/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b09bf87 [2020-10-16 11:36:58,641 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-16 11:36:58,644 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-16 11:36:58,667 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-16 11:36:58,667 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-16 11:36:58,669 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-16 11:36:58,670 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-16 11:36:58,672 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-16 11:36:58,673 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-16 11:36:58,674 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-16 11:36:58,675 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-16 11:36:58,676 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-16 11:36:58,677 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-16 11:36:58,678 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-16 11:36:58,679 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-16 11:36:58,680 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-16 11:36:58,680 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-16 11:36:58,681 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-16 11:36:58,683 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-16 11:36:58,685 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-16 11:36:58,686 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-16 11:36:58,687 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-16 11:36:58,688 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-16 11:36:58,689 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-16 11:36:58,692 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-16 11:36:58,692 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-16 11:36:58,692 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-16 11:36:58,693 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-16 11:36:58,693 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-16 11:36:58,694 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-16 11:36:58,695 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-16 11:36:58,695 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-16 11:36:58,696 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-16 11:36:58,697 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-16 11:36:58,698 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-16 11:36:58,698 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-16 11:36:58,698 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-16 11:36:58,699 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-16 11:36:58,699 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-16 11:36:58,700 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-16 11:36:58,700 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-16 11:36:58,701 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf [2020-10-16 11:36:58,724 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-16 11:36:58,725 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-16 11:36:58,726 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-16 11:36:58,726 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-16 11:36:58,726 INFO L138 SettingsManager]: * Use SBE=true [2020-10-16 11:36:58,727 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-16 11:36:58,727 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-16 11:36:58,727 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-16 11:36:58,727 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-16 11:36:58,727 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-16 11:36:58,728 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-16 11:36:58,728 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-16 11:36:58,728 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-16 11:36:58,728 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-16 11:36:58,728 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-16 11:36:58,729 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-16 11:36:58,729 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-16 11:36:58,729 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-16 11:36:58,729 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-16 11:36:58,729 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-16 11:36:58,729 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-16 11:36:58,730 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 11:36:58,730 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-16 11:36:58,730 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-10-16 11:36:58,730 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-16 11:36:58,731 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-16 11:36:58,731 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-16 11:36:58,731 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-10-16 11:36:58,731 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-16 11:36:59,040 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-16 11:36:59,052 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-16 11:36:59,056 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-16 11:36:59,057 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-16 11:36:59,058 INFO L275 PluginConnector]: CDTParser initialized [2020-10-16 11:36:59,058 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longest-1.i [2020-10-16 11:36:59,119 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a0e906c5f/44d299e3b88c4a31bea00af0bd3060c4/FLAGb74091aee [2020-10-16 11:36:59,740 INFO L306 CDTParser]: Found 1 translation units. [2020-10-16 11:36:59,741 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread/fib_bench_longest-1.i [2020-10-16 11:36:59,756 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a0e906c5f/44d299e3b88c4a31bea00af0bd3060c4/FLAGb74091aee [2020-10-16 11:36:59,981 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a0e906c5f/44d299e3b88c4a31bea00af0bd3060c4 [2020-10-16 11:36:59,991 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-16 11:36:59,993 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-16 11:36:59,996 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-16 11:36:59,996 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-16 11:36:59,999 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-16 11:37:00,001 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 11:36:59" (1/1) ... [2020-10-16 11:37:00,004 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b35a12f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:00, skipping insertion in model container [2020-10-16 11:37:00,005 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 11:36:59" (1/1) ... [2020-10-16 11:37:00,013 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-16 11:37:00,074 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-16 11:37:00,559 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 11:37:00,573 INFO L203 MainTranslator]: Completed pre-run [2020-10-16 11:37:00,624 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 11:37:00,701 INFO L208 MainTranslator]: Completed translation [2020-10-16 11:37:00,701 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:00 WrapperNode [2020-10-16 11:37:00,702 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-16 11:37:00,702 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-16 11:37:00,703 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-16 11:37:00,703 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-16 11:37:00,711 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:00" (1/1) ... [2020-10-16 11:37:00,727 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:00" (1/1) ... [2020-10-16 11:37:00,755 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-16 11:37:00,755 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-16 11:37:00,756 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-16 11:37:00,756 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-16 11:37:00,765 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:00" (1/1) ... [2020-10-16 11:37:00,765 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:00" (1/1) ... [2020-10-16 11:37:00,769 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:00" (1/1) ... [2020-10-16 11:37:00,769 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:00" (1/1) ... [2020-10-16 11:37:00,776 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:00" (1/1) ... [2020-10-16 11:37:00,781 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:00" (1/1) ... [2020-10-16 11:37:00,783 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:00" (1/1) ... [2020-10-16 11:37:00,786 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-16 11:37:00,787 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-16 11:37:00,787 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-16 11:37:00,787 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-16 11:37:00,788 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:00" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 11:37:00,857 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-16 11:37:00,857 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-16 11:37:00,857 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-16 11:37:00,857 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-16 11:37:00,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-16 11:37:00,858 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-16 11:37:00,858 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-16 11:37:00,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-16 11:37:00,858 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-16 11:37:00,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-16 11:37:00,859 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-16 11:37:00,861 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-16 11:37:01,230 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-16 11:37:01,231 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-16 11:37:01,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 11:37:01 BoogieIcfgContainer [2020-10-16 11:37:01,233 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-16 11:37:01,235 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-16 11:37:01,235 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-16 11:37:01,239 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-16 11:37:01,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 11:36:59" (1/3) ... [2020-10-16 11:37:01,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fc3460c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 11:37:01, skipping insertion in model container [2020-10-16 11:37:01,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:00" (2/3) ... [2020-10-16 11:37:01,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fc3460c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 11:37:01, skipping insertion in model container [2020-10-16 11:37:01,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 11:37:01" (3/3) ... [2020-10-16 11:37:01,243 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longest-1.i [2020-10-16 11:37:01,256 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-16 11:37:01,256 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-16 11:37:01,263 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-16 11:37:01,264 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-16 11:37:01,288 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,289 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,289 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,289 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,290 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,290 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,290 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,291 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,291 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,291 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,292 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,292 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,292 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,293 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,293 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,293 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,294 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,294 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,294 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,295 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,295 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,295 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,296 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,302 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,303 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,303 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,304 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,304 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,304 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,305 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,308 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,309 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,309 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,309 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,309 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,310 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,316 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,316 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,316 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,317 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,317 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,317 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,320 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-10-16 11:37:01,331 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-16 11:37:01,352 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 11:37:01,352 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-16 11:37:01,352 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-16 11:37:01,353 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 11:37:01,353 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 11:37:01,353 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 11:37:01,353 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 11:37:01,353 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 11:37:01,366 INFO L137 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2020-10-16 11:37:01,367 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 59 places, 57 transitions, 124 flow [2020-10-16 11:37:01,370 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 59 places, 57 transitions, 124 flow [2020-10-16 11:37:01,372 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-10-16 11:37:01,410 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-10-16 11:37:01,411 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 11:37:01,417 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. [2020-10-16 11:37:01,420 INFO L117 LiptonReduction]: Number of co-enabled transitions 1032 [2020-10-16 11:37:02,514 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-10-16 11:37:02,612 INFO L132 LiptonReduction]: Checked pairs total: 1052 [2020-10-16 11:37:02,612 INFO L134 LiptonReduction]: Total number of compositions: 50 [2020-10-16 11:37:02,619 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-10-16 11:37:02,631 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-16 11:37:02,634 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-16 11:37:02,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-16 11:37:02,641 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:02,642 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-16 11:37:02,643 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:02,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:02,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1563716626, now seen corresponding path program 1 times [2020-10-16 11:37:02,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:02,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062077272] [2020-10-16 11:37:02,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:02,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:02,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:02,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062077272] [2020-10-16 11:37:02,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:37:02,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 11:37:02,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943509759] [2020-10-16 11:37:02,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 11:37:02,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:02,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 11:37:02,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-16 11:37:02,907 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-16 11:37:02,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:02,987 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-10-16 11:37:02,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 11:37:02,989 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-16 11:37:02,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:03,002 INFO L225 Difference]: With dead ends: 83 [2020-10-16 11:37:03,002 INFO L226 Difference]: Without dead ends: 54 [2020-10-16 11:37:03,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-16 11:37:03,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-16 11:37:03,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-10-16 11:37:03,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-16 11:37:03,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-10-16 11:37:03,046 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-10-16 11:37:03,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:03,047 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-10-16 11:37:03,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 11:37:03,047 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-10-16 11:37:03,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-16 11:37:03,048 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:03,048 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:03,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-16 11:37:03,049 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:03,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:03,050 INFO L82 PathProgramCache]: Analyzing trace with hash 956938306, now seen corresponding path program 1 times [2020-10-16 11:37:03,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:03,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635943274] [2020-10-16 11:37:03,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:03,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:03,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:03,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635943274] [2020-10-16 11:37:03,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:37:03,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 11:37:03,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199804262] [2020-10-16 11:37:03,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 11:37:03,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:03,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 11:37:03,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-16 11:37:03,170 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 5 states. [2020-10-16 11:37:03,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:03,230 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2020-10-16 11:37:03,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 11:37:03,231 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-16 11:37:03,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:03,233 INFO L225 Difference]: With dead ends: 80 [2020-10-16 11:37:03,233 INFO L226 Difference]: Without dead ends: 75 [2020-10-16 11:37:03,234 INFO L677 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 [2020-10-16 11:37:03,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-16 11:37:03,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-10-16 11:37:03,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-16 11:37:03,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-10-16 11:37:03,245 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2020-10-16 11:37:03,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:03,246 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-10-16 11:37:03,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 11:37:03,246 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-10-16 11:37:03,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-16 11:37:03,247 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:03,247 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:03,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-16 11:37:03,248 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:03,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:03,248 INFO L82 PathProgramCache]: Analyzing trace with hash 507192011, now seen corresponding path program 1 times [2020-10-16 11:37:03,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:03,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668859647] [2020-10-16 11:37:03,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:03,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:03,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:03,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668859647] [2020-10-16 11:37:03,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:37:03,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 11:37:03,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279301019] [2020-10-16 11:37:03,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 11:37:03,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:03,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 11:37:03,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-16 11:37:03,329 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 5 states. [2020-10-16 11:37:03,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:03,358 INFO L93 Difference]: Finished difference Result 73 states and 170 transitions. [2020-10-16 11:37:03,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 11:37:03,358 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-16 11:37:03,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:03,360 INFO L225 Difference]: With dead ends: 73 [2020-10-16 11:37:03,360 INFO L226 Difference]: Without dead ends: 70 [2020-10-16 11:37:03,361 INFO L677 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 [2020-10-16 11:37:03,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-16 11:37:03,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-10-16 11:37:03,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-16 11:37:03,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 152 transitions. [2020-10-16 11:37:03,371 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 152 transitions. Word has length 8 [2020-10-16 11:37:03,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:03,372 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 152 transitions. [2020-10-16 11:37:03,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 11:37:03,372 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 152 transitions. [2020-10-16 11:37:03,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-16 11:37:03,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:03,373 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:03,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-16 11:37:03,374 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:03,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:03,374 INFO L82 PathProgramCache]: Analyzing trace with hash 507214331, now seen corresponding path program 2 times [2020-10-16 11:37:03,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:03,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514352551] [2020-10-16 11:37:03,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:03,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:03,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:03,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514352551] [2020-10-16 11:37:03,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:37:03,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 11:37:03,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675450523] [2020-10-16 11:37:03,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 11:37:03,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:03,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 11:37:03,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-16 11:37:03,466 INFO L87 Difference]: Start difference. First operand 64 states and 152 transitions. Second operand 5 states. [2020-10-16 11:37:03,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:03,516 INFO L93 Difference]: Finished difference Result 86 states and 202 transitions. [2020-10-16 11:37:03,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 11:37:03,517 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-16 11:37:03,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:03,519 INFO L225 Difference]: With dead ends: 86 [2020-10-16 11:37:03,519 INFO L226 Difference]: Without dead ends: 80 [2020-10-16 11:37:03,519 INFO L677 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 [2020-10-16 11:37:03,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-16 11:37:03,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-10-16 11:37:03,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-16 11:37:03,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-10-16 11:37:03,529 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-10-16 11:37:03,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:03,529 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-10-16 11:37:03,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 11:37:03,530 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-10-16 11:37:03,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-16 11:37:03,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:03,531 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:03,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-16 11:37:03,532 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:03,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:03,532 INFO L82 PathProgramCache]: Analyzing trace with hash -399661872, now seen corresponding path program 2 times [2020-10-16 11:37:03,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:03,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825416537] [2020-10-16 11:37:03,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:03,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:03,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:03,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825416537] [2020-10-16 11:37:03,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728438720] [2020-10-16 11:37:03,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:03,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:03,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:03,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 11:37:03,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:03,818 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:37:03,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:03,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:03,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-10-16 11:37:03,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475918867] [2020-10-16 11:37:03,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 11:37:03,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:03,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 11:37:03,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-16 11:37:03,845 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 10 states. [2020-10-16 11:37:03,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:03,923 INFO L93 Difference]: Finished difference Result 101 states and 235 transitions. [2020-10-16 11:37:03,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 11:37:03,924 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2020-10-16 11:37:03,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:03,925 INFO L225 Difference]: With dead ends: 101 [2020-10-16 11:37:03,925 INFO L226 Difference]: Without dead ends: 96 [2020-10-16 11:37:03,926 INFO L677 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 [2020-10-16 11:37:03,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-16 11:37:03,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2020-10-16 11:37:03,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-16 11:37:03,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 173 transitions. [2020-10-16 11:37:03,934 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 173 transitions. Word has length 9 [2020-10-16 11:37:03,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:03,935 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 173 transitions. [2020-10-16 11:37:03,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 11:37:03,935 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 173 transitions. [2020-10-16 11:37:03,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-16 11:37:03,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:03,936 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:04,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:04,151 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:04,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:04,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1456916488, now seen corresponding path program 3 times [2020-10-16 11:37:04,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:04,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020912195] [2020-10-16 11:37:04,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:04,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:04,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:04,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020912195] [2020-10-16 11:37:04,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939176926] [2020-10-16 11:37:04,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:04,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 11:37:04,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:04,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 11:37:04,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:04,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:04,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:04,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-16 11:37:04,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818357330] [2020-10-16 11:37:04,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 11:37:04,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:04,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 11:37:04,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-10-16 11:37:04,367 INFO L87 Difference]: Start difference. First operand 71 states and 173 transitions. Second operand 9 states. [2020-10-16 11:37:04,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:04,451 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-10-16 11:37:04,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 11:37:04,451 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-16 11:37:04,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:04,452 INFO L225 Difference]: With dead ends: 88 [2020-10-16 11:37:04,453 INFO L226 Difference]: Without dead ends: 85 [2020-10-16 11:37:04,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-16 11:37:04,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-16 11:37:04,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 76. [2020-10-16 11:37:04,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-16 11:37:04,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 183 transitions. [2020-10-16 11:37:04,472 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 183 transitions. Word has length 9 [2020-10-16 11:37:04,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:04,475 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 183 transitions. [2020-10-16 11:37:04,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 11:37:04,476 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 183 transitions. [2020-10-16 11:37:04,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-16 11:37:04,477 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:04,477 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:04,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:04,694 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:04,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:04,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1456224568, now seen corresponding path program 4 times [2020-10-16 11:37:04,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:04,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932944858] [2020-10-16 11:37:04,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:04,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:04,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:04,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932944858] [2020-10-16 11:37:04,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887690129] [2020-10-16 11:37:04,755 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:04,824 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:37:04,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:04,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 11:37:04,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:04,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:04,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:04,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-16 11:37:04,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016621272] [2020-10-16 11:37:04,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 11:37:04,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:04,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 11:37:04,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-16 11:37:04,888 INFO L87 Difference]: Start difference. First operand 76 states and 183 transitions. Second operand 9 states. [2020-10-16 11:37:04,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:04,959 INFO L93 Difference]: Finished difference Result 94 states and 221 transitions. [2020-10-16 11:37:04,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 11:37:04,962 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-16 11:37:04,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:04,963 INFO L225 Difference]: With dead ends: 94 [2020-10-16 11:37:04,963 INFO L226 Difference]: Without dead ends: 91 [2020-10-16 11:37:04,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:37:04,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-16 11:37:04,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 78. [2020-10-16 11:37:04,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-16 11:37:04,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 190 transitions. [2020-10-16 11:37:04,978 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 190 transitions. Word has length 9 [2020-10-16 11:37:04,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:04,978 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 190 transitions. [2020-10-16 11:37:04,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 11:37:04,978 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 190 transitions. [2020-10-16 11:37:04,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-16 11:37:04,979 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:04,979 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:05,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:05,198 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:05,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:05,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1456202248, now seen corresponding path program 5 times [2020-10-16 11:37:05,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:05,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228548613] [2020-10-16 11:37:05,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:05,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:05,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:05,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228548613] [2020-10-16 11:37:05,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669070959] [2020-10-16 11:37:05,267 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:05,313 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:05,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:05,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 11:37:05,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:05,363 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:37:05,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:05,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:05,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-16 11:37:05,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20771573] [2020-10-16 11:37:05,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 11:37:05,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:05,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 11:37:05,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-16 11:37:05,377 INFO L87 Difference]: Start difference. First operand 78 states and 190 transitions. Second operand 9 states. [2020-10-16 11:37:05,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:05,502 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-10-16 11:37:05,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 11:37:05,503 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-16 11:37:05,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:05,504 INFO L225 Difference]: With dead ends: 103 [2020-10-16 11:37:05,504 INFO L226 Difference]: Without dead ends: 97 [2020-10-16 11:37:05,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:37:05,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-16 11:37:05,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 79. [2020-10-16 11:37:05,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-16 11:37:05,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 194 transitions. [2020-10-16 11:37:05,512 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 194 transitions. Word has length 9 [2020-10-16 11:37:05,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:05,513 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 194 transitions. [2020-10-16 11:37:05,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 11:37:05,513 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 194 transitions. [2020-10-16 11:37:05,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 11:37:05,514 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:05,514 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:05,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:05,728 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:05,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:05,729 INFO L82 PathProgramCache]: Analyzing trace with hash 484301959, now seen corresponding path program 1 times [2020-10-16 11:37:05,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:05,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4807028] [2020-10-16 11:37:05,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:05,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:05,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:05,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4807028] [2020-10-16 11:37:05,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:37:05,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 11:37:05,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286039321] [2020-10-16 11:37:05,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 11:37:05,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:05,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 11:37:05,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-16 11:37:05,796 INFO L87 Difference]: Start difference. First operand 79 states and 194 transitions. Second operand 6 states. [2020-10-16 11:37:05,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:05,838 INFO L93 Difference]: Finished difference Result 100 states and 234 transitions. [2020-10-16 11:37:05,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 11:37:05,839 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-16 11:37:05,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:05,840 INFO L225 Difference]: With dead ends: 100 [2020-10-16 11:37:05,840 INFO L226 Difference]: Without dead ends: 98 [2020-10-16 11:37:05,841 INFO L677 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 [2020-10-16 11:37:05,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-16 11:37:05,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 83. [2020-10-16 11:37:05,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-16 11:37:05,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 200 transitions. [2020-10-16 11:37:05,847 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 200 transitions. Word has length 10 [2020-10-16 11:37:05,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:05,847 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 200 transitions. [2020-10-16 11:37:05,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 11:37:05,847 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 200 transitions. [2020-10-16 11:37:05,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 11:37:05,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:05,849 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:05,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-16 11:37:05,849 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:05,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:05,850 INFO L82 PathProgramCache]: Analyzing trace with hash 484324279, now seen corresponding path program 2 times [2020-10-16 11:37:05,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:05,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055601966] [2020-10-16 11:37:05,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:05,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:05,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:05,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055601966] [2020-10-16 11:37:05,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:37:05,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 