 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 687 transitions. Word has length 14 [2020-10-05 22:19:16,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:19:16,328 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 687 transitions. [2020-10-05 22:19:16,328 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:19:16,328 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 687 transitions. [2020-10-05 22:19:16,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:19:16,328 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:19:16,328 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:19:16,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:16,532 INFO L427 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:19:16,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:19:16,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1313376180, now seen corresponding path program 125 times [2020-10-05 22:19:16,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:19:16,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39199226] [2020-10-05 22:19:16,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:19:16,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:19:16,655 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:16,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39199226] [2020-10-05 22:19:16,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98524173] [2020-10-05 22:19:16,656 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:16,693 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-05 22:19:16,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:19:16,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:19:16,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:19:17,552 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:17,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:19:17,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:19:17,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034601808] [2020-10-05 22:19:17,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:19:17,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:19:17,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:19:17,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:19:17,554 INFO L87 Difference]: Start difference. First operand 264 states and 687 transitions. Second operand 17 states. [2020-10-05 22:19:17,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:19:17,935 INFO L93 Difference]: Finished difference Result 351 states and 859 transitions. [2020-10-05 22:19:17,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 22:19:17,936 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:19:17,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:19:17,944 INFO L225 Difference]: With dead ends: 351 [2020-10-05 22:19:17,944 INFO L226 Difference]: Without dead ends: 346 [2020-10-05 22:19:17,944 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=197, Invalid=403, Unknown=0, NotChecked=0, Total=600 [2020-10-05 22:19:17,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-10-05 22:19:17,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 269. [2020-10-05 22:19:17,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-10-05 22:19:17,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 700 transitions. [2020-10-05 22:19:17,948 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 700 transitions. Word has length 14 [2020-10-05 22:19:17,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:19:17,948 INFO L479 AbstractCegarLoop]: Abstraction has 269 states and 700 transitions. [2020-10-05 22:19:17,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:19:17,948 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 700 transitions. [2020-10-05 22:19:17,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:19:17,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:19:17,949 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:19:18,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:18,151 INFO L427 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:19:18,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:19:18,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1312481489, now seen corresponding path program 126 times [2020-10-05 22:19:18,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:19:18,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008658381] [2020-10-05 22:19:18,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:19:18,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:19:18,263 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:18,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008658381] [2020-10-05 22:19:18,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021926017] [2020-10-05 22:19:18,264 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:18,301 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-05 22:19:18,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:19:18,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:19:18,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:19:18,464 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:18,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:19:18,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:19:18,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804586046] [2020-10-05 22:19:18,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:19:18,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:19:18,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:19:18,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:19:18,465 INFO L87 Difference]: Start difference. First operand 269 states and 700 transitions. Second operand 17 states. [2020-10-05 22:19:18,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:19:18,766 INFO L93 Difference]: Finished difference Result 357 states and 870 transitions. [2020-10-05 22:19:18,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 22:19:18,767 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:19:18,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:19:18,768 INFO L225 Difference]: With dead ends: 357 [2020-10-05 22:19:18,768 INFO L226 Difference]: Without dead ends: 339 [2020-10-05 22:19:18,769 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-10-05 22:19:18,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2020-10-05 22:19:18,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 269. [2020-10-05 22:19:18,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-10-05 22:19:18,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 696 transitions. [2020-10-05 22:19:18,773 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 696 transitions. Word has length 14 [2020-10-05 22:19:18,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:19:18,773 INFO L479 AbstractCegarLoop]: Abstraction has 269 states and 696 transitions. [2020-10-05 22:19:18,773 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:19:18,773 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 696 transitions. [2020-10-05 22:19:18,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:19:18,773 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:19:18,774 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:19:18,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:18,974 INFO L427 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:19:18,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:19:18,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1284776820, now seen corresponding path program 127 times [2020-10-05 22:19:18,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:19:18,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430824516] [2020-10-05 22:19:18,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:19:18,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:19:19,110 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:19,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430824516] [2020-10-05 22:19:19,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676717190] [2020-10-05 22:19:19,110 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:19,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:19:19,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:19:19,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:19:19,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:19,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:19:19,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:19:19,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207420614] [2020-10-05 22:19:19,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:19:19,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:19:19,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:19:19,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:19:19,346 INFO L87 Difference]: Start difference. First operand 269 states and 696 transitions. Second operand 17 states. [2020-10-05 22:19:19,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:19:19,664 INFO L93 Difference]: Finished difference Result 332 states and 820 transitions. [2020-10-05 22:19:19,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-05 22:19:19,665 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:19:19,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:19:19,665 INFO L225 Difference]: With dead ends: 332 [2020-10-05 22:19:19,666 INFO L226 Difference]: Without dead ends: 327 [2020-10-05 22:19:19,666 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2020-10-05 22:19:19,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-10-05 22:19:19,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 266. [2020-10-05 22:19:19,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-05 22:19:19,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 689 transitions. [2020-10-05 22:19:19,675 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 689 transitions. Word has length 14 [2020-10-05 22:19:19,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:19:19,676 INFO L479 AbstractCegarLoop]: Abstraction has 266 states and 689 transitions. [2020-10-05 22:19:19,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:19:19,676 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 689 transitions. [2020-10-05 22:19:19,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:19:19,676 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:19:19,676 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:19:19,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-10-05 22:19:19,877 INFO L427 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:19:19,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:19:19,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1283823508, now seen corresponding path program 128 times [2020-10-05 22:19:19,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:19:19,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604446633] [2020-10-05 22:19:19,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:19:19,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:19:20,035 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:20,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604446633] [2020-10-05 22:19:20,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244733026] [2020-10-05 22:19:20,036 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:20,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:19:20,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:19:20,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:19:20,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:19:20,250 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:20,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:19:20,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:19:20,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783970966] [2020-10-05 22:19:20,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:19:20,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:19:20,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:19:20,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:19:20,252 INFO L87 Difference]: Start difference. First operand 266 states and 689 transitions. Second operand 17 states. [2020-10-05 22:19:20,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:19:20,441 INFO L93 Difference]: Finished difference Result 322 states and 792 transitions. [2020-10-05 22:19:20,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-05 22:19:20,442 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:19:20,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:19:20,443 INFO L225 Difference]: With dead ends: 322 [2020-10-05 22:19:20,443 INFO L226 Difference]: Without dead ends: 309 [2020-10-05 22:19:20,443 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-10-05 22:19:20,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-10-05 22:19:20,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 268. [2020-10-05 22:19:20,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-05 22:19:20,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 691 transitions. [2020-10-05 22:19:20,447 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 691 transitions. Word has length 14 [2020-10-05 22:19:20,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:19:20,448 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 691 transitions. [2020-10-05 22:19:20,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:19:20,448 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 691 transitions. [2020-10-05 22:19:20,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:19:20,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:19:20,448 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:19:20,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-10-05 22:19:20,649 INFO L427 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:19:20,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:19:20,650 INFO L82 PathProgramCache]: Analyzing trace with hash 291274206, now seen corresponding path program 129 times [2020-10-05 22:19:20,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:19:20,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90320923] [2020-10-05 22:19:20,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:19:20,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:19:20,839 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:20,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90320923] [2020-10-05 22:19:20,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291472781] [2020-10-05 22:19:20,840 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:20,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-05 22:19:20,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:19:20,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:19:20,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:19:21,049 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:21,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:19:21,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:19:21,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478856699] [2020-10-05 22:19:21,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:19:21,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:19:21,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:19:21,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:19:21,051 INFO L87 Difference]: Start difference. First operand 268 states and 691 transitions. Second operand 17 states. [2020-10-05 22:19:21,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:19:21,122 INFO L93 Difference]: Finished difference Result 305 states and 753 transitions. [2020-10-05 22:19:21,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-05 22:19:21,122 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:19:21,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:19:21,123 INFO L225 Difference]: With dead ends: 305 [2020-10-05 22:19:21,123 INFO L226 Difference]: Without dead ends: 303 [2020-10-05 22:19:21,123 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-10-05 22:19:21,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2020-10-05 22:19:21,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 274. [2020-10-05 22:19:21,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-10-05 22:19:21,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 709 transitions. [2020-10-05 22:19:21,127 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 709 transitions. Word has length 14 [2020-10-05 22:19:21,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:19:21,127 INFO L479 AbstractCegarLoop]: Abstraction has 274 states and 709 transitions. [2020-10-05 22:19:21,128 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:19:21,128 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 709 transitions. [2020-10-05 22:19:21,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:19:21,128 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:19:21,128 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:19:21,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-10-05 22:19:21,336 INFO L427 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:19:21,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:19:21,337 INFO L82 PathProgramCache]: Analyzing trace with hash 291275167, now seen corresponding path program 130 times [2020-10-05 22:19:21,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:19:21,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986689089] [2020-10-05 22:19:21,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:19:21,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:19:21,510 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:21,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986689089] [2020-10-05 22:19:21,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056148045] [2020-10-05 22:19:21,510 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:21,548 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:19:21,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:19:21,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:19:21,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:19:21,730 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:21,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:19:21,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:19:21,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410582063] [2020-10-05 22:19:21,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:19:21,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:19:21,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:19:21,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:19:21,732 INFO L87 Difference]: Start difference. First operand 274 states and 709 transitions. Second operand 17 states. [2020-10-05 22:19:21,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:19:21,994 INFO L93 Difference]: Finished difference Result 325 states and 802 transitions. [2020-10-05 22:19:21,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 22:19:21,995 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:19:21,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:19:21,996 INFO L225 Difference]: With dead ends: 325 [2020-10-05 22:19:21,996 INFO L226 Difference]: Without dead ends: 322 [2020-10-05 22:19:21,996 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-05 22:19:21,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-10-05 22:19:22,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 272. [2020-10-05 22:19:22,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-10-05 