11:37:05,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759186701] [2020-10-16 11:37:05,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 11:37:05,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:05,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 11:37:05,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-16 11:37:05,907 INFO L87 Difference]: Start difference. First operand 83 states and 200 transitions. Second operand 6 states. [2020-10-16 11:37:05,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:05,987 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-10-16 11:37:05,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 11:37:05,988 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-16 11:37:05,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:05,989 INFO L225 Difference]: With dead ends: 105 [2020-10-16 11:37:05,990 INFO L226 Difference]: Without dead ends: 100 [2020-10-16 11:37:05,990 INFO L677 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 [2020-10-16 11:37:05,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-16 11:37:05,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-10-16 11:37:05,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-16 11:37:05,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 198 transitions. [2020-10-16 11:37:05,996 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 198 transitions. Word has length 10 [2020-10-16 11:37:05,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:05,996 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 198 transitions. [2020-10-16 11:37:05,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 11:37:05,997 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 198 transitions. [2020-10-16 11:37:05,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 11:37:05,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:05,998 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:05,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-16 11:37:05,998 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:05,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:05,999 INFO L82 PathProgramCache]: Analyzing trace with hash 484353109, now seen corresponding path program 3 times [2020-10-16 11:37:05,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:05,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026948405] [2020-10-16 11:37:05,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:06,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:06,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:06,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026948405] [2020-10-16 11:37:06,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:37:06,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 11:37:06,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048071678] [2020-10-16 11:37:06,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 11:37:06,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:06,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 11:37:06,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-16 11:37:06,063 INFO L87 Difference]: Start difference. First operand 82 states and 198 transitions. Second operand 6 states. [2020-10-16 11:37:06,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:06,182 INFO L93 Difference]: Finished difference Result 105 states and 248 transitions. [2020-10-16 11:37:06,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 11:37:06,182 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-16 11:37:06,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:06,184 INFO L225 Difference]: With dead ends: 105 [2020-10-16 11:37:06,184 INFO L226 Difference]: Without dead ends: 100 [2020-10-16 11:37:06,184 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-10-16 11:37:06,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-16 11:37:06,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-10-16 11:37:06,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-16 11:37:06,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 194 transitions. [2020-10-16 11:37:06,190 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 194 transitions. Word has length 10 [2020-10-16 11:37:06,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:06,190 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 194 transitions. [2020-10-16 11:37:06,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 11:37:06,190 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 194 transitions. [2020-10-16 11:37:06,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 11:37:06,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:06,191 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:06,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-16 11:37:06,192 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:06,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:06,192 INFO L82 PathProgramCache]: Analyzing trace with hash 495405570, now seen corresponding path program 3 times [2020-10-16 11:37:06,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:06,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849456522] [2020-10-16 11:37:06,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:06,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:06,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:06,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849456522] [2020-10-16 11:37:06,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584753750] [2020-10-16 11:37:06,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:06,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 11:37:06,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:06,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:06,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:06,401 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:37:06,422 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:06,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:06,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-10-16 11:37:06,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671184382] [2020-10-16 11:37:06,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 11:37:06,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:06,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 11:37:06,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:37:06,424 INFO L87 Difference]: Start difference. First operand 82 states and 194 transitions. Second operand 12 states. [2020-10-16 11:37:06,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:06,513 INFO L93 Difference]: Finished difference Result 122 states and 284 transitions. [2020-10-16 11:37:06,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:37:06,514 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2020-10-16 11:37:06,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:06,515 INFO L225 Difference]: With dead ends: 122 [2020-10-16 11:37:06,515 INFO L226 Difference]: Without dead ends: 117 [2020-10-16 11:37:06,516 INFO L677 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 [2020-10-16 11:37:06,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-16 11:37:06,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 88. [2020-10-16 11:37:06,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-16 11:37:06,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 215 transitions. [2020-10-16 11:37:06,520 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 215 transitions. Word has length 10 [2020-10-16 11:37:06,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:06,521 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 215 transitions. [2020-10-16 11:37:06,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 11:37:06,521 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 215 transitions. [2020-10-16 11:37:06,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 11:37:06,522 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:06,522 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:06,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-10-16 11:37:06,736 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:06,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:06,736 INFO L82 PathProgramCache]: Analyzing trace with hash 2080229483, now seen corresponding path program 6 times [2020-10-16 11:37:06,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:06,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158021998] [2020-10-16 11:37:06,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:06,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:06,793 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:06,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158021998] [2020-10-16 11:37:06,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536479772] [2020-10-16 11:37:06,794 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:06,841 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:37:06,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:06,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:06,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:06,915 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:06,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:06,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:06,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602164129] [2020-10-16 11:37:06,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:06,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:06,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:06,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:06,917 INFO L87 Difference]: Start difference. First operand 88 states and 215 transitions. Second operand 11 states. [2020-10-16 11:37:06,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:06,983 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-10-16 11:37:06,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 11:37:06,984 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-16 11:37:06,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:06,984 INFO L225 Difference]: With dead ends: 108 [2020-10-16 11:37:06,985 INFO L226 Difference]: Without dead ends: 105 [2020-10-16 11:37:06,985 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:37:06,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-16 11:37:06,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 91. [2020-10-16 11:37:06,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-16 11:37:06,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 221 transitions. [2020-10-16 11:37:06,991 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 221 transitions. Word has length 10 [2020-10-16 11:37:06,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:06,991 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 221 transitions. [2020-10-16 11:37:06,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:06,992 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 221 transitions. [2020-10-16 11:37:06,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 11:37:06,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:06,993 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:07,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:07,202 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:07,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:07,203 INFO L82 PathProgramCache]: Analyzing trace with hash 2101679003, now seen corresponding path program 7 times [2020-10-16 11:37:07,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:07,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054127468] [2020-10-16 11:37:07,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:07,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:07,267 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:07,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054127468] [2020-10-16 11:37:07,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181983304] [2020-10-16 11:37:07,268 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:07,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:07,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:07,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:07,395 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:07,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:07,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:07,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432667958] [2020-10-16 11:37:07,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:07,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:07,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:07,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:07,397 INFO L87 Difference]: Start difference. First operand 91 states and 221 transitions. Second operand 11 states. [2020-10-16 11:37:07,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:07,513 INFO L93 Difference]: Finished difference Result 116 states and 270 transitions. [2020-10-16 11:37:07,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 11:37:07,515 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-16 11:37:07,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:07,516 INFO L225 Difference]: With dead ends: 116 [2020-10-16 11:37:07,516 INFO L226 Difference]: Without dead ends: 113 [2020-10-16 11:37:07,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:07,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-16 11:37:07,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 92. [2020-10-16 11:37:07,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-16 11:37:07,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 223 transitions. [2020-10-16 11:37:07,522 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 223 transitions. Word has length 10 [2020-10-16 11:37:07,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:07,523 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 223 transitions. [2020-10-16 11:37:07,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:07,523 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 223 transitions. [2020-10-16 11:37:07,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 11:37:07,523 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:07,524 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:07,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-10-16 11:37:07,737 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:07,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:07,738 INFO L82 PathProgramCache]: Analyzing trace with hash 2102370923, now seen corresponding path program 8 times [2020-10-16 11:37:07,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:07,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528001877] [2020-10-16 11:37:07,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:07,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:07,810 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:07,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528001877] [2020-10-16 11:37:07,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845443380] [2020-10-16 11:37:07,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:07,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:07,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:07,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:07,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:07,965 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:07,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:07,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:07,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070800853] [2020-10-16 11:37:07,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:07,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:07,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:07,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:07,967 INFO L87 Difference]: Start difference. First operand 92 states and 223 transitions. Second operand 11 states. [2020-10-16 11:37:08,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:08,086 INFO L93 Difference]: Finished difference Result 115 states and 270 transitions. [2020-10-16 11:37:08,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 11:37:08,086 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-16 11:37:08,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:08,088 INFO L225 Difference]: With dead ends: 115 [2020-10-16 11:37:08,088 INFO L226 Difference]: Without dead ends: 112 [2020-10-16 11:37:08,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:37:08,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-16 11:37:08,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 94. [2020-10-16 11:37:08,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-16 11:37:08,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 230 transitions. [2020-10-16 11:37:08,093 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 230 transitions. Word has length 10 [2020-10-16 11:37:08,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:08,094 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 230 transitions. [2020-10-16 11:37:08,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:08,094 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 230 transitions. [2020-10-16 11:37:08,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 11:37:08,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:08,095 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:08,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-16 11:37:08,307 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:08,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:08,308 INFO L82 PathProgramCache]: Analyzing trace with hash 2102393243, now seen corresponding path program 9 times [2020-10-16 11:37:08,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:08,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435141633] [2020-10-16 11:37:08,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:08,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:08,364 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:08,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435141633] [2020-10-16 11:37:08,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770246963] [2020-10-16 11:37:08,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:08,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 11:37:08,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:08,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:08,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:08,490 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:37:08,507 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:08,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:08,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:08,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837566168] [2020-10-16 11:37:08,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:08,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:08,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:08,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:08,509 INFO L87 Difference]: Start difference. First operand 94 states and 230 transitions. Second operand 11 states. [2020-10-16 11:37:08,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:08,719 INFO L93 Difference]: Finished difference Result 124 states and 294 transitions. [2020-10-16 11:37:08,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:37:08,719 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-16 11:37:08,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:08,721 INFO L225 Difference]: With dead ends: 124 [2020-10-16 11:37:08,721 INFO L226 Difference]: Without dead ends: 118 [2020-10-16 11:37:08,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:37:08,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-16 11:37:08,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94. [2020-10-16 11:37:08,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-16 11:37:08,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-10-16 11:37:08,728 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 10 [2020-10-16 11:37:08,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:08,728 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-10-16 11:37:08,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:08,728 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-10-16 11:37:08,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:08,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:08,729 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:08,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-16 11:37:08,930 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:08,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:08,931 INFO L82 PathProgramCache]: Analyzing trace with hash 2107902445, now seen corresponding path program 4 times [2020-10-16 11:37:08,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:08,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736258747] [2020-10-16 11:37:08,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:08,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:09,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:09,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736258747] [2020-10-16 11:37:09,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349747255] [2020-10-16 11:37:09,021 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:09,078 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:37:09,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:09,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:09,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:09,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:09,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:09,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:09,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277096862] [2020-10-16 11:37:09,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:09,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:09,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:09,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:09,172 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 11 states. [2020-10-16 11:37:09,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:09,209 INFO L93 Difference]: Finished difference Result 113 states and 270 transitions. [2020-10-16 11:37:09,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 11:37:09,209 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 11:37:09,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:09,210 INFO L225 Difference]: With dead ends: 113 [2020-10-16 11:37:09,210 INFO L226 Difference]: Without dead ends: 111 [2020-10-16 11:37:09,211 INFO L677 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 [2020-10-16 11:37:09,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-16 11:37:09,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 96. [2020-10-16 11:37:09,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-16 11:37:09,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 238 transitions. [2020-10-16 11:37:09,214 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 238 transitions. Word has length 11 [2020-10-16 11:37:09,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:09,215 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 238 transitions. [2020-10-16 11:37:09,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:09,215 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 238 transitions. [2020-10-16 11:37:09,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:09,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:09,216 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:09,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-16 11:37:09,426 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:09,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:09,426 INFO L82 PathProgramCache]: Analyzing trace with hash 2107903406, now seen corresponding path program 5 times [2020-10-16 11:37:09,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:09,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751955401] [2020-10-16 11:37:09,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:09,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:09,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:09,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751955401] [2020-10-16 11:37:09,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865912469] [2020-10-16 11:37:09,482 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:09,541 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:09,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:09,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:09,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:09,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:09,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:09,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:09,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803929234] [2020-10-16 11:37:09,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:09,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:09,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:09,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:09,608 INFO L87 Difference]: Start difference. First operand 96 states and 238 transitions. Second operand 11 states. [2020-10-16 11:37:09,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:09,686 INFO L93 Difference]: Finished difference Result 118 states and 280 transitions. [2020-10-16 11:37:09,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 11:37:09,687 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 11:37:09,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:09,688 INFO L225 Difference]: With dead ends: 118 [2020-10-16 11:37:09,688 INFO L226 Difference]: Without dead ends: 116 [2020-10-16 11:37:09,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:37:09,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-16 11:37:09,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 97. [2020-10-16 11:37:09,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-16 11:37:09,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 239 transitions. [2020-10-16 11:37:09,692 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 239 transitions. Word has length 11 [2020-10-16 11:37:09,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:09,692 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 239 transitions. [2020-10-16 11:37:09,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:09,693 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 239 transitions. [2020-10-16 11:37:09,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:09,693 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:09,693 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:09,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-16 11:37:09,905 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:09,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:09,905 INFO L82 PathProgramCache]: Analyzing trace with hash 2107932236, now seen corresponding path program 6 times [2020-10-16 11:37:09,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:09,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063195036] [2020-10-16 11:37:09,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:09,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:09,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:09,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063195036] [2020-10-16 11:37:09,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756784310] [2020-10-16 11:37:09,978 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:10,025 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:37:10,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:10,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:10,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:10,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:10,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:10,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:10,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170750169] [2020-10-16 11:37:10,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:10,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:10,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:10,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:10,096 INFO L87 Difference]: Start difference. First operand 97 states and 239 transitions. Second operand 11 states. [2020-10-16 11:37:10,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:10,202 INFO L93 Difference]: Finished difference Result 117 states and 278 transitions. [2020-10-16 11:37:10,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 11:37:10,202 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 11:37:10,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:10,203 INFO L225 Difference]: With dead ends: 117 [2020-10-16 11:37:10,203 INFO L226 Difference]: Without dead ends: 115 [2020-10-16 11:37:10,204 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:37:10,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-16 11:37:10,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 98. [2020-10-16 11:37:10,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-16 11:37:10,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 241 transitions. [2020-10-16 11:37:10,208 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 241 transitions. Word has length 11 [2020-10-16 11:37:10,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:10,208 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 241 transitions. [2020-10-16 11:37:10,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:10,208 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 241 transitions. [2020-10-16 11:37:10,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:10,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:10,209 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:10,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:10,418 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:10,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:10,418 INFO L82 PathProgramCache]: Analyzing trace with hash 2128458235, now seen corresponding path program 7 times [2020-10-16 11:37:10,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:10,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525318311] [2020-10-16 11:37:10,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:10,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:10,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:10,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525318311] [2020-10-16 11:37:10,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354219998] [2020-10-16 11:37:10,493 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:10,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:10,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:10,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:10,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:10,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:10,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:10,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049831531] [2020-10-16 11:37:10,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:10,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:10,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:10,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:10,633 INFO L87 Difference]: Start difference. First operand 98 states and 241 transitions. Second operand 11 states. [2020-10-16 11:37:10,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:10,693 INFO L93 Difference]: Finished difference Result 122 states and 288 transitions. [2020-10-16 11:37:10,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 11:37:10,696 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 11:37:10,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:10,697 INFO L225 Difference]: With dead ends: 122 [2020-10-16 11:37:10,697 INFO L226 Difference]: Without dead ends: 120 [2020-10-16 11:37:10,697 INFO L677 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 [2020-10-16 11:37:10,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-16 11:37:10,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 100. [2020-10-16 11:37:10,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-16 11:37:10,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 247 transitions. [2020-10-16 11:37:10,701 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 247 transitions. Word has length 11 [2020-10-16 11:37:10,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:10,702 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 247 transitions. [2020-10-16 11:37:10,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:10,702 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 247 transitions. [2020-10-16 11:37:10,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:10,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:10,703 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:10,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2020-10-16 11:37:10,912 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:10,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:10,912 INFO L82 PathProgramCache]: Analyzing trace with hash 2128459196, now seen corresponding path program 8 times [2020-10-16 11:37:10,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:10,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056828059] [2020-10-16 11:37:10,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:10,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:10,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:10,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056828059] [2020-10-16 11:37:10,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612338616] [2020-10-16 11:37:10,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:11,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:11,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:11,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:11,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:11,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:11,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:11,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:11,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124912822] [2020-10-16 11:37:11,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:11,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:11,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:11,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:11,112 INFO L87 Difference]: Start difference. First operand 100 states and 247 transitions. Second operand 11 states. [2020-10-16 11:37:11,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:11,173 INFO L93 Difference]: Finished difference Result 123 states and 290 transitions. [2020-10-16 11:37:11,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 11:37:11,173 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 11:37:11,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:11,174 INFO L225 Difference]: With dead ends: 123 [2020-10-16 11:37:11,174 INFO L226 Difference]: Without dead ends: 121 [2020-10-16 11:37:11,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:11,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-16 11:37:11,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 99. [2020-10-16 11:37:11,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-16 11:37:11,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 243 transitions. [2020-10-16 11:37:11,179 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 243 transitions. Word has length 11 [2020-10-16 11:37:11,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:11,179 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 243 transitions. [2020-10-16 11:37:11,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:11,179 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 243 transitions. [2020-10-16 11:37:11,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:11,180 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:11,180 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:11,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:11,389 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:11,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:11,389 INFO L82 PathProgramCache]: Analyzing trace with hash 2129121325, now seen corresponding path program 9 times [2020-10-16 11:37:11,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:11,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834324974] [2020-10-16 11:37:11,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:11,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:11,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:11,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834324974] [2020-10-16 11:37:11,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085800442] [2020-10-16 11:37:11,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:11,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 11:37:11,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:11,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:11,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:11,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:11,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:11,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:11,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342665228] [2020-10-16 11:37:11,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:11,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:11,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:11,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:11,579 INFO L87 Difference]: Start difference. First operand 99 states and 243 transitions. Second operand 11 states. [2020-10-16 11:37:11,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:11,660 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-10-16 11:37:11,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 11:37:11,660 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 11:37:11,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:11,661 INFO L225 Difference]: With dead ends: 123 [2020-10-16 11:37:11,662 INFO L226 Difference]: Without dead ends: 121 [2020-10-16 11:37:11,662 INFO L677 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 [2020-10-16 11:37:11,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-16 11:37:11,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 103. [2020-10-16 11:37:11,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-16 11:37:11,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 249 transitions. [2020-10-16 11:37:11,669 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 249 transitions. Word has length 11 [2020-10-16 11:37:11,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:11,670 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 249 transitions. [2020-10-16 11:37:11,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:11,670 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 249 transitions. [2020-10-16 11:37:11,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:11,670 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:11,671 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:11,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-16 11:37:11,882 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:11,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:11,882 INFO L82 PathProgramCache]: Analyzing trace with hash 2129143645, now seen corresponding path program 10 times [2020-10-16 11:37:11,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:11,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644858737] [2020-10-16 11:37:11,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:11,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:11,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:11,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644858737] [2020-10-16 11:37:11,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69525587] [2020-10-16 11:37:11,977 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:12,024 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:37:12,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:12,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:12,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:12,091 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:37:12,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:12,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:12,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:12,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609285656] [2020-10-16 11:37:12,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:12,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:12,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:12,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:12,131 INFO L87 Difference]: Start difference. First operand 103 states and 249 transitions. Second operand 11 states. [2020-10-16 11:37:12,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:12,348 INFO L93 Difference]: Finished difference Result 133 states and 314 transitions. [2020-10-16 11:37:12,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:37:12,348 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 11:37:12,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:12,349 INFO L225 Difference]: With dead ends: 133 [2020-10-16 11:37:12,350 INFO L226 Difference]: Without dead ends: 128 [2020-10-16 11:37:12,350 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:37:12,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-16 11:37:12,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2020-10-16 11:37:12,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-16 11:37:12,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 247 transitions. [2020-10-16 11:37:12,354 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 247 transitions. Word has length 11 [2020-10-16 11:37:12,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:12,354 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 247 transitions. [2020-10-16 11:37:12,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:12,354 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 247 transitions. [2020-10-16 11:37:12,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:12,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:12,357 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:12,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:12,558 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:12,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:12,559 INFO L82 