22:19:22,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 703 transitions. [2020-10-05 22:19:22,000 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 703 transitions. Word has length 14 [2020-10-05 22:19:22,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:19:22,000 INFO L479 AbstractCegarLoop]: Abstraction has 272 states and 703 transitions. [2020-10-05 22:19:22,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:19:22,001 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 703 transitions. [2020-10-05 22:19:22,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:19:22,001 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:19:22,001 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:19:22,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-10-05 22:19:22,202 INFO L427 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:19:22,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:19:22,202 INFO L82 PathProgramCache]: Analyzing trace with hash 291303997, now seen corresponding path program 131 times [2020-10-05 22:19:22,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:19:22,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826450494] [2020-10-05 22:19:22,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:19:22,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:19:22,345 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:22,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826450494] [2020-10-05 22:19:22,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943713689] [2020-10-05 22:19:22,346 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:22,399 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-05 22:19:22,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:19:22,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:19:22,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:19:22,659 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:22,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:19:22,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:19:22,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636961046] [2020-10-05 22:19:22,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:19:22,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:19:22,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:19:22,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:19:22,660 INFO L87 Difference]: Start difference. First operand 272 states and 703 transitions. Second operand 17 states. [2020-10-05 22:19:22,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:19:22,981 INFO L93 Difference]: Finished difference Result 348 states and 857 transitions. [2020-10-05 22:19:22,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 22:19:22,981 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:19:22,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:19:22,982 INFO L225 Difference]: With dead ends: 348 [2020-10-05 22:19:22,982 INFO L226 Difference]: Without dead ends: 344 [2020-10-05 22:19:22,982 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-10-05 22:19:22,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2020-10-05 22:19:22,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 270. [2020-10-05 22:19:22,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-10-05 22:19:22,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 697 transitions. [2020-10-05 22:19:22,986 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 697 transitions. Word has length 14 [2020-10-05 22:19:22,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:19:22,986 INFO L479 AbstractCegarLoop]: Abstraction has 270 states and 697 transitions. [2020-10-05 22:19:22,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:19:22,987 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 697 transitions. [2020-10-05 22:19:22,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:19:22,987 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:19:22,987 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:19:23,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:23,188 INFO L427 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:19:23,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:19:23,188 INFO L82 PathProgramCache]: Analyzing trace with hash 292197727, now seen corresponding path program 132 times [2020-10-05 22:19:23,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:19:23,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283785293] [2020-10-05 22:19:23,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:19:23,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:19:23,321 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:23,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283785293] [2020-10-05 22:19:23,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656083621] [2020-10-05 22:19:23,321 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:23,361 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-05 22:19:23,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:19:23,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:19:23,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:19:25,561 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:25,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:19:25,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:19:25,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288236373] [2020-10-05 22:19:25,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:19:25,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:19:25,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:19:25,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:19:25,563 INFO L87 Difference]: Start difference. First operand 270 states and 697 transitions. Second operand 17 states. [2020-10-05 22:19:25,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:19:25,948 INFO L93 Difference]: Finished difference Result 338 states and 827 transitions. [2020-10-05 22:19:25,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-05 22:19:25,948 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:19:25,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:19:25,949 INFO L225 Difference]: With dead ends: 338 [2020-10-05 22:19:25,949 INFO L226 Difference]: Without dead ends: 335 [2020-10-05 22:19:25,949 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=208, Invalid=442, Unknown=0, NotChecked=0, Total=650 [2020-10-05 22:19:25,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-10-05 22:19:25,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 272. [2020-10-05 22:19:25,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-10-05 22:19:25,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 703 transitions. [2020-10-05 22:19:25,953 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 703 transitions. Word has length 14 [2020-10-05 22:19:25,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:19:25,953 INFO L479 AbstractCegarLoop]: Abstraction has 272 states and 703 transitions. [2020-10-05 22:19:25,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:19:25,954 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 703 transitions. [2020-10-05 22:19:25,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:19:25,954 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:19:25,954 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:19:26,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:26,162 INFO L427 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:19:26,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:19:26,163 INFO L82 PathProgramCache]: Analyzing trace with hash 292198688, now seen corresponding path program 133 times [2020-10-05 22:19:26,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:19:26,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764119201] [2020-10-05 22:19:26,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:19:26,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:19:26,315 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:26,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764119201] [2020-10-05 22:19:26,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163861875] [2020-10-05 22:19:26,316 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:26,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:19:26,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:19:26,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:19:30,509 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:30,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:19:30,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:19:30,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115688526] [2020-10-05 22:19:30,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:19:30,510 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:19:30,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:19:30,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=200, Unknown=1, NotChecked=0, Total=272 [2020-10-05 22:19:30,511 INFO L87 Difference]: Start difference. First operand 272 states and 703 transitions. Second operand 17 states. [2020-10-05 22:19:34,751 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-05 22:19:35,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:19:35,096 INFO L93 Difference]: Finished difference Result 369 states and 902 transitions. [2020-10-05 22:19:35,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-05 22:19:35,097 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:19:35,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:19:35,097 INFO L225 Difference]: With dead ends: 369 [2020-10-05 22:19:35,097 INFO L226 Difference]: Without dead ends: 364 [2020-10-05 22:19:35,098 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=205, Invalid=444, Unknown=1, NotChecked=0, Total=650 [2020-10-05 22:19:35,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2020-10-05 22:19:35,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 272. [2020-10-05 22:19:35,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-10-05 22:19:35,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 703 transitions. [2020-10-05 22:19:35,103 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 703 transitions. Word has length 14 [2020-10-05 22:19:35,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:19:35,103 INFO L479 AbstractCegarLoop]: Abstraction has 272 states and 703 transitions. [2020-10-05 22:19:35,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:19:35,103 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 703 transitions. [2020-10-05 22:19:35,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:19:35,104 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:19:35,104 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:19:35,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2020-10-05 22:19:35,306 INFO L427 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:19:35,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:19:35,306 INFO L82 PathProgramCache]: Analyzing trace with hash 292227518, now seen corresponding path program 134 times [2020-10-05 22:19:35,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:19:35,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173789775] [2020-10-05 22:19:35,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:19:35,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:19:35,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:35,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173789775] [2020-10-05 22:19:35,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442989612] [2020-10-05 22:19:35,448 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:35,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:19:35,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:19:35,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:19:35,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:19:35,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:35,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:19:35,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:19:35,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473435480] [2020-10-05 22:19:35,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:19:35,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:19:35,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:19:35,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:19:35,749 INFO L87 Difference]: Start difference. First operand 272 states and 703 transitions. Second operand 17 states. [2020-10-05 22:19:36,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:19:36,215 INFO L93 Difference]: Finished difference Result 352 states and 862 transitions. [2020-10-05 22:19:36,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-05 22:19:36,216 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:19:36,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:19:36,217 INFO L225 Difference]: With dead ends: 352 [2020-10-05 22:19:36,217 INFO L226 Difference]: Without dead ends: 348 [2020-10-05 22:19:36,218 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-10-05 22:19:36,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-10-05 22:19:36,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 268. [2020-10-05 22:19:36,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-05 22:19:36,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 691 transitions. [2020-10-05 22:19:36,223 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 691 transitions. Word has length 14 [2020-10-05 22:19:36,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:19:36,223 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 691 transitions. [2020-10-05 22:19:36,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:19:36,223 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 691 transitions. [2020-10-05 22:19:36,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:19:36,224 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:19:36,224 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:19:36,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:36,425 INFO L427 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:19:36,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:19:36,425 INFO L82 PathProgramCache]: Analyzing trace with hash 319903357, now seen corresponding path program 135 times [2020-10-05 22:19:36,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:19:36,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327532995] [2020-10-05 22:19:36,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:19:36,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:19:36,530 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:36,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327532995] [2020-10-05 22:19:36,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268202523] [2020-10-05 22:19:36,530 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:36,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-05 22:19:36,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:19:36,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:19:36,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:19:36,764 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:36,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:19:36,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:19:36,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394703823] [2020-10-05 22:19:36,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:19:36,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:19:36,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:19:36,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:19:36,766 INFO L87 Difference]: Start difference. First operand 268 states and 691 transitions. Second operand 17 states. [2020-10-05 22:19:37,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:19:37,202 INFO L93 Difference]: Finished difference Result 330 states and 806 transitions. [2020-10-05 22:19:37,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-05 22:19:37,202 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:19:37,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:19:37,203 INFO L225 Difference]: With dead ends: 330 [2020-10-05 22:19:37,203 INFO L226 Difference]: Without dead ends: 327 [2020-10-05 22:19:37,203 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2020-10-05 22:19:37,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-10-05 22:19:37,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 271. [2020-10-05 22:19:37,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-05 22:19:37,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 700 transitions. [2020-10-05 22:19:37,208 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 700 transitions. Word has length 14 [2020-10-05 22:19:37,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:19:37,208 INFO L479 AbstractCegarLoop]: Abstraction has 271 states and 700 transitions. [2020-10-05 22:19:37,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:19:37,208 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 700 transitions. [2020-10-05 22:19:37,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:19:37,208 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:19:37,208 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:19:37,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:37,409 INFO L427 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:19:37,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:19:37,410 INFO L82 PathProgramCache]: Analyzing trace with hash 319904318, now seen corresponding path program 136 times [2020-10-05 22:19:37,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:19:37,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265510815] [2020-10-05 22:19:37,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:19:37,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:19:37,521 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:37,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265510815] [2020-10-05 22:19:37,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603246716] [2020-10-05 22:19:37,522 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:37,563 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:19:37,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:19:37,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:19:37,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:19:37,749 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:37,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:19:37,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:19:37,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330973906] [2020-10-05 22:19:37,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:19:37,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:19:37,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:19:37,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:19:37,752 INFO L87 Difference]: Start difference. First operand 271 states and 700 transitions. Second operand 17 states. [2020-10-05 22:19:38,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:19:38,226 INFO L93 Difference]: Finished difference Result 365 states and 887 transitions. [2020-10-05 22:19:38,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-05 22:19:38,227 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:19:38,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:19:38,227 INFO L225 Difference]: With dead ends: 365 [2020-10-05 22:19:38,228 INFO L226 Difference]: Without dead ends: 