PathProgramCache]: Analyzing trace with hash 2129151116, now seen corresponding path program 11 times [2020-10-16 11:37:12,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:12,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090577728] [2020-10-16 11:37:12,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:12,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:12,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:12,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090577728] [2020-10-16 11:37:12,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660407067] [2020-10-16 11:37:12,608 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:12,651 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:12,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:12,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:12,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:12,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:12,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:12,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:12,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361486793] [2020-10-16 11:37:12,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:12,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:12,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:12,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:12,711 INFO L87 Difference]: Start difference. First operand 102 states and 247 transitions. Second operand 11 states. [2020-10-16 11:37:12,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:12,846 INFO L93 Difference]: Finished difference Result 127 states and 298 transitions. [2020-10-16 11:37:12,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 11:37:12,846 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 11:37:12,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:12,847 INFO L225 Difference]: With dead ends: 127 [2020-10-16 11:37:12,848 INFO L226 Difference]: Without dead ends: 125 [2020-10-16 11:37:12,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:37:12,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-16 11:37:12,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 104. [2020-10-16 11:37:12,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-16 11:37:12,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-10-16 11:37:12,852 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-10-16 11:37:12,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:12,852 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-10-16 11:37:12,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:12,852 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-10-16 11:37:12,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:12,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:12,853 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:13,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-16 11:37:13,064 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:13,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:13,064 INFO L82 PathProgramCache]: Analyzing trace with hash 2129172475, now seen corresponding path program 12 times [2020-10-16 11:37:13,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:13,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901655729] [2020-10-16 11:37:13,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:13,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:13,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:13,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901655729] [2020-10-16 11:37:13,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183950726] [2020-10-16 11:37:13,113 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:13,170 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:37:13,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:13,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:13,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:13,233 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:37:13,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:13,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:13,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:13,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373934415] [2020-10-16 11:37:13,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:13,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:13,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:13,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:13,247 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-10-16 11:37:13,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:13,470 INFO L93 Difference]: Finished difference Result 141 states and 334 transitions. [2020-10-16 11:37:13,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:37:13,471 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 11:37:13,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:13,472 INFO L225 Difference]: With dead ends: 141 [2020-10-16 11:37:13,472 INFO L226 Difference]: Without dead ends: 136 [2020-10-16 11:37:13,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:37:13,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-16 11:37:13,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 104. [2020-10-16 11:37:13,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-16 11:37:13,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-10-16 11:37:13,479 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-10-16 11:37:13,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:13,479 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-10-16 11:37:13,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:13,479 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-10-16 11:37:13,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:13,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:13,481 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:13,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-16 11:37:13,682 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:13,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:13,683 INFO L82 PathProgramCache]: Analyzing trace with hash 2129173436, now seen corresponding path program 13 times [2020-10-16 11:37:13,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:13,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955007643] [2020-10-16 11:37:13,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:13,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:13,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:13,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955007643] [2020-10-16 11:37:13,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485483955] [2020-10-16 11:37:13,733 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:13,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:13,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:13,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:13,838 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:37:13,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:13,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:13,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:13,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002366574] [2020-10-16 11:37:13,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:13,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:13,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:13,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:13,854 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-10-16 11:37:14,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:14,034 INFO L93 Difference]: Finished difference Result 136 states and 319 transitions. [2020-10-16 11:37:14,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:37:14,035 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 11:37:14,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:14,036 INFO L225 Difference]: With dead ends: 136 [2020-10-16 11:37:14,036 INFO L226 Difference]: Without dead ends: 131 [2020-10-16 11:37:14,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:37:14,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-16 11:37:14,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2020-10-16 11:37:14,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-16 11:37:14,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 245 transitions. [2020-10-16 11:37:14,041 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 245 transitions. Word has length 11 [2020-10-16 11:37:14,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:14,041 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 245 transitions. [2020-10-16 11:37:14,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:14,042 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 245 transitions. [2020-10-16 11:37:14,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:14,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:14,042 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:14,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-16 11:37:14,252 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:14,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:14,253 INFO L82 PathProgramCache]: Analyzing trace with hash 2129381756, now seen corresponding path program 14 times [2020-10-16 11:37:14,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:14,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620827696] [2020-10-16 11:37:14,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:14,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:14,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:14,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620827696] [2020-10-16 11:37:14,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637110885] [2020-10-16 11:37:14,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:14,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:14,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:14,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:14,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:14,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:14,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:14,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:14,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262368355] [2020-10-16 11:37:14,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:14,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:14,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:14,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:14,423 INFO L87 Difference]: Start difference. First operand 101 states and 245 transitions. Second operand 11 states. [2020-10-16 11:37:14,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:14,549 INFO L93 Difference]: Finished difference Result 128 states and 297 transitions. [2020-10-16 11:37:14,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:37:14,549 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 11:37:14,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:14,551 INFO L225 Difference]: With dead ends: 128 [2020-10-16 11:37:14,551 INFO L226 Difference]: Without dead ends: 126 [2020-10-16 11:37:14,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:37:14,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-16 11:37:14,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 99. [2020-10-16 11:37:14,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-16 11:37:14,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-10-16 11:37:14,555 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-10-16 11:37:14,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:14,556 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-10-16 11:37:14,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:14,556 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-10-16 11:37:14,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:14,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:14,556 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:14,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-10-16 11:37:14,769 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:14,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:14,769 INFO L82 PathProgramCache]: Analyzing trace with hash 2130044846, now seen corresponding path program 15 times [2020-10-16 11:37:14,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:14,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691576468] [2020-10-16 11:37:14,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:14,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:14,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:14,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691576468] [2020-10-16 11:37:14,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319790583] [2020-10-16 11:37:14,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:14,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 11:37:14,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:14,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:14,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:14,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:14,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:14,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:14,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966612968] [2020-10-16 11:37:14,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:14,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:14,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:14,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:14,926 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-10-16 11:37:15,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:15,140 INFO L93 Difference]: Finished difference Result 126 states and 293 transitions. [2020-10-16 11:37:15,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 11:37:15,141 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 11:37:15,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:15,142 INFO L225 Difference]: With dead ends: 126 [2020-10-16 11:37:15,142 INFO L226 Difference]: Without dead ends: 124 [2020-10-16 11:37:15,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:37:15,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-16 11:37:15,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 101. [2020-10-16 11:37:15,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-16 11:37:15,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-10-16 11:37:15,147 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-10-16 11:37:15,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:15,148 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-10-16 11:37:15,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:15,148 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-10-16 11:37:15,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:15,148 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:15,148 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:15,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-16 11:37:15,359 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:15,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:15,360 INFO L82 PathProgramCache]: Analyzing trace with hash 2130066205, now seen corresponding path program 16 times [2020-10-16 11:37:15,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:15,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273547690] [2020-10-16 11:37:15,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:15,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:15,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:15,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273547690] [2020-10-16 11:37:15,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257339560] [2020-10-16 11:37:15,407 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:15,455 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:37:15,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:15,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:15,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:15,552 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:37:15,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:15,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:15,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:15,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588222356] [2020-10-16 11:37:15,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:15,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:15,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:15,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:15,566 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-10-16 11:37:15,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:15,836 INFO L93 Difference]: Finished difference Result 136 states and 323 transitions. [2020-10-16 11:37:15,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 11:37:15,837 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 11:37:15,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:15,838 INFO L225 Difference]: With dead ends: 136 [2020-10-16 11:37:15,839 INFO L226 Difference]: Without dead ends: 131 [2020-10-16 11:37:15,839 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:37:15,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-16 11:37:15,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2020-10-16 11:37:15,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-16 11:37:15,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-10-16 11:37:15,844 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-10-16 11:37:15,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:15,845 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-10-16 11:37:15,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:15,845 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-10-16 11:37:15,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:15,845 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:15,846 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:16,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:16,046 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:16,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:16,047 INFO L82 PathProgramCache]: Analyzing trace with hash 2130067166, now seen corresponding path program 17 times [2020-10-16 11:37:16,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:16,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859595755] [2020-10-16 11:37:16,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:16,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:16,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:16,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859595755] [2020-10-16 11:37:16,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428007114] [2020-10-16 11:37:16,115 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:16,179 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:16,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:16,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:16,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:16,232 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:37:16,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:16,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:16,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:16,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639626648] [2020-10-16 11:37:16,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:16,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:16,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:16,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:16,241 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-10-16 11:37:16,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:16,544 INFO L93 Difference]: Finished difference Result 138 states and 325 transitions. [2020-10-16 11:37:16,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 11:37:16,545 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 11:37:16,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:16,547 INFO L225 Difference]: With dead ends: 138 [2020-10-16 11:37:16,547 INFO L226 Difference]: Without dead ends: 133 [2020-10-16 11:37:16,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:37:16,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-16 11:37:16,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 99. [2020-10-16 11:37:16,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-16 11:37:16,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-10-16 11:37:16,552 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-10-16 11:37:16,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:16,552 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-10-16 11:37:16,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:16,553 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-10-16 11:37:16,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:16,553 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:16,553 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:16,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:16,764 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:16,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:16,765 INFO L82 PathProgramCache]: Analyzing trace with hash 2130095996, now seen corresponding path program 18 times [2020-10-16 11:37:16,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:16,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123357871] [2020-10-16 11:37:16,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:16,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:16,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:16,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123357871] [2020-10-16 11:37:16,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450865408] [2020-10-16 11:37:16,815 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:16,854 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:37:16,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:16,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:16,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:16,912 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:37:16,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:16,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:16,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:16,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658951677] [2020-10-16 11:37:16,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:16,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:16,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:16,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:16,922 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-10-16 11:37:17,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:17,185 INFO L93 Difference]: Finished difference Result 136 states and 319 transitions. [2020-10-16 11:37:17,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:37:17,186 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 11:37:17,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:17,187 INFO L225 Difference]: With dead ends: 136 [2020-10-16 11:37:17,188 INFO L226 Difference]: Without dead ends: 131 [2020-10-16 11:37:17,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:37:17,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-16 11:37:17,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 98. [2020-10-16 11:37:17,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-16 11:37:17,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 231 transitions. [2020-10-16 11:37:17,194 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 231 transitions. Word has length 11 [2020-10-16 11:37:17,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:17,194 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 231 transitions. [2020-10-16 11:37:17,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:17,194 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 231 transitions. [2020-10-16 11:37:17,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:17,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:17,195 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:17,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:17,396 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:17,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:17,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1822274800, now seen corresponding path program 4 times [2020-10-16 11:37:17,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:17,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853882744] [2020-10-16 11:37:17,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:17,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:17,468 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:17,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853882744] [2020-10-16 11:37:17,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193796915] [2020-10-16 11:37:17,469 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:17,512 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:37:17,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:17,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:17,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:17,585 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:37:17,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:17,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:17,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-10-16 11:37:17,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678751174] [2020-10-16 11:37:17,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 11:37:17,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:17,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 11:37:17,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:37:17,612 INFO L87 Difference]: Start difference. First operand 98 states and 231 transitions. Second operand 14 states. [2020-10-16 11:37:17,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:17,738 INFO L93 Difference]: Finished difference Result 143 states and 333 transitions. [2020-10-16 11:37:17,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:37:17,739 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-10-16 11:37:17,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:17,740 INFO L225 Difference]: With dead ends: 143 [2020-10-16 11:37:17,740 INFO L226 Difference]: Without dead ends: 138 [2020-10-16 11:37:17,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:37:17,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-16 11:37:17,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 105. [2020-10-16 11:37:17,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-16 11:37:17,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 257 transitions. [2020-10-16 11:37:17,745 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 257 transitions. Word has length 11 [2020-10-16 11:37:17,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:17,746 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 257 transitions. [2020-10-16 11:37:17,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 11:37:17,746 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 257 transitions. [2020-10-16 11:37:17,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:17,746 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:17,747 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:17,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-10-16 11:37:17,948 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:17,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:17,948 INFO L82 PathProgramCache]: Analyzing trace with hash 62604888, now seen corresponding path program 10 times [2020-10-16 11:37:17,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:17,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984059554] [2020-10-16 11:37:17,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:17,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:18,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:18,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984059554] [2020-10-16 11:37:18,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996659061] [2020-10-16 11:37:18,006 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:18,045 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:37:18,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:18,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:18,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:18,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:18,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:18,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:18,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892942098] [2020-10-16 11:37:18,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:18,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:18,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:18,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:18,160 INFO L87 Difference]: Start difference. First operand 105 states and 257 transitions. Second operand 13 states. [2020-10-16 11:37:18,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:18,256 INFO L93 Difference]: Finished difference Result 134 states and 315 transitions. [2020-10-16 11:37:18,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 11:37:18,257 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-16 11:37:18,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:18,258 INFO L225 Difference]: With dead ends: 134 [2020-10-16 11:37:18,258 INFO L226 Difference]: Without dead ends: 131 [2020-10-16 11:37:18,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:18,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-16 11:37:18,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 110. [2020-10-16 11:37:18,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-16 11:37:18,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-10-16 11:37:18,262 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-10-16 11:37:18,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:18,263 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-10-16 11:37:18,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:18,263 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-10-16 11:37:18,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:18,264 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:18,264 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:18,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:18,464 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:18,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:18,465 INFO L82 PathProgramCache]: Analyzing trace with hash 727540008, now seen corresponding path program 11 times [2020-10-16 11:37:18,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:18,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000812209] [2020-10-16 11:37:18,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:18,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:18,539 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:18,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000812209] [2020-10-16 11:37:18,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145167290] [2020-10-16 11:37:18,540 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:18,586 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:37:18,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:18,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:18,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:18,687 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:18,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:18,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:18,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138281678] [2020-10-16 11:37:18,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:18,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:18,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:18,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:18,688 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-10-16 11:37:18,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:18,837 INFO L93 Difference]: Finished difference Result 145 states and 336 transitions. [2020-10-16 11:37:18,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:37:18,837 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-16 11:37:18,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:18,838 INFO L225 Difference]: With dead ends: 145 [2020-10-16 11:37:18,839 INFO L226 Difference]: Without dead ends: 142 [2020-10-16 11:37:18,839 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:37:18,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-16 11:37:18,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 110. [2020-10-16 11:37:18,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-16 11:37:18,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-10-16 11:37:18,843 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-10-16 11:37:18,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:18,844 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-10-16 11:37:18,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:18,844 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-10-16 11:37:18,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:18,844 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:18,844 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:19,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-16 11:37:19,055 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:19,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:19,055 INFO L82 PathProgramCache]: Analyzing trace with hash 748989528, now seen corresponding path program 12 times [2020-10-16 11:37:19,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:19,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15337060] [2020-10-16 11:37:19,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:19,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:19,111 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:19,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15337060] [2020-10-16 11:37:19,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407242602] [2020-10-16 11:37:19,111 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:19,150 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 11:37:19,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:19,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:19,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:19,237 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:19,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:19,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:19,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256775953] [2020-10-16 11:37:19,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:19,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:19,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:19,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:19,239 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-10-16 11:37:19,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:19,428 INFO L93 Difference]: Finished difference Result 147 states and 342 transitions. [2020-10-16 11:37:19,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 11:37:19,428 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-16 11:37:19,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:19,430 INFO L225 Difference]: With dead ends: 147 [2020-10-16 11:37:19,430 INFO L226 Difference]: Without dead ends: 144 [2020-10-16 11:37:19,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:37:19,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-16 11:37:19,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 112. [2020-10-16 11:37:19,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-16 11:37:19,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 275 transitions. [2020-10-16 11:37:19,436 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 275 transitions. Word has length 11 [2020-10-16 11:37:19,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:19,437 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 275 transitions. [2020-10-16 11:37:19,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:19,437 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 275 transitions. [2020-10-16 11:37:19,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:19,437 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:19,438 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:19,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:19,649 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:19,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:19,650 INFO L82 PathProgramCache]: Analyzing trace with hash 749681448, now seen corresponding path program 13 times [2020-10-16 11:37:19,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:19,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042974190] [2020-10-16 11:37:19,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:19,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:19,718 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:19,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042974190] [2020-10-16 11:37:19,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273291063] [2020-10-16 11:37:19,719 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:19,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:19,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:19,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:19,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:19,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:19,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:19,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698530818] [2020-10-16 11:37:19,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:19,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:19,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:19,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:19,898 INFO L87 Difference]: Start difference. First operand 112 states and 275 transitions. Second operand 13 states. [2020-10-16 11:37:20,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:20,040 INFO L93 Difference]: Finished difference Result 143 states and 336 transitions. [2020-10-16 11:37:20,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:37:20,040 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-16 11:37:20,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:20,041 INFO L225 Difference]: With dead ends: 143 [2020-10-16 11:37:20,042 INFO L226 Difference]: Without dead ends: 140 [2020-10-16 11:37:20,042 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:37:20,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-16 11:37:20,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 114. [2020-10-16 11:37:20,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-16 11:37:20,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 282 transitions. [2020-10-16 11:37:20,046 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 282 transitions. Word has length 11 [2020-10-16 11:37:20,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:20,047 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 282 transitions. [2020-10-16 11:37:20,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:20,047 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 282 transitions. [2020-10-16 11:37:20,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:20,048 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:20,048 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:20,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-16 11:37:20,258 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:20,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:20,258 INFO L82 PathProgramCache]: Analyzing trace with hash 749703768, now seen corresponding path program 14 times [2020-10-16 11:37:20,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:20,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226888436] [2020-10-16 11:37:20,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:20,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:20,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:20,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226888436] [2020-10-16 11:37:20,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719669167] [2020-10-16 11:37:20,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:20,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:20,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:20,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:20,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:20,442 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:37:20,450 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:20,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:20,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:20,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467131330] [2020-10-16 11:37:20,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:20,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:20,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:20,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:20,452 INFO L87 Difference]: Start difference. First operand 114 states and 282 transitions. Second operand 13 states. [2020-10-16 11:37:20,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:20,705 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-10-16 11:37:20,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:37:20,712 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-16 11:37:20,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:20,714 INFO L225 Difference]: With dead ends: 150 [2020-10-16 11:37:20,714 INFO L226 Difference]: Without dead ends: 144 [2020-10-16 11:37:20,714 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:37:20,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-16 11:37:20,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2020-10-16 11:37:20,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-16 11:37:20,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 282 transitions. [2020-10-16 11:37:20,718 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 282 transitions. Word has length 11 [2020-10-16 11:37:20,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:20,718 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 282 transitions. [2020-10-16 11:37:20,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:20,719 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 282 transitions. [2020-10-16 11:37:20,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:20,719 