360 [2020-10-05 22:19:38,228 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=248, Invalid=564, Unknown=0, NotChecked=0, Total=812 [2020-10-05 22:19:38,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2020-10-05 22:19:38,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 272. [2020-10-05 22:19:38,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-10-05 22:19:38,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 703 transitions. [2020-10-05 22:19:38,232 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 703 transitions. Word has length 14 [2020-10-05 22:19:38,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:19:38,232 INFO L479 AbstractCegarLoop]: Abstraction has 272 states and 703 transitions. [2020-10-05 22:19:38,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:19:38,233 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 703 transitions. [2020-10-05 22:19:38,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:19:38,233 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:19:38,233 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:19:38,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:38,434 INFO L427 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:19:38,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:19:38,435 INFO L82 PathProgramCache]: Analyzing trace with hash 319933148, now seen corresponding path program 137 times [2020-10-05 22:19:38,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:19:38,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266639620] [2020-10-05 22:19:38,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:19:38,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:19:38,545 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:38,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266639620] [2020-10-05 22:19:38,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251120724] [2020-10-05 22:19:38,545 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:38,584 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-05 22:19:38,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:19:38,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:19:38,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:19:38,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:38,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:19:38,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:19:38,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030543754] [2020-10-05 22:19:38,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:19:38,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:19:38,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:19:38,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:19:38,750 INFO L87 Difference]: Start difference. First operand 272 states and 703 transitions. Second operand 17 states. [2020-10-05 22:19:39,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:19:39,150 INFO L93 Difference]: Finished difference Result 363 states and 882 transitions. [2020-10-05 22:19:39,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-05 22:19:39,151 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:19:39,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:19:39,152 INFO L225 Difference]: With dead ends: 363 [2020-10-05 22:19:39,152 INFO L226 Difference]: Without dead ends: 358 [2020-10-05 22:19:39,153 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2020-10-05 22:19:39,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-10-05 22:19:39,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 271. [2020-10-05 22:19:39,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-05 22:19:39,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 700 transitions. [2020-10-05 22:19:39,157 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 700 transitions. Word has length 14 [2020-10-05 22:19:39,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:19:39,157 INFO L479 AbstractCegarLoop]: Abstraction has 271 states and 700 transitions. [2020-10-05 22:19:39,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:19:39,157 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 700 transitions. [2020-10-05 22:19:39,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:19:39,158 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:19:39,158 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:19:39,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2020-10-05 22:19:39,360 INFO L427 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:19:39,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:19:39,361 INFO L82 PathProgramCache]: Analyzing trace with hash 320857630, now seen corresponding path program 138 times [2020-10-05 22:19:39,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:19:39,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694901210] [2020-10-05 22:19:39,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:19:39,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:19:39,474 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:39,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694901210] [2020-10-05 22:19:39,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805865347] [2020-10-05 22:19:39,475 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:39,517 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-05 22:19:39,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:19:39,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:19:39,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:19:39,682 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:39,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:19:39,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:19:39,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759907822] [2020-10-05 22:19:39,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:19:39,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:19:39,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:19:39,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:19:39,685 INFO L87 Difference]: Start difference. First operand 271 states and 700 transitions. Second operand 17 states. [2020-10-05 22:19:40,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:19:40,024 INFO L93 Difference]: Finished difference Result 333 states and 812 transitions. [2020-10-05 22:19:40,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-05 22:19:40,025 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:19:40,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:19:40,026 INFO L225 Difference]: With dead ends: 333 [2020-10-05 22:19:40,026 INFO L226 Difference]: Without dead ends: 315 [2020-10-05 22:19:40,026 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-10-05 22:19:40,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-10-05 22:19:40,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 266. [2020-10-05 22:19:40,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-05 22:19:40,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 683 transitions. [2020-10-05 22:19:40,031 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 683 transitions. Word has length 14 [2020-10-05 22:19:40,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:19:40,031 INFO L479 AbstractCegarLoop]: Abstraction has 266 states and 683 transitions. [2020-10-05 22:19:40,031 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:19:40,031 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 683 transitions. [2020-10-05 22:19:40,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:19:40,032 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:19:40,032 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:19:40,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-10-05 22:19:40,233 INFO L427 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:19:40,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:19:40,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1429448084, now seen corresponding path program 139 times [2020-10-05 22:19:40,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:19:40,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659424095] [2020-10-05 22:19:40,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:19:40,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:19:40,398 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:40,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659424095] [2020-10-05 22:19:40,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582464211] [2020-10-05 22:19:40,398 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:40,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:19:40,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:19:40,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:19:40,621 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:40,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:19:40,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:19:40,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299184611] [2020-10-05 22:19:40,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:19:40,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:19:40,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:19:40,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:19:40,623 INFO L87 Difference]: Start difference. First operand 266 states and 683 transitions. Second operand 17 states. [2020-10-05 22:19:40,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:19:40,728 INFO L93 Difference]: Finished difference Result 296 states and 732 transitions. [2020-10-05 22:19:40,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-05 22:19:40,728 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:19:40,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:19:40,729 INFO L225 Difference]: With dead ends: 296 [2020-10-05 22:19:40,729 INFO L226 Difference]: Without dead ends: 294 [2020-10-05 22:19:40,729 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-05 22:19:40,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-10-05 22:19:40,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 270. [2020-10-05 22:19:40,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-10-05 22:19:40,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 695 transitions. [2020-10-05 22:19:40,734 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 695 transitions. Word has length 14 [2020-10-05 22:19:40,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:19:40,734 INFO L479 AbstractCegarLoop]: Abstraction has 270 states and 695 transitions. [2020-10-05 22:19:40,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:19:40,734 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 695 transitions. [2020-10-05 22:19:40,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:19:40,735 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:19:40,735 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:19:40,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-10-05 22:19:40,936 INFO L427 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:19:40,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:19:40,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1429447123, now seen corresponding path program 140 times [2020-10-05 22:19:40,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:19:40,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973957190] [2020-10-05 22:19:40,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:19:40,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:19:41,077 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:41,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973957190] [2020-10-05 22:19:41,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655813279] [2020-10-05 22:19:41,078 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:41,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:19:41,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:19:41,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:19:41,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:19:41,298 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:41,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:19:41,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:19:41,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854847022] [2020-10-05 22:19:41,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:19:41,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:19:41,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:19:41,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:19:41,299 INFO L87 Difference]: Start difference. First operand 270 states and 695 transitions. Second operand 17 states. [2020-10-05 22:19:41,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:19:41,595 INFO L93 Difference]: Finished difference Result 328 states and 803 transitions. [2020-10-05 22:19:41,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-05 22:19:41,596 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:19:41,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:19:41,597 INFO L225 Difference]: With dead ends: 328 [2020-10-05 22:19:41,597 INFO L226 Difference]: Without dead ends: 325 [2020-10-05 22:19:41,597 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2020-10-05 22:19:41,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-10-05 22:19:41,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 268. [2020-10-05 22:19:41,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-05 22:19:41,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 689 transitions. [2020-10-05 22:19:41,601 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 689 transitions. Word has length 14 [2020-10-05 22:19:41,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:19:41,602 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 689 transitions. [2020-10-05 22:19:41,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:19:41,602 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 689 transitions. [2020-10-05 22:19:41,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:19:41,602 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:19:41,602 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:19:41,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-10-05 22:19:41,803 INFO L427 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:19:41,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:19:41,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1429418293, now seen corresponding path program 141 times [2020-10-05 22:19:41,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:19:41,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659880092] [2020-10-05 22:19:41,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:19:41,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:19:41,940 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:41,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659880092] [2020-10-05 22:19:41,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634064881] [2020-10-05 22:19:41,941 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:41,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-05 22:19:41,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:19:41,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:19:41,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:19:42,281 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:42,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:19:42,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:19:42,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931898356] [2020-10-05 22:19:42,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:19:42,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:19:42,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:19:42,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:19:42,283 INFO L87 Difference]: Start difference. First operand 268 states and 689 transitions. Second operand 17 states. [2020-10-05 22:19:42,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:19:42,846 INFO L93 Difference]: Finished difference Result 344 states and 841 transitions. [2020-10-05 22:19:42,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-05 22:19:42,848 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:19:42,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:19:42,849 INFO L225 Difference]: With dead ends: 344 [2020-10-05 22:19:42,849 INFO L226 Difference]: Without dead ends: 340 [2020-10-05 22:19:42,850 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-10-05 22:19:42,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-10-05 22:19:42,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 266. [2020-10-05 22:19:42,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-05 22:19:42,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 683 transitions. [2020-10-05 22:19:42,858 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 683 transitions. Word has length 14 [2020-10-05 22:19:42,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:19:42,859 INFO L479 AbstractCegarLoop]: Abstraction has 266 states and 683 transitions. [2020-10-05 22:19:42,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:19:42,859 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 683 transitions. [2020-10-05 22:19:42,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:19:42,860 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:19:42,860 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:19:43,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-10-05 22:19:43,074 INFO L427 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:19:43,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:19:43,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1428524563, now seen corresponding path program 142 times [2020-10-05 22:19:43,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:19:43,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272053186] [2020-10-05 22:19:43,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:19:43,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:19:43,195 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:43,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272053186] [2020-10-05 22:19:43,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890536827] [2020-10-05 22:19:43,196 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:43,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:19:43,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:19:43,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:19:43,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:19:45,021 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:45,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:19:45,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:19:45,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615194476] [2020-10-05 22:19:45,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:19:45,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:19:45,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:19:45,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:19:45,023 INFO L87 Difference]: Start difference. First operand 266 states and 683 transitions. Second operand 17 states. [2020-10-05 22:19:45,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:19:45,487 INFO L93 Difference]: Finished difference Result 331 states and 805 transitions. [2020-10-05 22:19:45,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-05 22:19:45,487 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:19:45,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:19:45,488 INFO L225 Difference]: With dead ends: 331 [2020-10-05 22:19:45,488 INFO L226 Difference]: Without dead ends: 328 [2020-10-05 22:19:45,489 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=216, Invalid=486, Unknown=0, NotChecked=0, Total=702 [2020-10-05 22:19:45,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-10-05 22:19:45,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 268. [2020-10-05 22:19:45,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-05 22:19:45,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 689 transitions. [2020-10-05 22:19:45,494 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 689 transitions. Word has length 14 [2020-10-05 22:19:45,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:19:45,494 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 689 transitions. [2020-10-05 22:19:45,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:19:45,495 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 689 transitions. [2020-10-05 22:19:45,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:19:45,495 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:19:45,495 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:19:45,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2020-10-05 22:19:45,707 INFO L427 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:19:45,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:19:45,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1428523602, now seen corresponding path program 143 times [2020-10-05 22:19:45,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:19:45,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311750706] [2020-10-05 22:19:45,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:19:45,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:19:45,820 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:45,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311750706] [2020-10-05 22:19:45,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902580817] [2020-10-05 22:19:45,821 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:45,863 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:19:45,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:19:45,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:19:45,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:19:50,186 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:50,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:19:50,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:19:50,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852953840] [2020-10-05 22:19:50,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:19:50,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:19:50,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:19:50,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=208, Unknown=1, NotChecked=0, Total=272 [2020-10-05 22:19:50,187 INFO L87 Difference]: Start difference. First operand 268 states and 689 transitions. Second operand 17 states. [2020-10-05 22:19:54,474 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-05 22:19:54,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:19:54,817 INFO L93 Difference]: Finished difference Result 357 states and 866 transitions. [2020-10-05 22:19:54,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-05 22:19:54,817 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:19:54,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:19:54,818 INFO L225 Difference]: With dead ends: 357 [2020-10-05 22:19:54,818 INFO L226 Difference]: Without dead ends: 352 [2020-10-05 22:19:54,818 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=211, Invalid=490, Unknown=1, NotChecked=0, Total=702 [2020-10-05 22:19:54,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2020-10-05 22:19:54,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 268. [2020-10-05 22:19:54,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-05 22:19:54,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 689 transitions. [2020-10-05 22:19:54,823 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 689 transitions. Word has length 14 [2020-10-05 22:19:54,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:19:54,823 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 689 transitions. [2020-10-05 22:19:54,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:19:54,824 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 689 transitions. [2020-10-05 22:19:54,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:19:54,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:19:54,824 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:19:55,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:55,025 INFO L427 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:19:55,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:19:55,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1428494772, now seen corresponding path program 144 times [2020-10-05 22:19:55,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:19:55,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480060606] [2020-10-05 22:19:55,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:19:55,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:19:55,138 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:55,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480060606] [2020-10-05 22:19:55,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383096729] [2020-10-05 22:19:55,139 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:55,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-05 22:19:55,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:19:55,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:19:55,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:19:55,439 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:55,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:19:55,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:19:55,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421822309] [2020-10-05 22:19:55,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:19:55,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:19:55,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:19:55,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:19:55,441 INFO L87 Difference]: Start difference. First operand 268 states and 689 transitions. Second operand 17 states. [2020-10-05 22:19:55,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:19:55,934 INFO L93 Difference]: Finished difference Result 339 states and 826 transitions. [2020-10-05 22:19:55,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-05 22:19:55,934 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:19:55,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:19:55,935 INFO L225 Difference]: With dead ends: 339 [2020-10-05 22:19:55,935 INFO L226 Difference]: Without dead ends: 335 [2020-10-05 22:19:55,936 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-10-05 22:19:55,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-10-05 22:19:55,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 264. [2020-10-05 22:19:55,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-05 22:19:55,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 677 transitions. [2020-10-05 22:19:55,940 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 677 transitions. Word has length 14 [2020-10-05 22:19:55,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:19:55,940 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 677 transitions. [2020-10-05 22:19:55,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:19:55,940 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 677 transitions. [2020-10-05 22:19:55,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:19:55,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:19:55,941 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:19:56,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:56,141 INFO L427 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:19:56,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:19:56,142 INFO L82 PathProgramCache]: Analyzing trace with hash -792218594, now seen corresponding path program 145 times [2020-10-05 22:19:56,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:19:56,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982392244] [2020-10-05 22:19:56,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:19:56,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:19:56,301 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:56,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982392244] [2020-10-05 22:19:56,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677706685] [2020-10-05 22:19:56,302 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:56,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:19:56,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:19:56,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:19:56,588 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:56,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:19:56,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:19:56,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233994666] [2020-10-05 22:19:56,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:19:56,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:19:56,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:19:56,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:19:56,590 INFO L87 Difference]: Start difference. First operand 264 states and 677 transitions. Second operand 17 states. [2020-10-05 22:19:56,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:19:56,738 INFO L93 Difference]: Finished difference Result 287 states and 713 transitions. [2020-10-05 22:19:56,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-05 22:19:56,739 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:19:56,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:19:56,739 INFO L225 Difference]: With dead ends: 287 [2020-10-05 22:19:56,740 INFO L226 Difference]: Without dead ends: 285 [2020-10-05 22:19:56,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-10-05 22:19:56,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-10-05 22:19:56,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 266. [2020-10-05 22:19:56,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-05 22:19:56,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 683 transitions. [2020-10-05 22:19:56,745 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 683 transitions. Word has length 14 [2020-10-05 22:19:56,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:19:56,745 INFO L479 AbstractCegarLoop]: Abstraction has 266 states and 683 transitions. [2020-10-05 22:19:56,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:19:56,745 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 683 transitions. [2020-10-05 22:19:56,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:19:56,746 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:19:56,746 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:19:56,958 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:56,959 INFO L427 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:19:56,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:19:56,959 INFO L82 PathProgramCache]: Analyzing trace with hash -792217633, now seen corresponding path program 146 times [2020-10-05 22:19:56,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:19:56,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588790129] [2020-10-05 22:19:56,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:19:56,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:19:57,099 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:57,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588790129] [2020-10-05 22:19:57,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003057674] [2020-10-05 22:19:57,099 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:57,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:19:57,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:19:57,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:19:57,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:19:57,319 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:57,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:19:57,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:19:57,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750307549] [2020-10-05 22:19:57,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:19:57,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:19:57,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:19:57,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:19:57,321 INFO L87 Difference]: Start difference. First operand 266 states and 683 transitions. Second operand 17 states. [2020-10-05 22:19:57,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:19:57,658 INFO L93 Difference]: Finished difference Result 317 states and 778 transitions. [2020-10-05 22:19:57,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-05 22:19:57,659 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:19:57,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:19:57,660 INFO L225 Difference]: With dead ends: 317 [2020-10-05 22:19:57,660 INFO L226 Difference]: Without dead ends: 314 [2020-10-05 22:19:57,660 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2020-10-05 22:19:57,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-10-05 22:19:57,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 264. [2020-10-05 22:19:57,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-05 22:19:57,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 677 transitions. [2020-10-05 22:19:57,664 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 677 transitions. Word has length 14 [2020-10-05 22:19:57,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:19:57,665 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 677 transitions. [2020-10-05 22:19:57,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:19:57,665 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 677 transitions. [2020-10-05 22:19:57,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:19:57,665 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:19:57,665 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:19:57,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:57,866 INFO L427 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:19:57,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:19:57,867 INFO L82 PathProgramCache]: Analyzing trace with hash -792188803, now seen corresponding path program 147 times [2020-10-05 22:19:57,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:19:57,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159211705] [2020-10-05 22:19:57,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:19:57,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:19:57,984 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:57,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159211705] [2020-10-05 22:19:57,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105091956] [2020-10-05 22:19:57,984 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:58,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-05 22:19:58,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:19:58,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-05 22:19:58,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:19:58,110 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:58,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:19:58,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2020-10-05 22:19:58,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159008907] [2020-10-05 22:19:58,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-05 22:19:58,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:19:58,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-05 22:19:58,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-05 22:19:58,112 INFO L87 Difference]: Start difference. First operand 264 states and 677 transitions. Second operand 14 states. [2020-10-05 22:19:58,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:19:58,428 INFO L93 Difference]: Finished difference Result 337 states and 817 transitions. [2020-10-05 22:19:58,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-05 22:19:58,429 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2020-10-05 22:19:58,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:19:58,430 INFO L225 Difference]: With dead ends: 337 [2020-10-05 22:19:58,430 INFO L226 Difference]: Without dead ends: 330 [2020-10-05 22:19:58,430 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2020-10-05 22:19:58,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-10-05 22:19:58,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 262. [2020-10-05 22:19:58,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-05 22:19:58,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 671 transitions. [2020-10-05 22:19:58,434 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 671 transitions. Word has length 14 [2020-10-05 22:19:58,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:19:58,434 INFO L479 AbstractCegarLoop]: Abstraction has 262 states and 671 transitions. [2020-10-05 22:19:58,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-05 22:19:58,435 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 671 transitions. [2020-10-05 22:19:58,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:19:58,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:19:58,435 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:19:58,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:58,636 INFO L427 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:19:58,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:19:58,636 INFO L82 PathProgramCache]: Analyzing trace with hash -771662804, now seen corresponding path program 148 times [2020-10-05 22:19:58,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:19:58,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426468001] [2020-10-05 22:19:58,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:19:58,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:19:58,772 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:58,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426468001] [2020-10-05 22:19:58,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51126696] [2020-10-05 22:19:58,773 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:58,815 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:19:58,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:19:58,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:19:58,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:19:59,000 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:59,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:19:59,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:19:59,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292713495] [2020-10-05 22:19:59,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:19:59,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:19:59,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:19:59,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:19:59,002 INFO L87 Difference]: Start difference. First operand 262 states and 671 transitions. Second operand 17 states. [2020-10-05 