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:20,719 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:20,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:20,929 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:20,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:20,930 INFO L82 PathProgramCache]: Analyzing trace with hash 920465749, now seen corresponding path program 19 times [2020-10-16 11:37:20,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:20,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713967918] [2020-10-16 11:37:20,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:20,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:20,991 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:20,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713967918] [2020-10-16 11:37:20,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442423721] [2020-10-16 11:37:20,992 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:21,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:21,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:21,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:21,129 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:21,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:21,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:21,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498629570] [2020-10-16 11:37:21,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:21,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:21,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:21,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:21,131 INFO L87 Difference]: Start difference. First operand 113 states and 282 transitions. Second operand 13 states. [2020-10-16 11:37:21,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:21,179 INFO L93 Difference]: Finished difference Result 138 states and 332 transitions. [2020-10-16 11:37:21,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 11:37:21,179 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:21,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:21,180 INFO L225 Difference]: With dead ends: 138 [2020-10-16 11:37:21,180 INFO L226 Difference]: Without dead ends: 136 [2020-10-16 11:37:21,181 INFO L677 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 [2020-10-16 11:37:21,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-16 11:37:21,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 117. [2020-10-16 11:37:21,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-16 11:37:21,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 294 transitions. [2020-10-16 11:37:21,185 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 294 transitions. Word has length 12 [2020-10-16 11:37:21,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:21,185 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 294 transitions. [2020-10-16 11:37:21,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:21,185 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 294 transitions. [2020-10-16 11:37:21,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:21,186 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:21,186 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:21,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-16 11:37:21,395 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:21,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:21,396 INFO L82 PathProgramCache]: Analyzing trace with hash 920466710, now seen corresponding path program 20 times [2020-10-16 11:37:21,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:21,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558576302] [2020-10-16 11:37:21,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:21,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:21,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:21,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558576302] [2020-10-16 11:37:21,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201598831] [2020-10-16 11:37:21,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:21,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:21,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:21,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:21,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:21,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:21,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:21,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:21,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076874303] [2020-10-16 11:37:21,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:21,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:21,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:21,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:21,610 INFO L87 Difference]: Start difference. First operand 117 states and 294 transitions. Second operand 13 states. [2020-10-16 11:37:21,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:21,669 INFO L93 Difference]: Finished difference Result 145 states and 346 transitions. [2020-10-16 11:37:21,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 11:37:21,669 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:21,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:21,671 INFO L225 Difference]: With dead ends: 145 [2020-10-16 11:37:21,671 INFO L226 Difference]: Without dead ends: 143 [2020-10-16 11:37:21,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:37:21,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-16 11:37:21,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 115. [2020-10-16 11:37:21,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-16 11:37:21,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 288 transitions. [2020-10-16 11:37:21,675 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 288 transitions. Word has length 12 [2020-10-16 11:37:21,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:21,676 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 288 transitions. [2020-10-16 11:37:21,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:21,676 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 288 transitions. [2020-10-16 11:37:21,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:21,676 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:21,677 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:21,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-16 11:37:21,888 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:21,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:21,888 INFO L82 PathProgramCache]: Analyzing trace with hash 920495540, now seen corresponding path program 21 times [2020-10-16 11:37:21,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:21,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752388808] [2020-10-16 11:37:21,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:21,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:21,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:21,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752388808] [2020-10-16 11:37:21,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282066200] [2020-10-16 11:37:21,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:21,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 11:37:21,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:21,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:21,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:22,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:22,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:22,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:22,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413049634] [2020-10-16 11:37:22,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:22,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:22,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:22,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:22,084 INFO L87 Difference]: Start difference. First operand 115 states and 288 transitions. Second operand 13 states. [2020-10-16 11:37:22,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:22,189 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-10-16 11:37:22,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 11:37:22,189 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:22,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:22,191 INFO L225 Difference]: With dead ends: 150 [2020-10-16 11:37:22,191 INFO L226 Difference]: Without dead ends: 148 [2020-10-16 11:37:22,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:37:22,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-16 11:37:22,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 116. [2020-10-16 11:37:22,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-16 11:37:22,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 289 transitions. [2020-10-16 11:37:22,194 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 289 transitions. Word has length 12 [2020-10-16 11:37:22,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:22,195 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 289 transitions. [2020-10-16 11:37:22,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:22,195 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 289 transitions. [2020-10-16 11:37:22,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:22,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:22,196 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:22,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-16 11:37:22,406 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:22,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:22,406 INFO L82 PathProgramCache]: Analyzing trace with hash 921389270, now seen corresponding path program 22 times [2020-10-16 11:37:22,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:22,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385974219] [2020-10-16 11:37:22,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:22,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:22,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:22,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385974219] [2020-10-16 11:37:22,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725654646] [2020-10-16 11:37:22,470 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:22,505 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:37:22,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:22,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:22,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:22,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:22,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:22,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:22,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130911477] [2020-10-16 11:37:22,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:22,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:22,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:22,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:22,617 INFO L87 Difference]: Start difference. First operand 116 states and 289 transitions. Second operand 13 states. [2020-10-16 11:37:22,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:22,787 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-10-16 11:37:22,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:37:22,788 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:22,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:22,789 INFO L225 Difference]: With dead ends: 150 [2020-10-16 11:37:22,789 INFO L226 Difference]: Without dead ends: 148 [2020-10-16 11:37:22,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:37:22,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-16 11:37:22,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 120. [2020-10-16 11:37:22,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-16 11:37:22,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-10-16 11:37:22,794 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-10-16 11:37:22,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:22,794 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-10-16 11:37:22,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:22,794 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-10-16 11:37:22,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:22,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:22,795 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:23,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-10-16 11:37:23,006 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:23,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:23,006 INFO L82 PathProgramCache]: Analyzing trace with hash 921390231, now seen corresponding path program 23 times [2020-10-16 11:37:23,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:23,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658414668] [2020-10-16 11:37:23,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:23,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:23,069 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:23,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658414668] [2020-10-16 11:37:23,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614924873] [2020-10-16 11:37:23,070 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:23,110 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:23,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:23,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:23,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:23,207 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:23,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:23,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:23,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280119978] [2020-10-16 11:37:23,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:23,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:23,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:23,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:23,208 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-10-16 11:37:23,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:23,350 INFO L93 Difference]: Finished difference Result 147 states and 350 transitions. [2020-10-16 11:37:23,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:37:23,350 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:23,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:23,351 INFO L225 Difference]: With dead ends: 147 [2020-10-16 11:37:23,351 INFO L226 Difference]: Without dead ends: 145 [2020-10-16 11:37:23,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:37:23,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-16 11:37:23,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 118. [2020-10-16 11:37:23,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-16 11:37:23,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 293 transitions. [2020-10-16 11:37:23,356 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 293 transitions. Word has length 12 [2020-10-16 11:37:23,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:23,356 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 293 transitions. [2020-10-16 11:37:23,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:23,356 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 293 transitions. [2020-10-16 11:37:23,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:23,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:23,357 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:23,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:23,566 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:23,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:23,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1557695239, now seen corresponding path program 24 times [2020-10-16 11:37:23,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:23,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073163046] [2020-10-16 11:37:23,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:23,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:23,654 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:23,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073163046] [2020-10-16 11:37:23,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412448252] [2020-10-16 11:37:23,655 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:23,691 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:37:23,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:23,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:23,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:23,786 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:23,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:23,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:23,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292692118] [2020-10-16 11:37:23,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:23,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:23,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:23,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:23,788 INFO L87 Difference]: Start difference. First operand 118 states and 293 transitions. Second operand 13 states. [2020-10-16 11:37:23,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:23,864 INFO L93 Difference]: Finished difference Result 152 states and 360 transitions. [2020-10-16 11:37:23,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 11:37:23,865 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:23,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:23,866 INFO L225 Difference]: With dead ends: 152 [2020-10-16 11:37:23,866 INFO L226 Difference]: Without dead ends: 150 [2020-10-16 11:37:23,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:37:23,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-16 11:37:23,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 122. [2020-10-16 11:37:23,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-16 11:37:23,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 305 transitions. [2020-10-16 11:37:23,871 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 305 transitions. Word has length 12 [2020-10-16 11:37:23,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:23,871 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 305 transitions. [2020-10-16 11:37:23,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:23,871 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 305 transitions. [2020-10-16 11:37:23,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:23,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:23,872 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:24,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-10-16 11:37:24,084 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:24,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:24,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1557696200, now seen corresponding path program 25 times [2020-10-16 11:37:24,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:24,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039830599] [2020-10-16 11:37:24,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:24,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:24,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:24,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039830599] [2020-10-16 11:37:24,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774810218] [2020-10-16 11:37:24,164 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:24,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:24,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:24,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:24,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:24,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:24,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:24,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116463390] [2020-10-16 11:37:24,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:24,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:24,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:24,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:24,307 INFO L87 Difference]: Start difference. First operand 122 states and 305 transitions. Second operand 13 states. [2020-10-16 11:37:24,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:24,390 INFO L93 Difference]: Finished difference Result 153 states and 361 transitions. [2020-10-16 11:37:24,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 11:37:24,391 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:24,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:24,392 INFO L225 Difference]: With dead ends: 153 [2020-10-16 11:37:24,393 INFO L226 Difference]: Without dead ends: 151 [2020-10-16 11:37:24,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:24,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-16 11:37:24,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 120. [2020-10-16 11:37:24,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-16 11:37:24,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-10-16 11:37:24,397 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-10-16 11:37:24,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:24,397 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-10-16 11:37:24,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:24,397 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-10-16 11:37:24,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:24,398 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:24,398 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:24,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-16 11:37:24,601 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:24,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:24,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1557725030, now seen corresponding path program 26 times [2020-10-16 11:37:24,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:24,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698343723] [2020-10-16 11:37:24,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:24,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:24,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:24,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698343723] [2020-10-16 11:37:24,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588091352] [2020-10-16 11:37:24,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:24,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:24,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:24,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:24,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:24,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:24,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:24,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:24,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688165485] [2020-10-16 11:37:24,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:24,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:24,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:24,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:24,794 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-10-16 11:37:24,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:24,920 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-16 11:37:24,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:37:24,920 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:24,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:24,922 INFO L225 Difference]: With dead ends: 156 [2020-10-16 11:37:24,922 INFO L226 Difference]: Without dead ends: 154 [2020-10-16 11:37:24,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:37:24,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-16 11:37:24,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 119. [2020-10-16 11:37:24,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-16 11:37:24,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 295 transitions. [2020-10-16 11:37:24,927 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 295 transitions. Word has length 12 [2020-10-16 11:37:24,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:24,927 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 295 transitions. [2020-10-16 11:37:24,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:24,927 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 295 transitions. [2020-10-16 11:37:24,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:24,928 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:24,928 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:25,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:25,137 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:25,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:25,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1578251029, now seen corresponding path program 27 times [2020-10-16 11:37:25,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:25,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483763497] [2020-10-16 11:37:25,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:25,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:25,217 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:25,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483763497] [2020-10-16 11:37:25,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575384650] [2020-10-16 11:37:25,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:25,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 11:37:25,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:25,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:25,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:25,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:25,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:25,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:25,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497395036] [2020-10-16 11:37:25,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:25,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:25,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:25,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:25,376 INFO L87 Difference]: Start difference. First operand 119 states and 295 transitions. Second operand 13 states. [2020-10-16 11:37:25,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:25,450 INFO L93 Difference]: Finished difference Result 148 states and 351 transitions. [2020-10-16 11:37:25,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 11:37:25,451 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:25,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:25,452 INFO L225 Difference]: With dead ends: 148 [2020-10-16 11:37:25,452 INFO L226 Difference]: Without dead ends: 146 [2020-10-16 11:37:25,453 INFO L677 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 [2020-10-16 11:37:25,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-16 11:37:25,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 121. [2020-10-16 11:37:25,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-16 11:37:25,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-10-16 11:37:25,460 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-10-16 11:37:25,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:25,460 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-10-16 11:37:25,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:25,460 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-10-16 11:37:25,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:25,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:25,461 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:25,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-16 11:37:25,672 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:25,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:25,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1578251990, now seen corresponding path program 28 times [2020-10-16 11:37:25,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:25,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810133854] [2020-10-16 11:37:25,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:25,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:25,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:25,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810133854] [2020-10-16 11:37:25,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150772566] [2020-10-16 11:37:25,743 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:25,779 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:37:25,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:25,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:25,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:25,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:25,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:25,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:25,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768272944] [2020-10-16 11:37:25,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:25,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:25,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:25,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:25,875 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-10-16 11:37:25,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:25,977 INFO L93 Difference]: Finished difference Result 149 states and 352 transitions. [2020-10-16 11:37:25,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:37:25,978 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:25,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:25,979 INFO L225 Difference]: With dead ends: 149 [2020-10-16 11:37:25,979 INFO L226 Difference]: Without dead ends: 147 [2020-10-16 11:37:25,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:37:25,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-16 11:37:25,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 120. [2020-10-16 11:37:25,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-16 11:37:25,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 297 transitions. [2020-10-16 11:37:25,983 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 297 transitions. Word has length 12 [2020-10-16 11:37:25,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:25,983 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 297 transitions. [2020-10-16 11:37:25,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:25,983 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 297 transitions. [2020-10-16 11:37:25,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:25,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:25,984 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:26,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:26,193 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:26,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:26,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1578914119, now seen corresponding path program 29 times [2020-10-16 11:37:26,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:26,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644559797] [2020-10-16 11:37:26,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:26,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:26,259 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:26,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644559797] [2020-10-16 11:37:26,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568131592] [2020-10-16 11:37:26,260 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:26,300 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:26,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:26,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:26,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:26,394 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:26,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:26,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:26,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648714800] [2020-10-16 11:37:26,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:26,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:26,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:26,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:26,396 INFO L87 Difference]: Start difference. First operand 120 states and 297 transitions. Second operand 13 states. [2020-10-16 11:37:26,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:26,492 INFO L93 Difference]: Finished difference Result 149 states and 350 transitions. [2020-10-16 11:37:26,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:37:26,492 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:26,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:26,493 INFO L225 Difference]: With dead ends: 149 [2020-10-16 11:37:26,493 INFO L226 Difference]: Without dead ends: 147 [2020-10-16 11:37:26,494 INFO L677 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 [2020-10-16 11:37:26,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-16 11:37:26,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 124. [2020-10-16 11:37:26,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-16 11:37:26,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-16 11:37:26,497 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-16 11:37:26,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:26,498 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-16 11:37:26,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:26,498 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-16 11:37:26,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:26,498 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:26,499 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:26,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-10-16 11:37:26,708 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:26,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:26,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1578936439, now seen corresponding path program 30 times [2020-10-16 11:37:26,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:26,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126964035] [2020-10-16 11:37:26,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:26,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:26,767 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:26,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126964035] [2020-10-16 11:37:26,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825355084] [2020-10-16 11:37:26,767 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:26,805 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:37:26,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:26,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:37:26,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:26,832 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:26,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:26,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-16 11:37:26,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166269494] [2020-10-16 11:37:26,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 11:37:26,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:26,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 11:37:26,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-10-16 11:37:26,834 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 9 states. [2020-10-16 11:37:26,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:26,966 INFO L93 Difference]: Finished difference Result 164 states and 389 transitions. [2020-10-16 11:37:26,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:37:26,966 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-16 11:37:26,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:26,967 INFO L225 Difference]: With dead ends: 164 [2020-10-16 11:37:26,968 INFO L226 Difference]: Without dead ends: 159 [2020-10-16 11:37:26,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:37:26,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-16 11:37:26,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-10-16 11:37:26,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-16 11:37:26,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 296 transitions. [2020-10-16 11:37:26,971 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 296 transitions. Word has length 12 [2020-10-16 11:37:26,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:26,971 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 296 transitions. [2020-10-16 11:37:26,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 11:37:26,971 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 296 transitions. [2020-10-16 11:37:26,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:26,972 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:26,972 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:27,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-16 11:37:27,175 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:27,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:27,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1578943910, now seen corresponding path program 31 times [2020-10-16 11:37:27,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:27,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366351863] [2020-10-16 11:37:27,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:27,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:27,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:27,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366351863] [2020-10-16 11:37:27,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009028920] [2020-10-16 11:37:27,231 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:27,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:27,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:27,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:27,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:27,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:27,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:27,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952271527] [2020-10-16 11:37:27,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:27,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:27,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:27,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:27,375 INFO L87 Difference]: Start difference. First operand 122 states and 296 transitions. Second operand 13 states. [2020-10-16 11:37:27,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:27,573 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-16 11:37:27,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:37:27,574 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:27,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:27,575 INFO L225 Difference]: With dead ends: 156 [2020-10-16 11:37:27,576 INFO L226 Difference]: Without dead ends: 154 [2020-10-16 11:37:27,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:37:27,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-16 11:37:27,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 124. [2020-10-16 11:37:27,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-16 11:37:27,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-16 11:37:27,579 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-16 11:37:27,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:27,580 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-16 11:37:27,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:27,580 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-16 11:37:27,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:27,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:27,581 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:27,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-16 11:37:27,785 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:27,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:27,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1578965269, now seen corresponding path program 32 times [2020-10-16 11:37:27,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:27,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231548591] [2020-10-16 11:37:27,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:27,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:27,850 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:27,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231548591] [2020-10-16 11:37:27,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003878245] [2020-10-16 11:37:27,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:27,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:27,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:27,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:27,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:27,998 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:37:28,035 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:28,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:28,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:28,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468075049] [2020-10-16 11:37:28,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:28,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:28,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:28,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:28,036 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-16 11:37:28,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:28,396 INFO L93 Difference]: Finished difference Result 176 states and 416 transitions. [2020-10-16 11:37:28,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 11:37:28,397 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:28,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:28,399 INFO L225 Difference]: With dead ends: 176 [2020-10-16 11:37:28,399 INFO L226 Difference]: Without dead ends: 171 [2020-10-16 11:37:28,399 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:37:28,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-16 11:37:28,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 124. [2020-10-16 11:37:28,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-16 11:37:28,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-16 11:37:28,403 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-16 11:37:28,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:28,403 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-16 11:37:28,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:28,403 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-16 11:37:28,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:28,404 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:28,404 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:28,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-10-16 11:37:28,605 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:28,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:28,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1578966230, now seen corresponding path program 33 times [2020-10-16 11:37:28,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:28,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663259668] [2020-10-16 11:37:28,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:28,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:28,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:28,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663259668] [2020-10-16 11:37:28,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71745685] [2020-10-16 11:37:28,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:28,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 11:37:28,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:28,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:28,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:28,778 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:37:28,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:28,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:28,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:28,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418970176] [2020-10-16 11:37:28,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:28,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:28,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:28,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:28,804 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-16 11:37:29,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:29,074 INFO L93 Difference]: Finished difference Result 166 states and 393 transitions. [2020-10-16 11:37:29,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:37:29,075 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:29,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:29,076 INFO L225 Difference]: With dead ends: 166 [2020-10-16 11:37:29,076 INFO L226 Difference]: Without dead ends: 161 [2020-10-16 11:37:29,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=308, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:37:29,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-16 11:37:29,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 121. [2020-10-16 11:37:29,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-16 11:37:29,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 294 transitions. [2020-10-16 11:37:29,080 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 294 transitions. Word has length 12 [2020-10-16 11:37:29,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:29,080 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 294 transitions. [2020-10-16 11:37:29,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:29,081 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 294 transitions. [2020-10-16 11:37:29,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:29,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:29,081 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:29,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:29,292 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:29,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:29,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1579174550, now seen corresponding path program 34 times [2020-10-16 11:37:29,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:29,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603507586] [2020-10-16 11:37:29,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:29,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:29,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:29,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603507586] [2020-10-16 11:37:29,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414590768] [2020-10-16 11:37:29,348 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:29,392 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:37:29,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:29,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:29,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:29,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:29,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:29,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:29,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295068246] [2020-10-16 11:37:29,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:29,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:29,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:29,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:29,520 INFO L87 Difference]: Start difference. First operand 121 states and 294 transitions. Second operand 13 states. [2020-10-16 11:37:29,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:29,698 INFO L93 Difference]: Finished difference Result 163 states and 379 transitions. [2020-10-16 11:37:29,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:37:29,698 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:29,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:29,700 INFO L225 Difference]: With dead ends: 163 [2020-10-16 11:37:29,700 INFO L226 Difference]: Without dead ends: 161 [2020-10-16 11:37:29,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:37:29,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-16 11:37:29,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 123. [2020-10-16 11:37:29,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-16 11:37:29,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 301 transitions. [2020-10-16 11:37:29,704 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 301 transitions. Word has length 12 [2020-10-16 11:37:29,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:29,704 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 301 transitions. [2020-10-16 11:37:29,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:29,704 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 301 transitions. [2020-10-16 11:37:29,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:29,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:29,705 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:29,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2020-10-16 11:37:29,913 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:29,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:29,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1579837640, now seen corresponding path program 35 times [2020-10-16 11:37:29,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:29,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135876650] [2020-10-16 11:37:29,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:29,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:29,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:29,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135876650] [2020-10-16 11:37:29,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102871127] [2020-10-16 11:37:29,970 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:30,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:30,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:30,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:30,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:30,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:30,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:30,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:30,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779646370] [2020-10-16 11:37:30,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:30,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:30,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:30,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:30,103 INFO L87 Difference]: Start difference. First operand 123 states and 301 transitions. Second operand 13 states. [2020-10-16 11:37:30,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:30,414 INFO L93 Difference]: Finished difference Result 170 states and 399 transitions. [2020-10-16 11:37:30,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:37:30,415 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:30,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:30,416 INFO L225 Difference]: With dead ends: 170 [2020-10-16 11:37:30,416 INFO L226 Difference]: Without dead ends: 168 [2020-10-16 11:37:30,417 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=160, Invalid=346, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:37:30,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-16 11:37:30,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 125. [2020-10-16 11:37:30,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-16 11:37:30,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 308 transitions. [2020-10-16 11:37:30,421 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 308 transitions. Word has length 12 [2020-10-16 11:37:30,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:30,421 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 308 transitions. [2020-10-16 11:37:30,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:30,421 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 308 transitions. [2020-10-16 11:37:30,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:30,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:30,422 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:30,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:30,631 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:30,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:30,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1579858999, now seen corresponding path program 36 times [2020-10-16 11:37:30,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:30,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895406361] [2020-10-16 11:37:30,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:30,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:30,690 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:30,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895406361] [2020-10-16 11:37:30,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653540494] [2020-10-16 11:37:30,691 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:30,754 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:37:30,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:30,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:30,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:30,852 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:37:30,864 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:30,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:30,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:30,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540774398] [2020-10-16 11:37:30,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:30,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:30,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:30,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:30,866 INFO L87 Difference]: Start difference. First operand 125 states and 308 transitions. Second operand 13 states. [2020-10-16 11:37:31,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:31,195 INFO L93 Difference]: Finished difference Result 177 states and 424 transitions. [2020-10-16 11:37:31,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 11:37:31,195 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:31,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:31,196 INFO L225 Difference]: With dead ends: 177 [2020-10-16 11:37:31,197 INFO L226 Difference]: Without dead ends: 172 [2020-10-16 11:37:31,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=471, Unknown=0, NotChecked=0, Total=702 [2020-10-16 11:37:31,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-16 11:37:31,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 126. [2020-10-16 11:37:31,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-16 11:37:31,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 313 transitions. [2020-10-16 11:37:31,200 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 313 transitions. Word has length 12 [2020-10-16 11:37:31,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:31,201 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 313 transitions. [2020-10-16 11:37:31,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:31,201 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 313 transitions. [2020-10-16 11:37:31,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:31,202 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:31,202 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:31,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-10-16 11:37:31,411 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:31,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:31,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1579859960, now seen corresponding path program 37 times [2020-10-16 11:37:31,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:31,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154681012] [2020-10-16 11:37:31,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:31,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:31,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:31,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154681012] [2020-10-16 11:37:31,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591263996] [2020-10-16 11:37:31,467 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:31,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:31,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:31,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:31,570 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:37:31,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:31,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:31,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:31,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819757686] [2020-10-16 11:37:31,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:31,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:31,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:31,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:31,587 INFO L87 Difference]: Start difference. First operand 126 states and 313 transitions. Second operand 13 states. [2020-10-16 11:37:31,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:31,966 INFO L93 Difference]: Finished difference Result 190 states and 454 transitions. [2020-10-16 11:37:31,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 11:37:31,966 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:31,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:31,968 INFO L225 Difference]: With dead ends: 190 [2020-10-16 11:37:31,968 INFO L226 Difference]: Without dead ends: 182 [2020-10-16 11:37:31,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=239, Invalid=517, Unknown=0, NotChecked=0, Total=756 [2020-10-16 11:37:31,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-16 11:37:31,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 121. [2020-10-16 11:37:31,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-16 11:37:31,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 297 transitions. [2020-10-16 11:37:31,972 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 297 transitions. Word has length 12 [2020-10-16 11:37:31,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:31,973 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 297 transitions. [2020-10-16 11:37:31,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:31,973 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 297 transitions. [2020-10-16 11:37:31,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:31,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:31,973 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:32,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-10-16 11:37:32,186 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:32,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:32,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1579888790, now seen corresponding path program 38 times [2020-10-16 11:37:32,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:32,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017393778] [2020-10-16 11:37:32,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:32,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:32,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:32,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017393778] [2020-10-16 11:37:32,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515619150] [2020-10-16 11:37:32,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:32,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:32,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:32,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:32,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:32,351 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:37:32,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:32,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:32,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:32,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114324949] [2020-10-16 11:37:32,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:32,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:32,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:32,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:32,362 INFO L87 Difference]: Start difference. First operand 121 states and 297 transitions. Second operand 13 states. [2020-10-16 11:37:32,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:32,725 INFO L93 Difference]: Finished difference Result 180 states and 427 transitions. [2020-10-16 11:37:32,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 11:37:32,726 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:32,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:32,727 INFO L225 Difference]: With dead ends: 180 [2020-10-16 11:37:32,727 INFO L226 Difference]: Without dead ends: 175 [2020-10-16 11:37:32,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=208, Invalid=442, Unknown=0, NotChecked=0, Total=650 [2020-10-16 11:37:32,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-16 11:37:32,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 120. [2020-10-16 11:37:32,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-16 11:37:32,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 292 transitions. [2020-10-16 11:37:32,730 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 292 transitions. Word has length 12 [2020-10-16 11:37:32,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:32,730 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 292 transitions. [2020-10-16 11:37:32,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:32,731 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 292 transitions. [2020-10-16 11:37:32,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:32,731 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:32,731 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:32,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:32,936 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:32,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:32,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1586324390, now seen corresponding path program 39 times [2020-10-16 11:37:32,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:32,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111308778] [2020-10-16 11:37:32,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:32,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:32,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:32,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111308778] [2020-10-16 11:37:32,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616704190] [2020-10-16 11:37:32,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:33,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 11:37:33,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:33,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:33,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:33,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:33,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:33,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:33,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181057267] [2020-10-16 11:37:33,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:33,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:33,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:33,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:33,195 INFO L87 Difference]: Start difference. First operand 120 states and 292 transitions. Second operand 13 states. [2020-10-16 11:37:33,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:33,404 INFO L93 Difference]: Finished difference Result 164 states and 379 transitions. [2020-10-16 11:37:33,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:37:33,405 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:33,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:33,406 INFO L225 Difference]: With dead ends: 164 [2020-10-16 11:37:33,406 INFO L226 Difference]: Without dead ends: 162 [2020-10-16 11:37:33,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:37:33,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-16 11:37:33,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 121. [2020-10-16 11:37:33,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-16 11:37:33,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 295 transitions. [2020-10-16 11:37:33,409 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 295 transitions. Word has length 12 [2020-10-16 11:37:33,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:33,410 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 295 transitions. [2020-10-16 11:37:33,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:33,410 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 295 transitions. [2020-10-16 11:37:33,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:33,410 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:33,410 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:33,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-10-16 11:37:33,611 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:33,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:33,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1586325351, now seen corresponding path program 40 times [2020-10-16 11:37:33,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:33,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411802554] [2020-10-16 11:37:33,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:33,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:33,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:33,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411802554] [2020-10-16 11:37:33,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642931149] [2020-10-16 11:37:33,668 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:33,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:37:33,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:33,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:33,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:33,795 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:33,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:33,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:33,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20466940] [2020-10-16 11:37:33,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:33,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:33,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:33,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:33,797 INFO L87 Difference]: Start difference. First operand 121 states and 295 transitions. Second operand 13 states. [2020-10-16 11:37:33,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:33,984 INFO L93 Difference]: Finished difference Result 159 states and 368 transitions. [2020-10-16 11:37:33,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 11:37:33,984 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:33,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:33,986 INFO L225 Difference]: With dead ends: 159 [2020-10-16 11:37:33,986 INFO L226 Difference]: Without dead ends: 157 [2020-10-16 11:37:33,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:37:33,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-16 11:37:33,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 118. [2020-10-16 11:37:33,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-16 11:37:33,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 287 transitions. [2020-10-16 11:37:33,989 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 287 transitions. Word has length 12 [2020-10-16 11:37:33,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:33,989 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 287 transitions. [2020-10-16 11:37:33,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:33,990 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 287 transitions. [2020-10-16 11:37:33,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:33,990 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:33,990 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:34,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-10-16 11:37:34,191 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:34,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:34,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1606880180, now seen corresponding path program 41 times [2020-10-16 11:37:34,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:34,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276159237] [2020-10-16 11:37:34,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:34,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:34,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:34,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276159237] [2020-10-16 11:37:34,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903763800] [2020-10-16 11:37:34,247 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:34,292 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:37:34,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:34,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:34,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:34,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:34,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:34,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:34,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959236294] [2020-10-16 11:37:34,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:34,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:34,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:34,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:34,424 INFO L87 Difference]: Start difference. First operand 118 states and 287 transitions. Second operand 13 states. [2020-10-16 11:37:34,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:34,866 INFO L93 Difference]: Finished difference Result 175 states and 403 transitions. [2020-10-16 11:37:34,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 11:37:34,867 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:34,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:34,868 INFO L225 Difference]: With dead ends: 175 [2020-10-16 11:37:34,868 INFO L226 Difference]: Without dead ends: 173 [2020-10-16 11:37:34,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=452, Unknown=0, NotChecked=0, Total=650 [2020-10-16 11:37:34,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-16 11:37:34,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 118. [2020-10-16 11:37:34,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-16 11:37:34,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 290 transitions. [2020-10-16 11:37:34,874 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 290 transitions. Word has length 12 [2020-10-16 11:37:34,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:34,874 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 290 transitions. [2020-10-16 11:37:34,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:34,875 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 290 transitions. [2020-10-16 11:37:34,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:34,875 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:34,876 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:35,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-10-16 11:37:35,076 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:35,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:35,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1606881141, now seen corresponding path program 42 times [2020-10-16 11:37:35,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:35,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811231118] [2020-10-16 11:37:35,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:35,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:35,127 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:35,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811231118] [2020-10-16 11:37:35,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651958935] [2020-10-16 11:37:35,128 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:35,176 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:37:35,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:35,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:35,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:35,261 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:35,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:35,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:35,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350479922] [2020-10-16 11:37:35,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:35,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:35,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:35,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:35,263 INFO L87 Difference]: Start difference. First operand 118 states and 290 transitions. Second operand 13 states. [2020-10-16 11:37:35,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:35,560 INFO L93 Difference]: Finished difference Result 162 states and 374 transitions. [2020-10-16 11:37:35,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 11:37:35,560 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:35,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:35,562 INFO L225 Difference]: With dead ends: 162 [2020-10-16 11:37:35,562 INFO L226 Difference]: Without dead ends: 160 [2020-10-16 11:37:35,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:37:35,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-16 11:37:35,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 118. [2020-10-16 11:37:35,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-16 11:37:35,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-10-16 11:37:35,566 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-10-16 11:37:35,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:35,566 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-10-16 11:37:35,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:35,567 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-10-16 11:37:35,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:35,567 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:35,567 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:35,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:35,770 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:35,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:35,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1607543270, now seen corresponding path program 43 times [2020-10-16 11:37:35,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:35,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80003021] [2020-10-16 11:37:35,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:35,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:35,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:35,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80003021] [2020-10-16 11:37:35,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284541902] [2020-10-16 11:37:35,832 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:35,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:35,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:35,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:35,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:35,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:35,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:35,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011329086] [2020-10-16 11:37:35,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:35,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:35,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:35,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:35,973 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-10-16 11:37:36,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:36,376 INFO L93 Difference]: Finished difference Result 171 states and 400 transitions. [2020-10-16 11:37:36,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 11:37:36,377 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:36,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:36,378 INFO L225 Difference]: With dead ends: 171 [2020-10-16 11:37:36,378 INFO L226 Difference]: Without dead ends: 169 [2020-10-16 11:37:36,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2020-10-16 11:37:36,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-16 11:37:36,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 120. [2020-10-16 11:37:36,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-16 11:37:36,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-10-16 11:37:36,382 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-10-16 11:37:36,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:36,382 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-10-16 11:37:36,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:36,382 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-10-16 11:37:36,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:36,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:36,383 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:36,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:36,588 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:36,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:36,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1607564629, now seen corresponding path program 44 times [2020-10-16 11:37:36,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:36,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325533674] [2020-10-16 11:37:36,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:36,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:36,644 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:36,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325533674] [2020-10-16 11:37:36,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410191066] [2020-10-16 11:37:36,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:36,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:36,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:36,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:36,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:36,758 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:37:36,772 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:36,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:36,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:36,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749179052] [2020-10-16 11:37:36,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:36,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:36,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:36,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:36,775 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-10-16 11:37:37,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:37,114 INFO L93 Difference]: Finished difference Result 165 states and 396 transitions. [2020-10-16 11:37:37,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 11:37:37,115 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:37,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:37,116 INFO L225 Difference]: With dead ends: 165 [2020-10-16 11:37:37,116 INFO L226 Difference]: Without dead ends: 160 [2020-10-16 11:37:37,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=265, Invalid=547, Unknown=0, NotChecked=0, Total=812 [2020-10-16 11:37:37,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-16 11:37:37,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 121. [2020-10-16 11:37:37,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-16 11:37:37,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-10-16 11:37:37,121 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-10-16 11:37:37,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:37,121 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-10-16 11:37:37,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:37,121 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-10-16 11:37:37,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:37,122 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:37,122 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:37,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:37,323 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:37,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:37,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1607565590, now seen corresponding path program 45 times [2020-10-16 11:37:37,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:37,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44571237] [2020-10-16 11:37:37,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:37,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:37,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:37,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44571237] [2020-10-16 11:37:37,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697957386] [2020-10-16 11:37:37,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:37,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 11:37:37,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:37,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:37,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:37,496 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:37:37,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:37,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:37,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:37,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183296086] [2020-10-16 11:37:37,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:37,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:37,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:37,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:37,527 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-10-16 11:37:38,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:38,055 INFO L93 Difference]: Finished difference Result 194 states and 461 transitions. [2020-10-16 11:37:38,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 11:37:38,055 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:38,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:38,056 INFO L225 Difference]: With dead ends: 194 [2020-10-16 11:37:38,056 INFO L226 Difference]: Without dead ends: 186 [2020-10-16 11:37:38,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=297, Invalid=695, Unknown=0, NotChecked=0, Total=992 [2020-10-16 11:37:38,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-16 11:37:38,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 118. [2020-10-16 11:37:38,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-16 11:37:38,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-10-16 11:37:38,060 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-10-16 11:37:38,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:38,060 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-10-16 11:37:38,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:38,061 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-10-16 11:37:38,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:38,061 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:38,061 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:38,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:38,265 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:38,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:38,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1607573061, now seen corresponding path program 46 times [2020-10-16 11:37:38,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:38,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439541956] [2020-10-16 11:37:38,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:38,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:38,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:38,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439541956] [2020-10-16 11:37:38,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796792995] [2020-10-16 11:37:38,322 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:38,362 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:37:38,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:38,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:38,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:38,449 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:38,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:38,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:38,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710103066] [2020-10-16 11:37:38,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:38,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:38,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:38,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:38,451 