22:19:59,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:19:59,180 INFO L93 Difference]: Finished difference Result 278 states and 694 transitions. [2020-10-05 22:19:59,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-05 22:19:59,181 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:19:59,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:19:59,182 INFO L225 Difference]: With dead ends: 278 [2020-10-05 22:19:59,182 INFO L226 Difference]: Without dead ends: 276 [2020-10-05 22:19:59,183 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-05 22:19:59,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-10-05 22:19:59,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 262. [2020-10-05 22:19:59,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-05 22:19:59,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 671 transitions. [2020-10-05 22:19:59,187 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 671 transitions. Word has length 14 [2020-10-05 22:19:59,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:19:59,188 INFO L479 AbstractCegarLoop]: Abstraction has 262 states and 671 transitions. [2020-10-05 22:19:59,188 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:19:59,188 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 671 transitions. [2020-10-05 22:19:59,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:19:59,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:19:59,188 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:19:59,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:59,389 INFO L427 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:19:59,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:19:59,390 INFO L82 PathProgramCache]: Analyzing trace with hash -771661843, now seen corresponding path program 149 times [2020-10-05 22:19:59,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:19:59,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902907039] [2020-10-05 22:19:59,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:19:59,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:19:59,509 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:59,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902907039] [2020-10-05 22:19:59,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142251190] [2020-10-05 22:19:59,510 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:19:59,549 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-05 22:19:59,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:19:59,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:19:59,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:19:59,728 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:19:59,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:19:59,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:19:59,729 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584428204] [2020-10-05 22:19:59,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:19:59,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:19:59,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:19:59,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:19:59,730 INFO L87 Difference]: Start difference. First operand 262 states and 671 transitions. Second operand 17 states. [2020-10-05 22:20:00,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:20:00,089 INFO L93 Difference]: Finished difference Result 306 states and 753 transitions. [2020-10-05 22:20:00,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-05 22:20:00,089 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:20:00,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:20:00,090 INFO L225 Difference]: With dead ends: 306 [2020-10-05 22:20:00,090 INFO L226 Difference]: Without dead ends: 303 [2020-10-05 22:20:00,090 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=204, Invalid=446, Unknown=0, NotChecked=0, Total=650 [2020-10-05 22:20:00,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2020-10-05 22:20:00,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 260. [2020-10-05 22:20:00,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-10-05 22:20:00,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 665 transitions. [2020-10-05 22:20:00,095 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 665 transitions. Word has length 14 [2020-10-05 22:20:00,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:20:00,095 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 665 transitions. [2020-10-05 22:20:00,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:20:00,095 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 665 transitions. [2020-10-05 22:20:00,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:20:00,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:20:00,096 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:20:00,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2020-10-05 22:20:00,296 INFO L427 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:20:00,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:20:00,297 INFO L82 PathProgramCache]: Analyzing trace with hash -770999714, now seen corresponding path program 150 times [2020-10-05 22:20:00,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:20:00,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401416236] [2020-10-05 22:20:00,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:20:00,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:20:00,414 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:20:00,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401416236] [2020-10-05 22:20:00,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512644153] [2020-10-05 22:20:00,415 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:20:00,455 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-05 22:20:00,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:20:00,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-05 22:20:00,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:20:00,482 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:20:00,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:20:00,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-05 22:20:00,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095977908] [2020-10-05 22:20:00,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 22:20:00,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:20:00,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 22:20:00,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-10-05 22:20:00,484 INFO L87 Difference]: Start difference. First operand 260 states and 665 transitions. Second operand 11 states. [2020-10-05 22:20:00,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:20:00,664 INFO L93 Difference]: Finished difference Result 269 states and 677 transitions. [2020-10-05 22:20:00,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-05 22:20:00,665 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-05 22:20:00,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:20:00,666 INFO L225 Difference]: With dead ends: 269 [2020-10-05 22:20:00,666 INFO L226 Difference]: Without dead ends: 267 [2020-10-05 22:20:00,666 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2020-10-05 22:20:00,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-10-05 22:20:00,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 256. [2020-10-05 22:20:00,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-10-05 22:20:00,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 659 transitions. [2020-10-05 22:20:00,672 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 659 transitions. Word has length 14 [2020-10-05 22:20:00,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:20:00,672 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 659 transitions. [2020-10-05 22:20:00,673 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 22:20:00,673 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 659 transitions. [2020-10-05 22:20:00,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:20:00,673 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:20:00,673 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:20:00,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:20:00,885 INFO L427 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:20:00,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:20:00,886 INFO L82 PathProgramCache]: Analyzing trace with hash -770977394, now seen corresponding path program 151 times [2020-10-05 22:20:00,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:20:00,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206032184] [2020-10-05 22:20:00,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:20:00,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:20:00,990 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:20:00,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206032184] [2020-10-05 22:20:00,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27176343] [2020-10-05 22:20:00,991 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:20:01,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:20:01,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:20:01,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:20:01,193 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:20:01,234 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:20:01,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:20:01,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:20:01,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852861169] [2020-10-05 22:20:01,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:20:01,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:20:01,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:20:01,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:20:01,236 INFO L87 Difference]: Start difference. First operand 256 states and 659 transitions. Second operand 17 states. [2020-10-05 22:20:01,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:20:01,736 INFO L93 Difference]: Finished difference Result 298 states and 754 transitions. [2020-10-05 22:20:01,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-05 22:20:01,737 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:20:01,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:20:01,738 INFO L225 Difference]: With dead ends: 298 [2020-10-05 22:20:01,738 INFO L226 Difference]: Without dead ends: 294 [2020-10-05 22:20:01,738 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-10-05 22:20:01,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-10-05 22:20:01,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 257. [2020-10-05 22:20:01,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-10-05 22:20:01,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 662 transitions. [2020-10-05 22:20:01,742 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 662 transitions. Word has length 14 [2020-10-05 22:20:01,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:20:01,742 INFO L479 AbstractCegarLoop]: Abstraction has 257 states and 662 transitions. [2020-10-05 22:20:01,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:20:01,743 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 662 transitions. [2020-10-05 22:20:01,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:20:01,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:20:01,743 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:20:01,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-10-05 22:20:01,944 INFO L427 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:20:01,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:20:01,944 INFO L82 PathProgramCache]: Analyzing trace with hash -770969923, now seen corresponding path program 152 times [2020-10-05 22:20:01,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:20:01,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966187777] [2020-10-05 22:20:01,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:20:01,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:20:02,047 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:20:02,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966187777] [2020-10-05 22:20:02,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401860342] [2020-10-05 22:20:02,048 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:20:02,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:20:02,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:20:02,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:20:02,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:20:02,298 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:20:02,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:20:02,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:20:02,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116077304] [2020-10-05 22:20:02,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:20:02,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:20:02,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:20:02,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:20:02,300 INFO L87 Difference]: Start difference. First operand 257 states and 662 transitions. Second operand 17 states. [2020-10-05 22:20:02,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:20:02,734 INFO L93 Difference]: Finished difference Result 313 states and 786 transitions. [2020-10-05 22:20:02,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 22:20:02,735 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:20:02,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:20:02,736 INFO L225 Difference]: With dead ends: 313 [2020-10-05 22:20:02,736 INFO L226 Difference]: Without dead ends: 310 [2020-10-05 22:20:02,736 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=217, Invalid=485, Unknown=0, NotChecked=0, Total=702 [2020-10-05 22:20:02,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-10-05 22:20:02,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 259. [2020-10-05 22:20:02,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-05 22:20:02,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 669 transitions. [2020-10-05 22:20:02,746 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 669 transitions. Word has length 14 [2020-10-05 22:20:02,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:20:02,746 INFO L479 AbstractCegarLoop]: Abstraction has 259 states and 669 transitions. [2020-10-05 22:20:02,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:20:02,747 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 669 transitions. [2020-10-05 22:20:02,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:20:02,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:20:02,747 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:20:02,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:20:02,948 INFO L427 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:20:02,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:20:02,948 INFO L82 PathProgramCache]: Analyzing trace with hash -770948564, now seen corresponding path program 153 times [2020-10-05 22:20:02,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:20:02,949 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745244649] [2020-10-05 22:20:02,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:20:02,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:20:03,052 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:20:03,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745244649] [2020-10-05 22:20:03,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430739251] [2020-10-05 22:20:03,053 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:20:03,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-05 22:20:03,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:20:03,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-05 22:20:03,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:20:03,255 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:20:03,294 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:20:03,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:20:03,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:20:03,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169350269] [2020-10-05 22:20:03,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:20:03,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:20:03,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:20:03,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:20:03,296 INFO L87 Difference]: Start difference. First operand 259 states and 669 transitions. Second operand 17 states. [2020-10-05 22:20:03,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:20:03,926 INFO L93 Difference]: Finished difference Result 314 states and 795 transitions. [2020-10-05 22:20:03,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-05 22:20:03,927 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:20:03,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:20:03,928 INFO L225 Difference]: With dead ends: 314 [2020-10-05 22:20:03,928 INFO L226 Difference]: Without dead ends: 309 [2020-10-05 22:20:03,928 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=273, Invalid=597, Unknown=0, NotChecked=0, Total=870 [2020-10-05 22:20:03,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-10-05 22:20:03,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 259. [2020-10-05 22:20:03,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-05 22:20:03,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 668 transitions. [2020-10-05 22:20:03,932 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 668 transitions. Word has length 14 [2020-10-05 22:20:03,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:20:03,932 INFO L479 AbstractCegarLoop]: Abstraction has 259 states and 668 transitions. [2020-10-05 22:20:03,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:20:03,933 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 668 transitions. [2020-10-05 22:20:03,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:20:03,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:20:03,933 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:20:04,136 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:20:04,137 INFO L427 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:20:04,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:20:04,137 INFO L82 PathProgramCache]: Analyzing trace with hash -770947603, now seen corresponding path program 154 times [2020-10-05 22:20:04,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:20:04,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533134651] [2020-10-05 22:20:04,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:20:04,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:20:04,239 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:20:04,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533134651] [2020-10-05 22:20:04,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731341796] [2020-10-05 22:20:04,240 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:20:04,280 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:20:04,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:20:04,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:20:04,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:20:04,446 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:20:04,485 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:20:04,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:20:04,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:20:04,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760732199] [2020-10-05 22:20:04,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:20:04,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:20:04,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:20:04,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:20:04,488 INFO L87 Difference]: Start difference. First operand 259 states and 668 transitions. Second operand 17 states. [2020-10-05 22:20:05,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:20:05,121 INFO L93 Difference]: Finished difference Result 333 states and 837 transitions. [2020-10-05 22:20:05,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-05 22:20:05,122 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:20:05,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:20:05,123 INFO L225 Difference]: With dead ends: 333 [2020-10-05 22:20:05,123 INFO L226 Difference]: Without dead ends: 328 [2020-10-05 22:20:05,124 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-10-05 22:20:05,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-10-05 22:20:05,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 259. [2020-10-05 22:20:05,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-05 22:20:05,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 671 transitions. [2020-10-05 22:20:05,128 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 671 transitions. Word has length 14 [2020-10-05 22:20:05,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:20:05,128 INFO L479 AbstractCegarLoop]: Abstraction has 259 states and 671 transitions. [2020-10-05 22:20:05,128 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:20:05,128 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 671 transitions. [2020-10-05 22:20:05,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:20:05,128 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:20:05,129 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:20:05,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2020-10-05 22:20:05,339 INFO L427 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:20:05,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:20:05,339 INFO L82 PathProgramCache]: Analyzing trace with hash -770739283, now seen corresponding path program 155 times [2020-10-05 22:20:05,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:20:05,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534747146] [2020-10-05 22:20:05,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:20:05,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:20:05,442 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:20:05,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534747146] [2020-10-05 22:20:05,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132102651] [2020-10-05 22:20:05,443 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:20:05,482 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-05 22:20:05,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:20:05,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:20:05,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:20:05,737 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:20:05,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:20:05,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:20:05,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79612682] [2020-10-05 22:20:05,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:20:05,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:20:05,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:20:05,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:20:05,738 INFO L87 Difference]: Start difference. First operand 259 states and 671 transitions. Second operand 17 states. [2020-10-05 22:20:06,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:20:06,202 INFO L93 Difference]: Finished difference Result 350 states and 873 transitions. [2020-10-05 22:20:06,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-05 22:20:06,203 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:20:06,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:20:06,204 INFO L225 Difference]: With dead ends: 350 [2020-10-05 22:20:06,204 INFO L226 Difference]: Without dead ends: 346 [2020-10-05 22:20:06,204 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=201, Invalid=501, Unknown=0, NotChecked=0, Total=702 [2020-10-05 22:20:06,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-10-05 22:20:06,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 261. [2020-10-05 22:20:06,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-10-05 22:20:06,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 678 transitions. [2020-10-05 22:20:06,208 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 678 transitions. Word has length 14 [2020-10-05 22:20:06,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:20:06,208 INFO L479 AbstractCegarLoop]: Abstraction has 261 states and 678 transitions. [2020-10-05 22:20:06,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:20:06,209 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 678 transitions. [2020-10-05 22:20:06,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:20:06,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:20:06,209 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:20:06,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:20:06,410 INFO L427 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:20:06,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:20:06,411 INFO L82 PathProgramCache]: Analyzing trace with hash -770076193, now seen corresponding path program 156 times [2020-10-05 22:20:06,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:20:06,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494532423] [2020-10-05 22:20:06,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:20:06,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:20:06,517 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:20:06,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494532423] [2020-10-05 22:20:06,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152658950] [2020-10-05 22:20:06,518 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:20:06,556 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-05 22:20:06,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:20:06,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:20:06,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:20:07,476 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:20:07,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:20:07,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:20:07,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318127645] [2020-10-05 22:20:07,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:20:07,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:20:07,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:20:07,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:20:07,477 INFO L87 Difference]: Start difference. First operand 261 states and 678 transitions. Second operand 17 states. [2020-10-05 22:20:08,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:20:08,097 INFO L93 Difference]: Finished difference Result 362 states and 911 transitions. [2020-10-05 22:20:08,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-05 22:20:08,099 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:20:08,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:20:08,099 INFO L225 Difference]: With dead ends: 362 [2020-10-05 22:20:08,100 INFO L226 Difference]: Without dead ends: 358 [2020-10-05 22:20:08,100 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=272, Invalid=598, Unknown=0, NotChecked=0, Total=870 [2020-10-05 22:20:08,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-10-05 22:20:08,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 265. [2020-10-05 22:20:08,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-10-05 22:20:08,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 692 transitions. [2020-10-05 22:20:08,104 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 692 transitions. Word has length 14 [2020-10-05 22:20:08,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:20:08,105 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 692 transitions. [2020-10-05 22:20:08,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:20:08,105 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 692 transitions. [2020-10-05 22:20:08,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:20:08,105 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:20:08,105 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:20:08,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:20:08,306 INFO L427 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:20:08,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:20:08,307 INFO L82 PathProgramCache]: Analyzing trace with hash -770054834, now seen corresponding path program 157 times [2020-10-05 22:20:08,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:20:08,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946757427] [2020-10-05 22:20:08,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:20:08,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:20:08,426 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:20:08,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946757427] [2020-10-05 22:20:08,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119736610] [2020-10-05 22:20:08,427 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:20:08,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:20:08,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:20:08,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:20:08,729 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:20:08,791 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:20:08,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:20:08,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:20:08,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361447909] [2020-10-05 22:20:08,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:20:08,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:20:08,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:20:08,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:20:08,792 INFO L87 Difference]: Start difference. First operand 265 states and 692 transitions. Second operand 17 states. [2020-10-05 22:20:09,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:20:09,612 INFO L93 Difference]: Finished difference Result 322 states and 822 transitions. [2020-10-05 22:20:09,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-05 22:20:09,613 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:20:09,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:20:09,614 INFO L225 Difference]: With dead ends: 322 [2020-10-05 22:20:09,614 INFO L226 Difference]: Without dead ends: 316 [2020-10-05 22:20:09,615 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=358, Invalid=698, Unknown=0, NotChecked=0, Total=1056 [2020-10-05 22:20:09,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-10-05 22:20:09,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 265. [2020-10-05 22:20:09,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-10-05 22:20:09,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 690 transitions. [2020-10-05 22:20:09,618 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 690 transitions. Word has length 14 [2020-10-05 22:20:09,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:20:09,619 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 690 transitions. [2020-10-05 22:20:09,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:20:09,619 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 690 transitions. [2020-10-05 22:20:09,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:20:09,619 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:20:09,619 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:20:09,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:20:09,820 INFO L427 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:20:09,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:20:09,821 INFO L82 PathProgramCache]: Analyzing trace with hash -770053873, now seen corresponding path program 158 times [2020-10-05 22:20:09,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:20:09,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327023472] [2020-10-05 22:20:09,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:20:09,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:20:09,934 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:20:09,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327023472] [2020-10-05 22:20:09,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454452642] [2020-10-05 22:20:09,935 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:20:09,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:20:09,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:20:09,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:20:09,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:20:12,227 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:20:12,273 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:20:12,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:20:12,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:20:12,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092831422] [2020-10-05 22:20:12,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:20:12,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:20:12,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:20:12,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=185, Unknown=1, NotChecked=0, Total=272 [2020-10-05 22:20:12,275 INFO L87 Difference]: Start difference. First operand 265 states and 690 transitions. Second operand 17 states. [2020-10-05 22:20:16,543 WARN L193 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2020-10-05 22:20:18,884 WARN L193 SmtUtils]: Spent 2.25 s on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-10-05 22:20:23,024 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2020-10-05 22:20:23,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:20:23,659 INFO L93 Difference]: Finished difference Result 395 states and 997 transitions. [2020-10-05 22:20:23,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-05 22:20:23,661 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:20:23,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:20:23,662 INFO L225 Difference]: With dead ends: 395 [2020-10-05 22:20:23,662 INFO L226 Difference]: Without dead ends: 386 [2020-10-05 22:20:23,662 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=370, Invalid=819, Unknown=1, NotChecked=0, Total=1190 [2020-10-05 22:20:23,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2020-10-05 22:20:23,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 262. [2020-10-05 22:20:23,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-05 22:20:23,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 685 transitions. [2020-10-05 22:20:23,666 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 685 transitions. Word has length 14 [2020-10-05 22:20:23,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:20:23,666 INFO L479 AbstractCegarLoop]: Abstraction has 262 states and 685 transitions. [2020-10-05 22:20:23,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:20:23,666 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 685 transitions. [2020-10-05 22:20:23,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:20:23,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:20:23,667 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:20:23,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:20:23,868 INFO L427 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:20:23,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:20:23,868 INFO L82 PathProgramCache]: Analyzing trace with hash -770025043, now seen corresponding path program 159 times [2020-10-05 22:20:23,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:20:23,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446337367] [2020-10-05 22:20:23,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:20:23,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:20:23,973 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:20:23,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446337367] [2020-10-05 22:20:23,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781269294] [2020-10-05 22:20:23,974 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:20:24,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-05 22:20:24,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:20:24,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:20:24,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:20:24,224 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:20:24,256 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:20:24,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:20:24,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:20:24,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656454563] [2020-10-05 22:20:24,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:20:24,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:20:24,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:20:24,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:20:24,258 INFO L87 Difference]: Start difference. First operand 262 states and 685 transitions. Second operand 17 states. [2020-10-05 22:20:25,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:20:25,064 INFO L93 Difference]: Finished difference Result 358 states and 909 transitions. [2020-10-05 22:20:25,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-05 22:20:25,065 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:20:25,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:20:25,066 INFO L225 Difference]: With dead ends: 358 [2020-10-05 22:20:25,066 INFO L226 Difference]: Without dead ends: 353 [2020-10-05 22:20:25,067 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=338, Invalid=718, Unknown=0, NotChecked=0, Total=1056 [2020-10-05 22:20:25,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2020-10-05 22:20:25,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 262. [2020-10-05 22:20:25,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-05 22:20:25,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 685 transitions. [2020-10-05 22:20:25,071 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 685 transitions. Word has length 14 [2020-10-05 22:20:25,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:20:25,071 INFO L479 AbstractCegarLoop]: Abstraction has 262 states and 685 transitions. [2020-10-05 22:20:25,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:20:25,071 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 685 transitions. [2020-10-05 22:20:25,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:20:25,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:20:25,072 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:20:25,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:20:25,273 INFO L427 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:20:25,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:20:25,273 INFO L82 PathProgramCache]: Analyzing trace with hash -763589443, now seen corresponding path program 160 times [2020-10-05 