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-10-16 11:37:38,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:38,808 INFO L93 Difference]: Finished difference Result 168 states and 393 transitions. [2020-10-16 11:37:38,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 11:37:38,809 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:38,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:38,810 INFO L225 Difference]: With dead ends: 168 [2020-10-16 11:37:38,810 INFO L226 Difference]: Without dead ends: 166 [2020-10-16 11:37:38,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2020-10-16 11:37:38,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-16 11:37:38,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 120. [2020-10-16 11:37:38,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-16 11:37:38,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-10-16 11:37:38,815 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-10-16 11:37:38,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:38,815 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-10-16 11:37:38,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:38,815 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-10-16 11:37:38,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:38,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:38,816 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:39,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-10-16 11:37:39,022 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:39,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:39,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1607594420, now seen corresponding path program 47 times [2020-10-16 11:37:39,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:39,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852986864] [2020-10-16 11:37:39,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:39,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:39,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:39,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852986864] [2020-10-16 11:37:39,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975725672] [2020-10-16 11:37:39,080 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:39,121 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:39,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:39,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:39,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:39,193 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:37:39,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:39,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:39,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:39,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649525497] [2020-10-16 11:37:39,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:39,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:39,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:39,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:39,206 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-10-16 11:37:39,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:39,669 INFO L93 Difference]: Finished difference Result 181 states and 430 transitions. [2020-10-16 11:37:39,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 11:37:39,669 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:39,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:39,671 INFO L225 Difference]: With dead ends: 181 [2020-10-16 11:37:39,671 INFO L226 Difference]: Without dead ends: 173 [2020-10-16 11:37:39,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=285, Invalid=645, Unknown=0, NotChecked=0, Total=930 [2020-10-16 11:37:39,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-16 11:37:39,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 119. [2020-10-16 11:37:39,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-16 11:37:39,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 287 transitions. [2020-10-16 11:37:39,674 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 287 transitions. Word has length 12 [2020-10-16 11:37:39,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:39,674 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 287 transitions. [2020-10-16 11:37:39,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:39,674 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 287 transitions. [2020-10-16 11:37:39,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:39,675 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:39,675 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:39,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:39,885 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:39,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:39,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1607595381, now seen corresponding path program 48 times [2020-10-16 11:37:39,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:39,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442813384] [2020-10-16 11:37:39,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:39,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:39,942 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:39,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442813384] [2020-10-16 11:37:39,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499305840] [2020-10-16 11:37:39,943 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:39,982 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:37:39,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:39,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:39,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:40,043 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:37:40,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:40,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:40,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:40,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193240616] [2020-10-16 11:37:40,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:40,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:40,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:40,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:40,054 INFO L87 Difference]: Start difference. First operand 119 states and 287 transitions. Second operand 13 states. [2020-10-16 11:37:40,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:40,541 INFO L93 Difference]: Finished difference Result 171 states and 400 transitions. [2020-10-16 11:37:40,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 11:37:40,542 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:40,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:40,543 INFO L225 Difference]: With dead ends: 171 [2020-10-16 11:37:40,543 INFO L226 Difference]: Without dead ends: 166 [2020-10-16 11:37:40,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=281, Invalid=649, Unknown=0, NotChecked=0, Total=930 [2020-10-16 11:37:40,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-16 11:37:40,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 114. [2020-10-16 11:37:40,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-16 11:37:40,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 268 transitions. [2020-10-16 11:37:40,547 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 268 transitions. Word has length 12 [2020-10-16 11:37:40,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:40,548 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 268 transitions. [2020-10-16 11:37:40,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:40,548 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 268 transitions. [2020-10-16 11:37:40,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:40,548 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:40,548 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:40,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-10-16 11:37:40,749 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:40,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:40,750 INFO L82 PathProgramCache]: Analyzing trace with hash -655922238, now seen corresponding path program 5 times [2020-10-16 11:37:40,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:40,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878005753] [2020-10-16 11:37:40,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:40,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:40,832 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:40,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878005753] [2020-10-16 11:37:40,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613554226] [2020-10-16 11:37:40,833 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:40,872 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:37:40,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:40,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:40,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:40,999 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:37:41,020 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:41,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:41,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-16 11:37:41,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385360161] [2020-10-16 11:37:41,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 11:37:41,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:41,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 11:37:41,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:37:41,022 INFO L87 Difference]: Start difference. First operand 114 states and 268 transitions. Second operand 16 states. [2020-10-16 11:37:41,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:41,168 INFO L93 Difference]: Finished difference Result 164 states and 382 transitions. [2020-10-16 11:37:41,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:37:41,169 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2020-10-16 11:37:41,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:41,170 INFO L225 Difference]: With dead ends: 164 [2020-10-16 11:37:41,170 INFO L226 Difference]: Without dead ends: 159 [2020-10-16 11:37:41,170 INFO L677 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 [2020-10-16 11:37:41,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-16 11:37:41,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-10-16 11:37:41,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-16 11:37:41,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 299 transitions. [2020-10-16 11:37:41,172 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 299 transitions. Word has length 12 [2020-10-16 11:37:41,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:41,172 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 299 transitions. [2020-10-16 11:37:41,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 11:37:41,172 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 299 transitions. [2020-10-16 11:37:41,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:41,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:41,173 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:41,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:41,376 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:41,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:41,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1940751883, now seen corresponding path program 15 times [2020-10-16 11:37:41,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:41,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252052394] [2020-10-16 11:37:41,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:41,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:41,446 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:41,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252052394] [2020-10-16 11:37:41,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391477552] [2020-10-16 11:37:41,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:41,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 11:37:41,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:41,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:41,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:41,595 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:41,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:41,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:41,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275972038] [2020-10-16 11:37:41,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:41,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:41,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:41,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:41,597 INFO L87 Difference]: Start difference. First operand 122 states and 299 transitions. Second operand 15 states. [2020-10-16 11:37:41,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:41,758 INFO L93 Difference]: Finished difference Result 158 states and 371 transitions. [2020-10-16 11:37:41,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:37:41,758 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-16 11:37:41,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:41,760 INFO L225 Difference]: With dead ends: 158 [2020-10-16 11:37:41,760 INFO L226 Difference]: Without dead ends: 155 [2020-10-16 11:37:41,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:37:41,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-16 11:37:41,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 129. [2020-10-16 11:37:41,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-16 11:37:41,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-10-16 11:37:41,763 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-10-16 11:37:41,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:41,763 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-10-16 11:37:41,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:41,763 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-10-16 11:37:41,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:41,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:41,764 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:41,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-10-16 11:37:41,973 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:41,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:41,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1078904123, now seen corresponding path program 16 times [2020-10-16 11:37:41,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:41,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326936936] [2020-10-16 11:37:41,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:41,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:42,043 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:42,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326936936] [2020-10-16 11:37:42,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006461192] [2020-10-16 11:37:42,044 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:42,092 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:37:42,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:42,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:42,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:42,224 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:42,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:42,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:42,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060448258] [2020-10-16 11:37:42,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:42,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:42,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:42,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:42,226 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-10-16 11:37:42,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:42,444 INFO L93 Difference]: Finished difference Result 172 states and 398 transitions. [2020-10-16 11:37:42,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:37:42,445 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-16 11:37:42,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:42,446 INFO L225 Difference]: With dead ends: 172 [2020-10-16 11:37:42,446 INFO L226 Difference]: Without dead ends: 169 [2020-10-16 11:37:42,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:37:42,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-16 11:37:42,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 129. [2020-10-16 11:37:42,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-16 11:37:42,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-10-16 11:37:42,449 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-10-16 11:37:42,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:42,450 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-10-16 11:37:42,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:42,450 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-10-16 11:37:42,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:42,450 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:42,450 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:42,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:42,655 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:42,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:42,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1743839243, now seen corresponding path program 17 times [2020-10-16 11:37:42,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:42,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622449951] [2020-10-16 11:37:42,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:42,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:42,725 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:42,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622449951] [2020-10-16 11:37:42,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903922039] [2020-10-16 11:37:42,726 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:42,764 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:37:42,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:42,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:42,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:42,890 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:42,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:42,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:42,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612341049] [2020-10-16 11:37:42,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:42,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:42,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:42,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:42,892 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-10-16 11:37:43,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:43,157 INFO L93 Difference]: Finished difference Result 177 states and 410 transitions. [2020-10-16 11:37:43,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 11:37:43,158 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-16 11:37:43,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:43,160 INFO L225 Difference]: With dead ends: 177 [2020-10-16 11:37:43,160 INFO L226 Difference]: Without dead ends: 174 [2020-10-16 11:37:43,160 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:37:43,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-16 11:37:43,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 130. [2020-10-16 11:37:43,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-16 11:37:43,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 320 transitions. [2020-10-16 11:37:43,164 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 320 transitions. Word has length 12 [2020-10-16 11:37:43,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:43,164 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 320 transitions. [2020-10-16 11:37:43,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:43,164 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 320 transitions. [2020-10-16 11:37:43,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:43,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:43,165 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:43,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:43,374 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:43,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:43,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1765288763, now seen corresponding path program 18 times [2020-10-16 11:37:43,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:43,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093410816] [2020-10-16 11:37:43,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:43,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:43,448 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:43,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093410816] [2020-10-16 11:37:43,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347583246] [2020-10-16 11:37:43,449 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:43,488 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 11:37:43,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:43,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:43,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:43,602 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:43,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:43,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:43,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825977388] [2020-10-16 11:37:43,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:43,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:43,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:43,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:43,604 INFO L87 Difference]: Start difference. First operand 130 states and 320 transitions. Second operand 15 states. [2020-10-16 11:37:43,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:43,902 INFO L93 Difference]: Finished difference Result 176 states and 410 transitions. [2020-10-16 11:37:43,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 11:37:43,903 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-16 11:37:43,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:43,905 INFO L225 Difference]: With dead ends: 176 [2020-10-16 11:37:43,905 INFO L226 Difference]: Without dead ends: 173 [2020-10-16 11:37:43,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=190, Invalid=460, Unknown=0, NotChecked=0, Total=650 [2020-10-16 11:37:43,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-16 11:37:43,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 132. [2020-10-16 11:37:43,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-16 11:37:43,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 327 transitions. [2020-10-16 11:37:43,909 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 327 transitions. Word has length 12 [2020-10-16 11:37:43,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:43,909 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 327 transitions. [2020-10-16 11:37:43,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:43,909 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 327 transitions. [2020-10-16 11:37:43,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:43,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:43,910 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:44,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2020-10-16 11:37:44,117 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:44,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:44,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1765980683, now seen corresponding path program 19 times [2020-10-16 11:37:44,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:44,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240014443] [2020-10-16 11:37:44,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:44,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:44,191 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:44,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240014443] [2020-10-16 11:37:44,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688241115] [2020-10-16 11:37:44,192 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:44,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:44,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:44,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:44,345 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:44,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:44,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:44,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129806695] [2020-10-16 11:37:44,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:44,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:44,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:44,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:44,347 INFO L87 Difference]: Start difference. First operand 132 states and 327 transitions. Second operand 15 states. [2020-10-16 11:37:44,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:44,619 INFO L93 Difference]: Finished difference Result 169 states and 398 transitions. [2020-10-16 11:37:44,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 11:37:44,620 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-16 11:37:44,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:44,622 INFO L225 Difference]: With dead ends: 169 [2020-10-16 11:37:44,622 INFO L226 Difference]: Without dead ends: 166 [2020-10-16 11:37:44,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=387, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:37:44,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-16 11:37:44,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 134. [2020-10-16 11:37:44,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-16 11:37:44,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 334 transitions. [2020-10-16 11:37:44,627 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 334 transitions. Word has length 12 [2020-10-16 11:37:44,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:44,628 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 334 transitions. [2020-10-16 11:37:44,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:44,628 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 334 transitions. [2020-10-16 11:37:44,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:44,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:44,629 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:44,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:44,841 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:44,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:44,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1766003003, now seen corresponding path program 20 times [2020-10-16 11:37:44,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:44,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733807454] [2020-10-16 11:37:44,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:44,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:44,925 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:44,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733807454] [2020-10-16 11:37:44,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612993161] [2020-10-16 11:37:44,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:44,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:44,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:44,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:44,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:45,042 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:37:45,054 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:45,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:45,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:45,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028739691] [2020-10-16 11:37:45,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:45,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:45,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:45,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:45,055 INFO L87 Difference]: Start difference. First operand 134 states and 334 transitions. Second operand 15 states. [2020-10-16 11:37:45,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:45,390 INFO L93 Difference]: Finished difference Result 176 states and 418 transitions. [2020-10-16 11:37:45,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:37:45,391 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-16 11:37:45,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:45,392 INFO L225 Difference]: With dead ends: 176 [2020-10-16 11:37:45,392 INFO L226 Difference]: Without dead ends: 170 [2020-10-16 11:37:45,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=203, Invalid=447, Unknown=0, NotChecked=0, Total=650 [2020-10-16 11:37:45,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-16 11:37:45,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 132. [2020-10-16 11:37:45,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-16 11:37:45,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-10-16 11:37:45,396 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 12 [2020-10-16 11:37:45,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:45,396 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-10-16 11:37:45,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:45,397 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-10-16 11:37:45,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:45,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:45,397 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:45,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:45,606 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:45,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:45,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1530333459, now seen corresponding path program 49 times [2020-10-16 11:37:45,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:45,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475805242] [2020-10-16 11:37:45,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:45,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:45,684 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:45,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475805242] [2020-10-16 11:37:45,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319319463] [2020-10-16 11:37:45,685 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:45,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:45,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:45,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:45,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:45,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:45,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:45,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810675092] [2020-10-16 11:37:45,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:45,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:45,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:45,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:45,843 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 15 states. [2020-10-16 11:37:45,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:45,904 INFO L93 Difference]: Finished difference Result 163 states and 394 transitions. [2020-10-16 11:37:45,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 11:37:45,904 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:45,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:45,906 INFO L225 Difference]: With dead ends: 163 [2020-10-16 11:37:45,906 INFO L226 Difference]: Without dead ends: 161 [2020-10-16 11:37:45,906 INFO L677 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 [2020-10-16 11:37:45,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-16 11:37:45,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 138. [2020-10-16 11:37:45,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-16 11:37:45,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 350 transitions. [2020-10-16 11:37:45,910 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 350 transitions. Word has length 13 [2020-10-16 11:37:45,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:45,910 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 350 transitions. [2020-10-16 11:37:45,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:45,910 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 350 transitions. [2020-10-16 11:37:45,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:45,911 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:45,911 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:46,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-10-16 11:37:46,112 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:46,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:46,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1530332498, now seen corresponding path program 50 times [2020-10-16 11:37:46,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:46,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337977201] [2020-10-16 11:37:46,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:46,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:46,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:46,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337977201] [2020-10-16 11:37:46,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272614121] [2020-10-16 11:37:46,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:46,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:46,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:46,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:46,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:46,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:46,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:46,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:46,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888101103] [2020-10-16 11:37:46,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:46,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:46,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:46,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:46,414 INFO L87 Difference]: Start difference. First operand 138 states and 350 transitions. Second operand 15 states. [2020-10-16 11:37:46,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:46,481 INFO L93 Difference]: Finished difference Result 172 states and 412 transitions. [2020-10-16 11:37:46,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 11:37:46,482 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:46,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:46,483 INFO L225 Difference]: With dead ends: 172 [2020-10-16 11:37:46,484 INFO L226 Difference]: Without dead ends: 170 [2020-10-16 11:37:46,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:37:46,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-16 11:37:46,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 136. [2020-10-16 11:37:46,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-16 11:37:46,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-10-16 11:37:46,486 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-10-16 11:37:46,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:46,486 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-10-16 11:37:46,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:46,487 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-10-16 11:37:46,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:46,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:46,487 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:46,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:46,688 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:46,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:46,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1530303668, now seen corresponding path program 51 times [2020-10-16 11:37:46,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:46,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238470405] [2020-10-16 11:37:46,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:46,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:46,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:46,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238470405] [2020-10-16 11:37:46,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789983329] [2020-10-16 11:37:46,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:46,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 11:37:46,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:46,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:46,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:46,990 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:46,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:46,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:46,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727837396] [2020-10-16 11:37:46,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:46,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:46,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:46,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:46,992 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-10-16 11:37:47,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:47,146 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-10-16 11:37:47,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:37:47,147 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:47,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:47,148 INFO L225 Difference]: With dead ends: 179 [2020-10-16 11:37:47,148 INFO L226 Difference]: Without dead ends: 177 [2020-10-16 11:37:47,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:37:47,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-16 11:37:47,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 134. [2020-10-16 11:37:47,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-16 11:37:47,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 338 transitions. [2020-10-16 11:37:47,152 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 338 transitions. Word has length 13 [2020-10-16 11:37:47,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:47,152 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 338 transitions. [2020-10-16 11:37:47,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:47,152 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 338 transitions. [2020-10-16 11:37:47,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:47,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:47,153 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:47,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-10-16 11:37:47,362 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:47,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:47,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1529409938, now seen corresponding path program 52 times [2020-10-16 11:37:47,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:47,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384012374] [2020-10-16 11:37:47,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:47,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:47,434 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:47,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384012374] [2020-10-16 11:37:47,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66640584] [2020-10-16 11:37:47,435 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:47,475 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:37:47,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:47,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:47,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:47,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:47,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:47,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:47,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586183775] [2020-10-16 11:37:47,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:47,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:47,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:47,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:47,587 INFO L87 Difference]: Start difference. First operand 134 states and 338 transitions. Second operand 15 states. [2020-10-16 11:37:47,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:47,749 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-10-16 11:37:47,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:37:47,750 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:47,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:47,751 INFO L225 Difference]: With dead ends: 179 [2020-10-16 11:37:47,751 INFO L226 Difference]: Without dead ends: 177 [2020-10-16 11:37:47,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:37:47,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-16 11:37:47,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 136. [2020-10-16 11:37:47,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-16 11:37:47,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-10-16 11:37:47,755 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-10-16 11:37:47,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:47,755 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-10-16 11:37:47,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:47,755 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-10-16 11:37:47,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:47,756 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:47,756 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:47,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-10-16 11:37:47,957 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:47,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:47,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1529408977, now seen corresponding path program 53 times [2020-10-16 11:37:47,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:47,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50871692] [2020-10-16 11:37:47,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:47,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:48,031 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:48,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50871692] [2020-10-16 