22:20:25,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:20:25,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722640682] [2020-10-05 22:20:25,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:20:25,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:20:25,378 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:20:25,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722640682] [2020-10-05 22:20:25,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092118781] [2020-10-05 22:20:25,379 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:20:25,418 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:20:25,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:20:25,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:20:25,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:20:25,676 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:20:25,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:20:25,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:20:25,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906723713] [2020-10-05 22:20:25,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:20:25,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:20:25,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:20:25,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:20:25,678 INFO L87 Difference]: Start difference. First operand 262 states and 685 transitions. Second operand 17 states. [2020-10-05 22:20:26,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:20:26,148 INFO L93 Difference]: Finished difference Result 350 states and 871 transitions. [2020-10-05 22:20:26,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-05 22:20:26,150 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:20:26,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:20:26,151 INFO L225 Difference]: With dead ends: 350 [2020-10-05 22:20:26,151 INFO L226 Difference]: Without dead ends: 347 [2020-10-05 22:20:26,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=193, Invalid=509, Unknown=0, NotChecked=0, Total=702 [2020-10-05 22:20:26,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-10-05 22:20:26,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 265. [2020-10-05 22:20:26,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-10-05 22:20:26,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 696 transitions. [2020-10-05 22:20:26,155 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 696 transitions. Word has length 14 [2020-10-05 22:20:26,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:20:26,156 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 696 transitions. [2020-10-05 22:20:26,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:20:26,156 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 696 transitions. [2020-10-05 22:20:26,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:20:26,156 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:20:26,156 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:20:26,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:20:26,357 INFO L427 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:20:26,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:20:26,358 INFO L82 PathProgramCache]: Analyzing trace with hash -763588482, now seen corresponding path program 161 times [2020-10-05 22:20:26,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:20:26,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721960405] [2020-10-05 22:20:26,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:20:26,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:20:26,462 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:20:26,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721960405] [2020-10-05 22:20:26,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701484070] [2020-10-05 22:20:26,462 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:20:26,502 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:20:26,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:20:26,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:20:26,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:20:31,212 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:20:31,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:20:31,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:20:31,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820166708] [2020-10-05 22:20:31,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:20:31,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:20:31,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:20:31,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=212, Unknown=1, NotChecked=0, Total=272 [2020-10-05 22:20:31,213 INFO L87 Difference]: Start difference. First operand 265 states and 696 transitions. Second operand 17 states. [2020-10-05 22:20:35,536 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-05 22:20:41,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:20:41,955 INFO L93 Difference]: Finished difference Result 380 states and 945 transitions. [2020-10-05 22:20:41,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-05 22:20:41,956 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:20:41,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:20:41,957 INFO L225 Difference]: With dead ends: 380 [2020-10-05 22:20:41,957 INFO L226 Difference]: Without dead ends: 375 [2020-10-05 22:20:41,958 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=193, Invalid=508, Unknown=1, NotChecked=0, Total=702 [2020-10-05 22:20:41,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2020-10-05 22:20:41,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 266. [2020-10-05 22:20:41,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-05 22:20:41,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 698 transitions. [2020-10-05 22:20:41,963 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 698 transitions. Word has length 14 [2020-10-05 22:20:41,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:20:41,963 INFO L479 AbstractCegarLoop]: Abstraction has 266 states and 698 transitions. [2020-10-05 22:20:41,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:20:41,963 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 698 transitions. [2020-10-05 22:20:41,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:20:41,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:20:41,964 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:20:42,164 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-10-05 22:20:42,164 INFO L427 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:20:42,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:20:42,165 INFO L82 PathProgramCache]: Analyzing trace with hash -763559652, now seen corresponding path program 162 times [2020-10-05 22:20:42,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:20:42,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185223804] [2020-10-05 22:20:42,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:20:42,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:20:42,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:20:42,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185223804] [2020-10-05 22:20:42,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423537117] [2020-10-05 22:20:42,286 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:20:42,326 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-05 22:20:42,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:20:42,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:20:42,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:20:42,621 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:20:42,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:20:42,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:20:42,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369729543] [2020-10-05 22:20:42,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:20:42,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:20:42,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:20:42,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:20:42,623 INFO L87 Difference]: Start difference. First operand 266 states and 698 transitions. Second operand 17 states. [2020-10-05 22:20:43,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:20:43,215 INFO L93 Difference]: Finished difference Result 366 states and 912 transitions. [2020-10-05 22:20:43,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-05 22:20:43,217 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:20:43,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:20:43,218 INFO L225 Difference]: With dead ends: 366 [2020-10-05 22:20:43,218 INFO L226 Difference]: Without dead ends: 362 [2020-10-05 22:20:43,218 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=192, Invalid=510, Unknown=0, NotChecked=0, Total=702 [2020-10-05 22:20:43,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-10-05 22:20:43,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 264. [2020-10-05 22:20:43,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-05 22:20:43,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 692 transitions. [2020-10-05 22:20:43,223 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 692 transitions. Word has length 14 [2020-10-05 22:20:43,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:20:43,223 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 692 transitions. [2020-10-05 22:20:43,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:20:43,224 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 692 transitions. [2020-10-05 22:20:43,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:20:43,224 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:20:43,224 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:20:43,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2020-10-05 22:20:43,428 INFO L427 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:20:43,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:20:43,428 INFO L82 PathProgramCache]: Analyzing trace with hash -743033653, now seen corresponding path program 163 times [2020-10-05 22:20:43,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:20:43,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135945703] [2020-10-05 22:20:43,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:20:43,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:20:43,548 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:20:43,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135945703] [2020-10-05 22:20:43,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398567229] [2020-10-05 22:20:43,549 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:20:43,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:20:43,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:20:43,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:20:46,065 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:20:46,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:20:46,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:20:46,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838223412] [2020-10-05 22:20:46,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:20:46,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:20:46,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:20:46,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:20:46,066 INFO L87 Difference]: Start difference. First operand 264 states and 692 transitions. Second operand 17 states. [2020-10-05 22:20:46,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:20:46,894 INFO L93 Difference]: Finished difference Result 357 states and 890 transitions. [2020-10-05 22:20:46,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-05 22:20:46,895 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:20:46,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:20:46,896 INFO L225 Difference]: With dead ends: 357 [2020-10-05 22:20:46,896 INFO L226 Difference]: Without dead ends: 354 [2020-10-05 22:20:46,896 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=290, Invalid=702, Unknown=0, NotChecked=0, Total=992 [2020-10-05 22:20:46,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2020-10-05 22:20:46,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 266. [2020-10-05 22:20:46,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-05 22:20:46,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 700 transitions. [2020-10-05 22:20:46,901 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 700 transitions. Word has length 14 [2020-10-05 22:20:46,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:20:46,901 INFO L479 AbstractCegarLoop]: Abstraction has 266 states and 700 transitions. [2020-10-05 22:20:46,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:20:46,901 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 700 transitions. [2020-10-05 22:20:46,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:20:46,902 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:20:46,902 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:20:47,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191 [2020-10-05 22:20:47,105 INFO L427 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:20:47,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:20:47,106 INFO L82 PathProgramCache]: Analyzing trace with hash -743032692, now seen corresponding path program 164 times [2020-10-05 22:20:47,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:20:47,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453881061] [2020-10-05 22:20:47,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:20:47,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:20:47,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:20:47,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453881061] [2020-10-05 22:20:47,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369152787] [2020-10-05 22:20:47,217 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:20:47,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:20:47,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:20:47,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:20:47,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:20:49,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:20:49,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:20:49,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:20:49,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980619248] [2020-10-05 22:20:49,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:20:49,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:20:49,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:20:49,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:20:49,046 INFO L87 Difference]: Start difference. First operand 266 states and 700 transitions. Second operand 17 states. [2020-10-05 22:20:53,458 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-05 22:21:08,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:08,189 INFO L93 Difference]: Finished difference Result 401 states and 995 transitions. [2020-10-05 22:21:08,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-05 22:21:08,190 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:21:08,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:08,191 INFO L225 Difference]: With dead ends: 401 [2020-10-05 22:21:08,191 INFO L226 Difference]: Without dead ends: 396 [2020-10-05 22:21:08,191 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=289, Invalid=699, Unknown=4, NotChecked=0, Total=992 [2020-10-05 22:21:08,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2020-10-05 22:21:08,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 269. [2020-10-05 22:21:08,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-10-05 22:21:08,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 709 transitions. [2020-10-05 22:21:08,196 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 709 transitions. Word has length 14 [2020-10-05 22:21:08,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:08,196 INFO L479 AbstractCegarLoop]: Abstraction has 269 states and 709 transitions. [2020-10-05 22:21:08,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:21:08,196 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 709 transitions. [2020-10-05 22:21:08,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:21:08,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:08,196 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:08,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:08,397 INFO L427 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:08,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:08,398 INFO L82 PathProgramCache]: Analyzing trace with hash -742370563, now seen corresponding path program 165 times [2020-10-05 22:21:08,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:08,398 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774033415] [2020-10-05 22:21:08,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:08,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:08,513 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:08,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774033415] [2020-10-05 22:21:08,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637107172] [2020-10-05 22:21:08,513 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:08,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-05 22:21:08,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:21:08,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:21:08,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:08,796 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:08,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:08,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:21:08,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872136875] [2020-10-05 22:21:08,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:21:08,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:08,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:21:08,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:21:08,798 INFO L87 Difference]: Start difference. First operand 269 states and 709 transitions. Second operand 17 states. [2020-10-05 22:21:09,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:09,630 INFO L93 Difference]: Finished difference Result 352 states and 890 transitions. [2020-10-05 22:21:09,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-05 22:21:09,631 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:21:09,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:09,632 INFO L225 Difference]: With dead ends: 352 [2020-10-05 22:21:09,632 INFO L226 Difference]: Without dead ends: 349 [2020-10-05 22:21:09,632 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2020-10-05 22:21:09,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-10-05 22:21:09,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 271. [2020-10-05 22:21:09,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-05 22:21:09,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 716 transitions. [2020-10-05 22:21:09,636 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 716 transitions. Word has length 14 [2020-10-05 22:21:09,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:09,637 INFO L479 AbstractCegarLoop]: Abstraction has 271 states and 716 transitions. [2020-10-05 22:21:09,637 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:21:09,637 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 716 transitions. [2020-10-05 22:21:09,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:21:09,637 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:09,637 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:09,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:09,838 INFO L427 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:09,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:09,839 INFO L82 PathProgramCache]: Analyzing trace with hash -742349204, now seen corresponding path program 166 times [2020-10-05 22:21:09,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:09,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274222267] [2020-10-05 22:21:09,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:09,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:09,960 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:09,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274222267] [2020-10-05 22:21:09,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524775200] [2020-10-05 22:21:09,960 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:10,001 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:21:10,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:21:10,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:21:10,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:10,234 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:21:10,284 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:10,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:10,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:21:10,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822499851] [2020-10-05 22:21:10,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:21:10,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:10,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:21:10,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:21:10,286 INFO L87 Difference]: Start difference. First operand 271 states and 716 transitions. Second operand 17 states. [2020-10-05 22:21:11,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:11,230 INFO L93 Difference]: Finished difference Result 323 states and 827 transitions. [2020-10-05 22:21:11,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-05 22:21:11,232 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:21:11,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:11,232 INFO L225 Difference]: With dead ends: 323 [2020-10-05 22:21:11,233 INFO L226 Difference]: Without dead ends: 316 [2020-10-05 22:21:11,233 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=394, Invalid=796, Unknown=0, NotChecked=0, Total=1190 [2020-10-05 22:21:11,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-10-05 22:21:11,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 271. [2020-10-05 22:21:11,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-05 22:21:11,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 713 transitions. [2020-10-05 22:21:11,237 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 713 transitions. Word has length 14 [2020-10-05 22:21:11,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:11,237 INFO L479 AbstractCegarLoop]: Abstraction has 271 states and 713 transitions. [2020-10-05 22:21:11,238 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:21:11,238 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 713 transitions. [2020-10-05 22:21:11,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:21:11,238 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:11,238 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:11,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2020-10-05 22:21:11,439 INFO L427 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:11,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:11,440 INFO L82 PathProgramCache]: Analyzing trace with hash -742348243, now seen corresponding path program 167 times [2020-10-05 22:21:11,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:11,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933745295] [2020-10-05 22:21:11,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:11,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:11,564 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:11,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933745295] [2020-10-05 22:21:11,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026255845] [2020-10-05 22:21:11,564 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:11,613 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-05 22:21:11,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:21:11,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:21:11,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:11,824 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:21:11,826 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:21:11,827 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:21:11,828 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:21:11,829 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:21:11,830 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:21:11,832 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:21:11,833 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:21:11,892 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:11,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:11,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:21:11,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012602708] [2020-10-05 22:21:11,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:21:11,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:11,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:21:11,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:21:11,894 INFO L87 Difference]: Start difference. First operand 271 states and 713 transitions. Second operand 17 states. [2020-10-05 22:21:13,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:13,064 INFO L93 Difference]: Finished difference Result 384 states and 973 transitions. [2020-10-05 22:21:13,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-05 22:21:13,065 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:21:13,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:13,066 INFO L225 Difference]: With dead ends: 384 [2020-10-05 22:21:13,066 INFO L226 Difference]: Without dead ends: 379 [2020-10-05 22:21:13,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=411, Invalid=921, Unknown=0, NotChecked=0, Total=1332 [2020-10-05 22:21:13,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2020-10-05 22:21:13,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 269. [2020-10-05 22:21:13,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-10-05 22:21:13,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 707 transitions. [2020-10-05 22:21:13,071 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 707 transitions. Word has length 14 [2020-10-05 22:21:13,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:13,071 INFO L479 AbstractCegarLoop]: Abstraction has 269 states and 707 transitions. [2020-10-05 22:21:13,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:21:13,071 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 707 transitions. [2020-10-05 22:21:13,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:21:13,071 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:13,071 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:13,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:13,272 INFO L427 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:13,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:13,273 INFO L82 PathProgramCache]: Analyzing trace with hash -742340772, now seen corresponding path program 168 times [2020-10-05 22:21:13,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:13,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450482670] [2020-10-05 22:21:13,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:13,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:13,390 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:13,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450482670] [2020-10-05 22:21:13,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963898386] [2020-10-05 22:21:13,391 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:13,430 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-05 22:21:13,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:21:13,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:21:13,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:16,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:16,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:16,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:21:16,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342676707] [2020-10-05 22:21:16,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:21:16,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:16,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:21:16,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=196, Unknown=1, NotChecked=0, Total=272 [2020-10-05 22:21:16,627 INFO L87 Difference]: Start difference. First operand 269 states and 707 transitions. Second operand 17 states. [2020-10-05 22:21:20,998 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-05 22:21:25,274 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-05 22:21:25,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:25,908 INFO L93 Difference]: Finished difference Result 403 states and 1011 transitions. [2020-10-05 22:21:25,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-05 22:21:25,910 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-05 22:21:25,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:25,911 INFO L225 Difference]: With dead ends: 403 [2020-10-05 22:21:25,911 INFO L226 Difference]: Without dead ends: 398 [2020-10-05 22:21:25,911 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=348, Invalid=841, Unknown=1, NotChecked=0, Total=1190 [2020-10-05 22:21:25,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2020-10-05 22:21:25,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 273. [2020-10-05 22:21:25,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-10-05 22:21:25,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 721 transitions. [2020-10-05 22:21:25,915 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 721 transitions. Word has length 14 [2020-10-05 22:21:25,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:25,915 INFO L479 AbstractCegarLoop]: Abstraction has 273 states and 721 transitions. [2020-10-05 22:21:25,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 22:21:25,916 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 721 transitions. [2020-10-05 22:21:25,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:21:25,916 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:25,916 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:26,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable196 [2020-10-05 22:21:26,117 INFO L427 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:26,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:26,118 INFO L82 PathProgramCache]: Analyzing trace with hash -742319413, now seen corresponding path program 169 times [2020-10-05 22:21:26,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:26,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527223622] [2020-10-05 22:21:26,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:26,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:26,251 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:26,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527223622] [2020-10-05 22:21:26,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883877836] [2020-10-05 22:21:26,252 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:26,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:26,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:21:26,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:29,483 WARN L860 $PredicateComparison]: unable to prove that (exists ((aux_div_aux_mod_v_~j~0_491_43_92 Int) (v_~i~0_529 Int) (aux_div_v_~j~0_491_43 Int)) (let ((.cse1 (* 2 aux_div_aux_mod_v_~j~0_491_43_92)) (.cse0 (* 2 aux_div_v_~j~0_491_43))) (and (<= aux_div_v_~j~0_491_43 1) (<= (+ c_~j~0 .cse0) (* 2 v_~i~0_529)) (<= (+ .cse1 .cse0 1) v_~i~0_529) (<= c_~i~0 (+ v_~i~0_529 c_~j~0)) (<= aux_div_aux_mod_v_~j~0_491_43_92 1) (<= c_~j~0 (+ .cse1 v_~i~0_529 2)) (<= v_~i~0_529 (+ .cse1 .cse0 3))))) is different from true [2020-10-05 22:21:29,487 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:21:29,490 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:21:29,550 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:29,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:29,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 22:21:29,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495417175] [2020-10-05 22:21:29,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 22:21:29,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:29,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 22:21:29,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=162, Unknown=2, NotChecked=28, Total=272 [2020-10-05 22:21:29,551 INFO L87 Difference]: Start difference. First operand 273 states and 721 transitions. Second operand 17 states. [2020-10-05 22:21:29,906 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2020-10-05 22:21:34,045 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-05 22:21:38,219 WARN L193 SmtUtils]: Spent 1.81 s on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2020-10-05 22:21:42,359 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 Received shutdown request... [2020-10-05 22:21:43,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-05 22:21:43,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:43,738 WARN L544 AbstractCegarLoop]: Verification canceled [2020-10-05 22:21:43,743 WARN L228 ceAbstractionStarter]: Timeout [2020-10-05 22:21:43,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.10 10:21:43 BasicIcfg [2020-10-05 22:21:43,744 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-05 22:21:43,745 INFO L168 Benchmark]: Toolchain (without parser) took 273362.20 ms. Allocated memory was 141.0 MB in the beginning and 185.6 MB in the end (delta: 44.6 MB). Free memory was 103.3 MB in the beginning and 107.4 MB in the end (delta: -4.1 MB). Peak memory consumption was 40.5 MB. Max. memory is 7.1 GB. [2020-10-05 22:21:43,746 INFO L168 Benchmark]: CDTParser took 0.57 ms. Allocated memory is still 141.0 MB. Free memory was 122.5 MB in the beginning and 122.1 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. [2020-10-05 22:21:43,746 INFO L168 Benchmark]: CACSL2BoogieTranslator took 732.28 ms. Allocated memory was 141.0 MB in the beginning and 203.4 MB in the end (delta: 62.4 MB). Free memory was 103.3 MB in the beginning and 163.1 MB in the end (delta: -59.8 MB). Peak memory consumption was 25.7 MB. Max. memory is 7.1 GB. [2020-10-05 22:21:43,747 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.20 ms. Allocated memory is still 203.4 MB. Free memory was 163.1 MB in the beginning and 161.2 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2020-10-05 22:21:43,747 INFO L168 Benchmark]: Boogie Preprocessor took 33.59 ms. Allocated memory is still 203.4 MB. Free memory was 161.2 MB in the beginning and 160.3 MB in the end (delta: 939.8 kB). Peak memory consumption was 939.8 kB. Max. memory is 7.1 GB. [2020-10-05 22:21:43,747 INFO L168 Benchmark]: RCFGBuilder took 360.36 ms. Allocated memory is still 203.4 MB. Free memory was 159.3 MB in the beginning and 139.1 MB in the end (delta: 20.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 7.1 GB. [2020-10-05 22:21:43,748 INFO L168 Benchmark]: TraceAbstraction took 272185.66 ms. Allocated memory was 203.4 MB in the beginning and 185.6 MB in the end (delta: -17.8 MB). Free memory was 139.1 MB in the beginning and 107.4 MB in the end (delta: 31.7 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-10-05 22:21:43,750 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.57 ms. Allocated memory is still 141.0 MB. Free memory was 122.5 MB in the beginning and 122.1 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 732.28 ms. Allocated memory was 141.0 MB in the beginning and 203.4 MB in the end (delta: 62.4 MB). Free memory was 103.3 MB in the beginning and 163.1 MB in the end (delta: -59.8 MB). Peak memory consumption was 25.7 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 44.20 ms. Allocated memory is still 203.4 MB. Free memory was 163.1 MB in the beginning and 161.2 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 33.59 ms. Allocated memory is still 203.4 MB. Free memory was 161.2 MB in the beginning and 160.3 MB in the end (delta: 939.8 kB). Peak memory consumption was 939.8 kB. Max. memory is 7.1 GB. * RCFGBuilder took 360.36 ms. Allocated memory is still 203.4 MB. Free memory was 159.3 MB in the beginning and 139.1 MB in the end (delta: 20.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 272185.66 ms. Allocated memory was 203.4 MB in the beginning and 185.6 MB in the end (delta: -17.8 MB). Free memory was 139.1 MB in the beginning and 107.4 MB in the end (delta: 31.7 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.2s, 59 ProgramPointsBefore, 20 ProgramPointsAfterwards, 57 TransitionsBefore, 16 TransitionsAfterwards, 1032 CoEnabledTransitionPairs, 6 FixpointIterations, 12 TrivialSequentialCompositions, 27 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 9 ConcurrentYvCompositions, 2 ChoiceCompositions, 553 VarBasedMoverChecksPositive, 10 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 12 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 0 MoverChecksTotal, 879 CheckedPairsTotal, 48 TotalNumberOfCompositions - TimeoutResultAtElement [Line: 711]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 711). Cancelled while BasicCegarLoop was constructing difference of abstraction (273states) and FLOYD_HOARE automaton (currently 11 states, 17 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 25 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 53 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 272.0s, OverallIterations: 198, TraceHistogramMax: 6, AutomataDifference: 141.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.2s, HoareTripleCheckerStatistics: 2652 SDtfs, 18236 SDslu, 17713 SDs, 0 SdLazy, 12706 SolverSat, 4749 SolverUnsat, 6 SolverUnknown, 0 SolverNotchecked, 25.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5091 GetRequests, 954 SyntacticMatches, 174 SemanticMatches, 3962 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 20942 ImplicationChecksByTransitivity, 181.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=274occurred in iteration=158, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.8s AutomataMinimizationTime, 197 MinimizatonAttempts, 9760 StatesRemovedByMinimization, 196 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.1s SsaConstructionTime, 2.9s SatisfiabilityAnalysisTime, 78.6s InterpolantComputationTime, 4904 NumberOfCodeBlocks, 4902 NumberOfCodeBlocksAsserted, 600 NumberOfCheckSat, 4516 ConstructedInterpolants, 18 QuantifiedInterpolants, 481728 SizeOfPredicates, 188 NumberOfNonLiveVariables, 16617 ConjunctsInSsa, 1881 ConjunctsInUnsatCore, 388 InterpolantComputations, 10 PerfectInterpolantSequences, 30/1902 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 could not prove your program: Timeout Completed graceful shutdown