11:37:48,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44498440] [2020-10-16 11:37:48,031 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:48,069 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:48,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:48,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:48,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:48,184 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:48,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:48,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:48,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265773003] [2020-10-16 11:37:48,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:48,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:48,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:48,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:48,186 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-10-16 11:37:48,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:48,368 INFO L93 Difference]: Finished difference Result 184 states and 436 transitions. [2020-10-16 11:37:48,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:37:48,369 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:48,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:48,370 INFO L225 Difference]: With dead ends: 184 [2020-10-16 11:37:48,371 INFO L226 Difference]: Without dead ends: 182 [2020-10-16 11:37:48,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:37:48,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-16 11:37:48,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 136. [2020-10-16 11:37:48,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-16 11:37:48,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 342 transitions. [2020-10-16 11:37:48,374 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 342 transitions. Word has length 13 [2020-10-16 11:37:48,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:48,374 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 342 transitions. [2020-10-16 11:37:48,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:48,374 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 342 transitions. [2020-10-16 11:37:48,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:48,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:48,375 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:48,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-10-16 11:37:48,576 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:48,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:48,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1529380147, now seen corresponding path program 54 times [2020-10-16 11:37:48,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:48,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157813187] [2020-10-16 11:37:48,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:48,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:48,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:48,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157813187] [2020-10-16 11:37:48,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271272928] [2020-10-16 11:37:48,651 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:48,689 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 11:37:48,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:48,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:48,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:48,817 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:48,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:48,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:48,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297351553] [2020-10-16 11:37:48,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:48,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:48,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:48,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:48,819 INFO L87 Difference]: Start difference. First operand 136 states and 342 transitions. Second operand 15 states. [2020-10-16 11:37:49,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:49,043 INFO L93 Difference]: Finished difference Result 179 states and 427 transitions. [2020-10-16 11:37:49,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:37:49,043 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:49,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:49,045 INFO L225 Difference]: With dead ends: 179 [2020-10-16 11:37:49,045 INFO L226 Difference]: Without dead ends: 177 [2020-10-16 11:37:49,045 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:37:49,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-16 11:37:49,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 135. [2020-10-16 11:37:49,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-16 11:37:49,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 339 transitions. [2020-10-16 11:37:49,048 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 339 transitions. Word has length 13 [2020-10-16 11:37:49,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:49,049 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 339 transitions. [2020-10-16 11:37:49,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:49,049 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 339 transitions. [2020-10-16 11:37:49,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:49,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:49,050 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:49,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:49,260 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:49,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:49,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1501704308, now seen corresponding path program 55 times [2020-10-16 11:37:49,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:49,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403597684] [2020-10-16 11:37:49,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:49,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:49,335 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:49,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403597684] [2020-10-16 11:37:49,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544970499] [2020-10-16 11:37:49,335 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:49,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:49,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:49,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:49,506 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:49,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:49,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:49,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124078306] [2020-10-16 11:37:49,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:49,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:49,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:49,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:49,509 INFO L87 Difference]: Start difference. First operand 135 states and 339 transitions. Second operand 15 states. [2020-10-16 11:37:49,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:49,754 INFO L93 Difference]: Finished difference Result 177 states and 424 transitions. [2020-10-16 11:37:49,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 11:37:49,754 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:49,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:49,756 INFO L225 Difference]: With dead ends: 177 [2020-10-16 11:37:49,756 INFO L226 Difference]: Without dead ends: 175 [2020-10-16 11:37:49,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=354, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:37:49,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-16 11:37:49,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 139. [2020-10-16 11:37:49,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-16 11:37:49,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 350 transitions. [2020-10-16 11:37:49,760 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 350 transitions. Word has length 13 [2020-10-16 11:37:49,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:49,760 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 350 transitions. [2020-10-16 11:37:49,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:49,760 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 350 transitions. [2020-10-16 11:37:49,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:49,761 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:49,761 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:49,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:49,968 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:49,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:49,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1501703347, now seen corresponding path program 56 times [2020-10-16 11:37:49,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:49,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223391420] [2020-10-16 11:37:49,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:49,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:50,033 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:50,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223391420] [2020-10-16 11:37:50,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675308660] [2020-10-16 11:37:50,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:50,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:50,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:50,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:50,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:50,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:50,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:50,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:50,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647969481] [2020-10-16 11:37:50,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:50,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:50,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:50,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:50,200 INFO L87 Difference]: Start difference. First operand 139 states and 350 transitions. Second operand 15 states. [2020-10-16 11:37:50,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:50,461 INFO L93 Difference]: Finished difference Result 187 states and 443 transitions. [2020-10-16 11:37:50,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:37:50,462 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:50,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:50,464 INFO L225 Difference]: With dead ends: 187 [2020-10-16 11:37:50,464 INFO L226 Difference]: Without dead ends: 185 [2020-10-16 11:37:50,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=150, Invalid=356, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:37:50,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-16 11:37:50,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 140. [2020-10-16 11:37:50,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-16 11:37:50,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 352 transitions. [2020-10-16 11:37:50,467 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 352 transitions. Word has length 13 [2020-10-16 11:37:50,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:50,468 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 352 transitions. [2020-10-16 11:37:50,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:50,468 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 352 transitions. [2020-10-16 11:37:50,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:50,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:50,468 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:50,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:50,671 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:50,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:50,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1501674517, now seen corresponding path program 57 times [2020-10-16 11:37:50,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:50,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772476649] [2020-10-16 11:37:50,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:50,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:50,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:50,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772476649] [2020-10-16 11:37:50,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626552423] [2020-10-16 11:37:50,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:50,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 11:37:50,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:50,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:50,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:50,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:50,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:50,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:50,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692911984] [2020-10-16 11:37:50,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:50,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:50,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:50,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:50,897 INFO L87 Difference]: Start difference. First operand 140 states and 352 transitions. Second operand 15 states. [2020-10-16 11:37:51,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:51,131 INFO L93 Difference]: Finished difference Result 181 states and 433 transitions. [2020-10-16 11:37:51,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:37:51,132 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:51,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:51,133 INFO L225 Difference]: With dead ends: 181 [2020-10-16 11:37:51,133 INFO L226 Difference]: Without dead ends: 179 [2020-10-16 11:37:51,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:37:51,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-16 11:37:51,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 138. [2020-10-16 11:37:51,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-16 11:37:51,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 345 transitions. [2020-10-16 11:37:51,136 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 345 transitions. Word has length 13 [2020-10-16 11:37:51,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:51,137 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 345 transitions. [2020-10-16 11:37:51,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:51,137 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 345 transitions. [2020-10-16 11:37:51,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:51,138 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:51,138 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:51,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:51,339 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:51,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:51,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1043911547, now seen corresponding path program 58 times [2020-10-16 11:37:51,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:51,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516276622] [2020-10-16 11:37:51,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:51,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:51,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:51,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516276622] [2020-10-16 11:37:51,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448834935] [2020-10-16 11:37:51,457 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:51,493 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:37:51,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:51,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:51,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:51,609 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:51,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:51,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:51,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205064957] [2020-10-16 11:37:51,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:51,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:51,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:51,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:51,611 INFO L87 Difference]: Start difference. First operand 138 states and 345 transitions. Second operand 15 states. [2020-10-16 11:37:51,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:51,688 INFO L93 Difference]: Finished difference Result 182 states and 432 transitions. [2020-10-16 11:37:51,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 11:37:51,688 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:51,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:51,690 INFO L225 Difference]: With dead ends: 182 [2020-10-16 11:37:51,690 INFO L226 Difference]: Without dead ends: 180 [2020-10-16 11:37:51,690 INFO L677 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 [2020-10-16 11:37:51,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-16 11:37:51,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 144. [2020-10-16 11:37:51,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-16 11:37:51,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 363 transitions. [2020-10-16 11:37:51,693 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 363 transitions. Word has length 13 [2020-10-16 11:37:51,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:51,693 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 363 transitions. [2020-10-16 11:37:51,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:51,694 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 363 transitions. [2020-10-16 11:37:51,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:51,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:51,694 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:51,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2020-10-16 11:37:51,904 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:51,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:51,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1043912508, now seen corresponding path program 59 times [2020-10-16 11:37:51,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:51,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31240670] [2020-10-16 11:37:51,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:51,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:52,018 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:52,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31240670] [2020-10-16 11:37:52,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579633059] [2020-10-16 11:37:52,019 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:52,075 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:52,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:52,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:52,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:52,185 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:52,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:52,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:52,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295673127] [2020-10-16 11:37:52,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:52,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:52,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:52,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:52,187 INFO L87 Difference]: Start difference. First operand 144 states and 363 transitions. Second operand 15 states. [2020-10-16 11:37:52,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:52,272 INFO L93 Difference]: Finished difference Result 185 states and 437 transitions. [2020-10-16 11:37:52,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:37:52,273 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:52,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:52,274 INFO L225 Difference]: With dead ends: 185 [2020-10-16 11:37:52,274 INFO L226 Difference]: Without dead ends: 183 [2020-10-16 11:37:52,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:37:52,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-16 11:37:52,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 142. [2020-10-16 11:37:52,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 11:37:52,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-10-16 11:37:52,278 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-10-16 11:37:52,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:52,278 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-10-16 11:37:52,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:52,278 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-10-16 11:37:52,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:52,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:52,280 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:52,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:52,481 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:52,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:52,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1043941338, now seen corresponding path program 60 times [2020-10-16 11:37:52,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:52,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343499515] [2020-10-16 11:37:52,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:52,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:52,601 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:52,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343499515] [2020-10-16 11:37:52,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050297235] [2020-10-16 11:37:52,602 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:52,652 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:37:52,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:52,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:52,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:52,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:52,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:52,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:52,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484108974] [2020-10-16 11:37:52,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:52,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:52,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:52,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:52,793 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-10-16 11:37:52,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:52,944 INFO L93 Difference]: Finished difference Result 191 states and 449 transitions. [2020-10-16 11:37:52,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:37:52,945 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:52,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:52,946 INFO L225 Difference]: With dead ends: 191 [2020-10-16 11:37:52,946 INFO L226 Difference]: Without dead ends: 189 [2020-10-16 11:37:52,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:37:52,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-16 11:37:52,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 140. [2020-10-16 11:37:52,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-16 11:37:52,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 351 transitions. [2020-10-16 11:37:52,950 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 351 transitions. Word has length 13 [2020-10-16 11:37:52,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:52,951 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 351 transitions. [2020-10-16 11:37:52,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:52,951 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 351 transitions. [2020-10-16 11:37:52,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:52,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:52,951 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:53,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:53,161 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:53,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:53,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1044835068, now seen corresponding path program 61 times [2020-10-16 11:37:53,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:53,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316928425] [2020-10-16 11:37:53,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:53,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:53,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:53,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316928425] [2020-10-16 11:37:53,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964387594] [2020-10-16 11:37:53,244 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:53,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:53,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:53,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:53,404 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:53,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:53,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:53,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876086348] [2020-10-16 11:37:53,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:53,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:53,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:53,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:53,405 INFO L87 Difference]: Start difference. First operand 140 states and 351 transitions. Second operand 15 states. [2020-10-16 11:37:53,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:53,577 INFO L93 Difference]: Finished difference Result 187 states and 441 transitions. [2020-10-16 11:37:53,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:37:53,578 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:53,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:53,579 INFO L225 Difference]: With dead ends: 187 [2020-10-16 11:37:53,579 INFO L226 Difference]: Without dead ends: 185 [2020-10-16 11:37:53,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:37:53,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-16 11:37:53,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 142. [2020-10-16 11:37:53,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 11:37:53,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-10-16 11:37:53,583 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-10-16 11:37:53,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:53,584 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-10-16 11:37:53,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:53,584 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-10-16 11:37:53,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:53,584 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:53,584 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:53,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:53,787 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:53,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:53,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1044836029, now seen corresponding path program 62 times [2020-10-16 11:37:53,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:53,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176447036] [2020-10-16 11:37:53,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:53,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:53,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:53,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176447036] [2020-10-16 11:37:53,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774719318] [2020-10-16 11:37:53,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:53,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:53,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:53,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:53,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:54,022 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:54,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:54,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:54,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77774524] [2020-10-16 11:37:54,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:54,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:54,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:54,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:54,024 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-10-16 11:37:54,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:54,212 INFO L93 Difference]: Finished difference Result 194 states and 455 transitions. [2020-10-16 11:37:54,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 11:37:54,213 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:54,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:54,214 INFO L225 Difference]: With dead ends: 194 [2020-10-16 11:37:54,214 INFO L226 Difference]: Without dead ends: 192 [2020-10-16 11:37:54,215 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:37:54,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-16 11:37:54,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 142. [2020-10-16 11:37:54,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 11:37:54,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 356 transitions. [2020-10-16 11:37:54,218 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 356 transitions. Word has length 13 [2020-10-16 11:37:54,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:54,218 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 356 transitions. [2020-10-16 11:37:54,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:54,218 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 356 transitions. [2020-10-16 11:37:54,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:54,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:54,219 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:54,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:54,420 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:54,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:54,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1044864859, now seen corresponding path program 63 times [2020-10-16 11:37:54,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:54,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725869680] [2020-10-16 11:37:54,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:54,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:54,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:54,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725869680] [2020-10-16 11:37:54,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211589581] [2020-10-16 11:37:54,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:54,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 11:37:54,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:54,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:54,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:54,694 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:54,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:54,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:54,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634918504] [2020-10-16 11:37:54,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:54,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:54,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:54,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:54,696 INFO L87 Difference]: Start difference. First operand 142 states and 356 transitions. Second operand 15 states. [2020-10-16 11:37:54,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:54,907 INFO L93 Difference]: Finished difference Result 186 states and 443 transitions. [2020-10-16 11:37:54,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 11:37:54,908 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:54,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:54,910 INFO L225 Difference]: With dead ends: 186 [2020-10-16 11:37:54,910 INFO L226 Difference]: Without dead ends: 184 [2020-10-16 11:37:54,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:37:54,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-16 11:37:54,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 139. [2020-10-16 11:37:54,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-16 11:37:54,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 347 transitions. [2020-10-16 11:37:54,913 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 347 transitions. Word has length 13 [2020-10-16 11:37:54,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:54,913 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 347 transitions. [2020-10-16 11:37:54,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:54,914 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 347 transitions. [2020-10-16 11:37:54,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:54,914 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:54,914 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:55,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-10-16 11:37:55,115 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:55,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:55,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1681141037, now seen corresponding path program 64 times [2020-10-16 11:37:55,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:55,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764551574] [2020-10-16 11:37:55,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:55,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:55,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:55,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764551574] [2020-10-16 11:37:55,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663903457] [2020-10-16 11:37:55,231 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:55,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:37:55,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:55,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:55,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:55,391 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:55,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:55,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:55,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061938650] [2020-10-16 11:37:55,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:55,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:55,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:55,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:55,393 INFO L87 Difference]: Start difference. First operand 139 states and 347 transitions. Second operand 15 states. [2020-10-16 11:37:55,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:55,472 INFO L93 Difference]: Finished difference Result 178 states and 423 transitions. [2020-10-16 11:37:55,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:37:55,472 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:55,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:55,473 INFO L225 Difference]: With dead ends: 178 [2020-10-16 11:37:55,473 INFO L226 Difference]: Without dead ends: 176 [2020-10-16 11:37:55,473 INFO L677 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 [2020-10-16 11:37:55,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-16 11:37:55,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 143. [2020-10-16 11:37:55,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-16 11:37:55,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 359 transitions. [2020-10-16 11:37:55,477 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 359 transitions. Word has length 13 [2020-10-16 11:37:55,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:55,477 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 359 transitions. [2020-10-16 11:37:55,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:55,478 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 359 transitions. [2020-10-16 11:37:55,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:55,478 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:55,478 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:55,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-10-16 11:37:55,685 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:55,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:55,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1681141998, now seen corresponding path program 65 times [2020-10-16 11:37:55,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:55,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379895796] [2020-10-16 11:37:55,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:55,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:55,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:55,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379895796] [2020-10-16 11:37:55,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139218071] [2020-10-16 11:37:55,779 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:55,818 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:55,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:55,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:55,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:55,935 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:55,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:55,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:55,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544616916] [2020-10-16 11:37:55,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:55,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:55,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:55,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:55,937 INFO L87 Difference]: Start difference. First operand 143 states and 359 transitions. Second operand 15 states. [2020-10-16 11:37:56,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:56,061 INFO L93 Difference]: Finished difference Result 181 states and 428 transitions. [2020-10-16 11:37:56,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:37:56,062 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:56,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:56,063 INFO L225 Difference]: With dead ends: 181 [2020-10-16 11:37:56,063 INFO L226 Difference]: Without dead ends: 179 [2020-10-16 11:37:56,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:37:56,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-16 11:37:56,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 141. [2020-10-16 11:37:56,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-16 11:37:56,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 353 transitions. [2020-10-16 11:37:56,067 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 353 transitions. Word has length 13 [2020-10-16 11:37:56,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:56,067 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 353 transitions. [2020-10-16 11:37:56,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:56,067 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 353 transitions. [2020-10-16 11:37:56,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:56,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:56,068 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:56,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:56,271 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:56,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:56,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1681170828, now seen corresponding path program 66 times [2020-10-16 11:37:56,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:56,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291526824] [2020-10-16 11:37:56,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:56,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:56,354 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:56,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291526824] [2020-10-16 11:37:56,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645512999] [2020-10-16 11:37:56,355 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:56,394 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:37:56,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:56,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:56,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:56,557 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:56,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:56,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:56,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815013148] [2020-10-16 11:37:56,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:56,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:56,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:56,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:56,558 INFO L87 Difference]: Start difference. First operand 141 states and 353 transitions. Second operand 15 states. [2020-10-16 11:37:56,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:56,740 INFO L93 Difference]: Finished difference Result 187 states and 440 transitions. [2020-10-16 11:37:56,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:37:56,741 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:56,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:56,742 INFO L225 Difference]: With dead ends: 187 [2020-10-16 11:37:56,742 INFO L226 Difference]: Without dead ends: 185 [2020-10-16 11:37:56,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:37:56,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-16 11:37:56,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 140. [2020-10-16 11:37:56,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-16 11:37:56,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 349 transitions. [2020-10-16 11:37:56,747 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 349 transitions. Word has length 13 [2020-10-16 11:37:56,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:56,747 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 349 transitions. [2020-10-16 11:37:56,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:56,747 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 349 transitions. [2020-10-16 11:37:56,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:56,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:56,748 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:56,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:56,954 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:56,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:56,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1701696827, now seen corresponding path program 67 times [2020-10-16 11:37:56,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:56,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813429769] [2020-10-16 11:37:56,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:56,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:57,052 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:57,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813429769] [2020-10-16 11:37:57,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501861311] [2020-10-16 11:37:57,053 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:57,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:57,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:57,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:57,221 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:57,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:57,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:57,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446427089] [2020-10-16 11:37:57,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:57,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:57,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:57,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:57,223 INFO L87 Difference]: Start difference. First operand 140 states and 349 transitions. Second operand 15 states. [2020-10-16 11:37:57,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:57,340 INFO L93 Difference]: Finished difference Result 174 states and 414 transitions. [2020-10-16 11:37:57,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:37:57,340 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:57,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:57,342 INFO L225 Difference]: With dead ends: 174 [2020-10-16 11:37:57,342 INFO L226 Difference]: Without dead ends: 172 [2020-10-16 11:37:57,342 INFO L677 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 [2020-10-16 11:37:57,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-16 11:37:57,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 142. [2020-10-16 11:37:57,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 11:37:57,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 355 transitions. [2020-10-16 11:37:57,345 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 355 transitions. Word has length 13 [2020-10-16 11:37:57,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:57,346 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 355 transitions. [2020-10-16 11:37:57,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:57,346 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 355 transitions. [2020-10-16 11:37:57,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:57,346 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:57,346 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:57,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:57,547 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:57,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:57,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1701697788, now seen corresponding path program 68 times [2020-10-16 11:37:57,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:57,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311679350] [2020-10-16 11:37:57,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:57,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:57,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:57,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311679350] [2020-10-16 11:37:57,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108801509] [2020-10-16 11:37:57,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:57,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:57,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:57,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:57,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:57,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:57,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:57,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:57,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613337831] [2020-10-16 11:37:57,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:57,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:57,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:57,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:57,793 INFO L87 Difference]: Start difference. First operand 142 states and 355 transitions. Second operand 15 states. [2020-10-16 11:37:57,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:57,934 INFO L93 Difference]: Finished difference Result 177 states and 419 transitions. [2020-10-16 11:37:57,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:37:57,935 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:57,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:57,936 INFO L225 Difference]: With dead ends: 177 [2020-10-16 11:37:57,936 INFO L226 Difference]: Without dead ends: 175 [2020-10-16 11:37:57,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:37:57,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-16 11:37:57,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 141. [2020-10-16 11:37:57,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-16 11:37:57,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 351 transitions. [2020-10-16 11:37:57,940 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 351 transitions. Word has length 13 [2020-10-16 11:37:57,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:57,940 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 351 transitions. [2020-10-16 11:37:57,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:57,940 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 351 transitions. [2020-10-16 11:37:57,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:57,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:57,941 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:58,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:58,142 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:58,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:58,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1702359917, now seen corresponding path program 69 times [2020-10-16 11:37:58,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:58,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024483223] [2020-10-16 11:37:58,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:58,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:58,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:58,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024483223] [2020-10-16 11:37:58,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867625602] [2020-10-16 11:37:58,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:58,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 11:37:58,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:58,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:58,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:58,387 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:58,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:58,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:58,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841519341] [2020-10-16 11:37:58,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:58,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:58,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:58,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:58,389 INFO L87 Difference]: Start difference. First operand 141 states and 351 transitions. Second operand 15 states. [2020-10-16 11:37:58,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:58,534 INFO L93 Difference]: Finished difference Result 175 states and 413 transitions. [2020-10-16 11:37:58,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:37:58,535 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:58,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:58,537 INFO L225 Difference]: With dead ends: 175 [2020-10-16 11:37:58,537 INFO L226 Difference]: Without dead ends: 173 [2020-10-16 11:37:58,537 INFO L677 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 [2020-10-16 11:37:58,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-16 11:37:58,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 145. [2020-10-16 11:37:58,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-16 11:37:58,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-16 11:37:58,540 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-16 11:37:58,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:58,540 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-16 11:37:58,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:58,540 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-16 11:37:58,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:58,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:58,541 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:58,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:58,742 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:58,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:58,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1702382237, now seen corresponding path program 70 times [2020-10-16 11:37:58,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:58,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719318916] [2020-10-16 11:37:58,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:58,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:58,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:58,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719318916] [2020-10-16 11:37:58,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528166937] [2020-10-16 11:37:58,815 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:58,850 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:37:58,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:58,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:58,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:58,955 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:37:58,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:58,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:58,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:58,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838540548] [2020-10-16 11:37:58,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:58,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:58,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:58,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:58,993 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-16 11:37:59,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:59,363 INFO L93 Difference]: Finished difference Result 195 states and 464 transitions. [2020-10-16 11:37:59,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:37:59,363 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:59,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:59,365 INFO L225 Difference]: With dead ends: 195 [2020-10-16 11:37:59,365 INFO L226 Difference]: Without dead ends: 190 [2020-10-16 11:37:59,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2020-10-16 11:37:59,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-16 11:37:59,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 143. [2020-10-16 11:37:59,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-16 11:37:59,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-10-16 11:37:59,369 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-10-16 11:37:59,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:59,369 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-10-16 11:37:59,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:59,369 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-10-16 11:37:59,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:59,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:59,369 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:59,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:59,570 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:59,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:59,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1702389708, now seen corresponding path program 71 times [2020-10-16 11:37:59,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:59,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631967107] [2020-10-16 11:37:59,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:59,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:59,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:59,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631967107] [2020-10-16 11:37:59,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249701120] [2020-10-16 11:37:59,640 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:37:59,679 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:59,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:59,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:59,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:59,796 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:59,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:59,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:59,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014418670] [2020-10-16 11:37:59,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:59,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:59,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:59,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:59,798 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-10-16 11:38:00,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:38:00,071 INFO L93 Difference]: Finished difference Result 187 states and 442 transitions. [2020-10-16 11:38:00,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 11:38:00,072 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:38:00,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:38:00,073 INFO L225 Difference]: With dead ends: 187 [2020-10-16 11:38:00,073 INFO L226 Difference]: Without dead ends: 185 [2020-10-16 11:38:00,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:38:00,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-16 11:38:00,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 145. [2020-10-16 11:38:00,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-16 11:38:00,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-16 11:38:00,077 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-16 11:38:00,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:38:00,078 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-16 11:38:00,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:38:00,078 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-16 11:38:00,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:38:00,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:38:00,078 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:38:00,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:38:00,279 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:38:00,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:38:00,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1702411067, now seen corresponding path program 72 times [2020-10-16 11:38:00,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:38:00,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914218800] [2020-10-16 11:38:00,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:38:00,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:00,354 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:38:00,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914218800] [2020-10-16 11:38:00,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525585036] [2020-10-16 11:38:00,355 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:38:00,394 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 11:38:00,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:38:00,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:38:00,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:38:00,509 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:38:00,536 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:38:00,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:38:00,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:38:00,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178610744] [2020-10-16 11:38:00,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:38:00,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:38:00,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:38:00,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:38:00,537 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-16 11:38:01,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:38:01,015 INFO L93 Difference]: Finished difference Result 212 states and 503 transitions. [2020-10-16 11:38:01,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 11:38:01,015 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:38:01,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:38:01,016 INFO L225 Difference]: With dead ends: 212 [2020-10-16 11:38:01,016 INFO L226 Difference]: Without dead ends: 207 [2020-10-16 11:38:01,017 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=265, Invalid=547, Unknown=0, NotChecked=0, Total=812 [2020-10-16 11:38:01,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-16 11:38:01,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-10-16 11:38:01,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-16 11:38:01,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-16 11:38:01,021 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-16 11:38:01,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:38:01,021 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-16 11:38:01,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:38:01,021 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-16 11:38:01,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:38:01,022 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:38:01,022 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:38:01,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2020-10-16 11:38:01,228 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:38:01,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:38:01,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1702412028, now seen corresponding path program 73 times [2020-10-16 11:38:01,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:38:01,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702282045] [2020-10-16 11:38:01,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:38:01,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:01,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:38:01,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702282045] [2020-10-16 11:38:01,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357296730] [2020-10-16 11:38:01,303 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:38:01,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:01,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:38:01,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:38:01,448 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:38:01,470 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:38:01,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:38:01,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:38:01,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199697501] [2020-10-16 11:38:01,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:38:01,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:38:01,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:38:01,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:38:01,471 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-16 11:38:01,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:38:01,827 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-10-16 11:38:01,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:38:01,827 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:38:01,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:38:01,829 INFO L225 Difference]: With dead ends: 202 [2020-10-16 11:38:01,829 INFO L226 Difference]: Without dead ends: 197 [2020-10-16 11:38:01,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=212, Invalid=438, Unknown=0, NotChecked=0, Total=650 [2020-10-16 11:38:01,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-16 11:38:01,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 141. [2020-10-16 11:38:01,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-16 11:38:01,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 343 transitions. [2020-10-16 11:38:01,832 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 343 transitions. Word has length 13 [2020-10-16 11:38:01,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:38:01,833 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 343 transitions. [2020-10-16 11:38:01,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:38:01,833 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 343 transitions. [2020-10-16 11:38:01,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:38:01,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:38:01,833 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:38:02,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:38:02,037 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:38:02,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:38:02,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1702620348, now seen corresponding path program 74 times [2020-10-16 11:38:02,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:38:02,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951416419] [2020-10-16 11:38:02,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:38:02,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:02,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:38:02,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951416419] [2020-10-16 11:38:02,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120512128] [2020-10-16 11:38:02,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:38:02,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:38:02,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:38:02,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:38:02,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:38:02,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:38:02,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:38:02,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:38:02,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633968803] [2020-10-16 11:38:02,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:38:02,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:38:02,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:38:02,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:38:02,793 INFO L87 Difference]: Start difference. First operand 141 states and 343 transitions. Second operand 15 states. [2020-10-16 11:38:03,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:38:03,106 INFO L93 Difference]: Finished difference Result 198 states and 460 transitions. [2020-10-16 11:38:03,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:38:03,107 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:38:03,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:38:03,108 INFO L225 Difference]: With dead ends: 198 [2020-10-16 11:38:03,108 INFO L226 Difference]: Without dead ends: 196 [2020-10-16 11:38:03,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=158, Invalid=394, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:38:03,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-16 11:38:03,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 143. [2020-10-16 11:38:03,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-16 11:38:03,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-10-16 11:38:03,112 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-10-16 11:38:03,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:38:03,112 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-10-16 11:38:03,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:38:03,112 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-10-16 11:38:03,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:38:03,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:38:03,113 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:38:03,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2020-10-16 11:38:03,314 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:38:03,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:38:03,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1703283438, now seen corresponding path program 75 times [2020-10-16 11:38:03,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:38:03,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258448754] [2020-10-16 11:38:03,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:38:03,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:03,382 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:38:03,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258448754] [2020-10-16 11:38:03,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207722133] [2020-10-16 11:38:03,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:38:03,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 11:38:03,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:38:03,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:38:03,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:38:03,577 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:38:03,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:38:03,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:38:03,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926847410] [2020-10-16 11:38:03,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:38:03,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:38:03,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:38:03,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:38:03,578 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-10-16 11:38:04,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:38:04,006 INFO L93 Difference]: Finished difference Result 209 states and 491 transitions. [2020-10-16 11:38:04,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 11:38:04,007 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:38:04,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:38:04,009 INFO L225 Difference]: With dead ends: 209 [2020-10-16 11:38:04,009 INFO L226 Difference]: Without dead ends: 207 [2020-10-16 11:38:04,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=219, Invalid=483, Unknown=0, NotChecked=0, Total=702 [2020-10-16 11:38:04,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-16 11:38:04,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-10-16 11:38:04,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-16 11:38:04,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-16 11:38:04,014 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-16 11:38:04,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:38:04,014 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-16 11:38:04,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:38:04,014 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-16 11:38:04,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:38:04,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:38:04,015 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:38:04,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:38:04,222 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:38:04,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:38:04,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1703304797, now seen corresponding path program 76 times [2020-10-16 11:38:04,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:38:04,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69400791] [2020-10-16 11:38:04,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:38:04,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:04,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:38:04,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69400791] [2020-10-16 11:38:04,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94970414] [2020-10-16 11:38:04,297 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:38:04,336 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:38:04,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:38:04,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:38:04,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:38:04,461 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:38:04,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:38:04,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:38:04,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:38:04,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11743768] [2020-10-16 11:38:04,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:38:04,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:38:04,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:38:04,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:38:04,496 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-16 11:38:05,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:38:05,107 INFO L93 Difference]: Finished difference Result 217 states and 518 transitions. [2020-10-16 11:38:05,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 11:38:05,107 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:38:05,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:38:05,108 INFO L225 Difference]: With dead ends: 217 [2020-10-16 11:38:05,109 INFO L226 Difference]: Without dead ends: 212 [2020-10-16 11:38:05,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=306, Invalid=624, Unknown=0, NotChecked=0, Total=930 [2020-10-16 11:38:05,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-16 11:38:05,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 146. [2020-10-16 11:38:05,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-16 11:38:05,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 362 transitions. [2020-10-16 11:38:05,113 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 362 transitions. Word has length 13 [2020-10-16 11:38:05,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:38:05,113 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 362 transitions. [2020-10-16 11:38:05,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:38:05,114 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 362 transitions. [2020-10-16 11:38:05,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:38:05,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:38:05,114 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:38:05,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-10-16 11:38:05,317 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:38:05,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:38:05,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1703305758, now seen corresponding path program 77 times [2020-10-16 11:38:05,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:38:05,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915848450] [2020-10-16 11:38:05,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:38:05,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:05,396 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:38:05,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915848450] [2020-10-16 11:38:05,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930778090] [2020-10-16 11:38:05,397 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:38:05,436 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:38:05,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:38:05,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:38:05,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:38:07,607 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:38:07,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:38:07,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:38:07,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:38:07,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208242618] [2020-10-16 11:38:07,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:38:07,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:38:07,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:38:07,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=144, Unknown=1, NotChecked=0, Total=210 [2020-10-16 11:38:07,651 INFO L87 Difference]: Start difference. First operand 146 states and 362 transitions. Second operand 15 states. [2020-10-16 11:38:12,004 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-16 11:38:16,238 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-10-16 11:38:16,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:38:16,730 INFO L93 Difference]: Finished difference Result 236 states and 562 transitions. [2020-10-16 11:38:16,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 11:38:16,731 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:38:16,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:38:16,732 INFO L225 Difference]: With dead ends: 236 [2020-10-16 11:38:16,732 INFO L226 Difference]: Without dead ends: 228 [2020-10-16 11:38:16,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=307, Invalid=684, Unknown=1, NotChecked=0, Total=992 [2020-10-16 11:38:16,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-16 11:38:16,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 141. [2020-10-16 11:38:16,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-16 11:38:16,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 346 transitions. [2020-10-16 11:38:16,735 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 346 transitions. Word has length 13 [2020-10-16 11:38:16,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:38:16,735 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 346 transitions. [2020-10-16 11:38:16,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:38:16,735 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 346 transitions. [2020-10-16 11:38:16,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:38:16,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:38:16,736 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:38:16,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2020-10-16 11:38:16,937 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:38:16,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:38:16,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1703334588, now seen corresponding path program 78 times [2020-10-16 11:38:16,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:38:16,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942173584] [2020-10-16 11:38:16,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:38:16,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:17,012 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:38:17,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942173584] [2020-10-16 11:38:17,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253503246] [2020-10-16 11:38:17,013 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:38:17,053 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 11:38:17,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:38:17,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:38:17,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:38:17,181 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:38:17,183 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:38:18,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:38:18,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:38:18,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-16 11:38:18,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658478071] [2020-10-16 11:38:18,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 11:38:18,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:38:18,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 11:38:18,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=171, Unknown=1, NotChecked=0, Total=240 [2020-10-16 11:38:18,275 INFO L87 Difference]: Start difference. First operand 141 states and 346 transitions. Second operand 16 states. [2020-10-16 11:38:20,777 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 39 [2020-10-16 11:38:28,209 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification that was a NOOP. DAG size: 46 [2020-10-16 11:38:32,399 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-16 11:39:02,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:39:02,509 INFO L93 Difference]: Finished difference Result 236 states and 556 transitions. [2020-10-16 11:39:02,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 11:39:02,510 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-10-16 11:39:02,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:39:02,510 INFO L225 Difference]: With dead ends: 236 [2020-10-16 11:39:02,510 INFO L226 Difference]: Without dead ends: 231 [2020-10-16 11:39:02,511 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 23.8s TimeCoverageRelationStatistics Valid=326, Invalid=785, Unknown=11, NotChecked=0, Total=1122 [2020-10-16 11:39:02,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-16 11:39:02,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 140. [2020-10-16 11:39:02,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-16 11:39:02,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 341 transitions. [2020-10-16 11:39:02,514 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 341 transitions. Word has length 13 [2020-10-16 11:39:02,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:39:02,514 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 341 transitions. [2020-10-16 11:39:02,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 11:39:02,514 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 341 transitions. [2020-10-16 11:39:02,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:39:02,515 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:39:02,515 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:39:02,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-10-16 11:39:02,723 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:39:02,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:39:02,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1709770188, now seen corresponding path program 79 times [2020-10-16 11:39:02,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:39:02,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611520867] [2020-10-16 11:39:02,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:39:02,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:02,802 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:02,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611520867] [2020-10-16 11:39:02,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878512251] [2020-10-16 11:39:02,803 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:39:02,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:02,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:39:02,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:39:03,007 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:03,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:39:03,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:39:03,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26084834] [2020-10-16 11:39:03,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:39:03,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:39:03,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:39:03,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:39:03,009 INFO L87 Difference]: Start difference. First operand 140 states and 341 transitions. Second operand 15 states. [2020-10-16 11:39:03,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:39:03,301 INFO L93 Difference]: Finished difference Result 197 states and 457 transitions. [2020-10-16 11:39:03,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:39:03,301 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:39:03,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:39:03,302 INFO L225 Difference]: With dead ends: 197 [2020-10-16 11:39:03,302 INFO L226 Difference]: Without dead ends: 195 [2020-10-16 11:39:03,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:39:03,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-16 11:39:03,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 143. [2020-10-16 11:39:03,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-16 11:39:03,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 352 transitions. [2020-10-16 11:39:03,306 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 352 transitions. Word has length 13 [2020-10-16 11:39:03,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:39:03,307 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 352 transitions. [2020-10-16 11:39:03,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:39:03,307 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 352 transitions. [2020-10-16 11:39:03,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:39:03,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:39:03,307 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:39:03,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:39:03,516 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:39:03,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:39:03,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1709771149, now seen corresponding path program 80 times [2020-10-16 11:39:03,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:39:03,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738731614] [2020-10-16 11:39:03,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:39:03,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:03,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:03,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738731614] [2020-10-16 11:39:03,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782908707] [2020-10-16 11:39:03,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:39:03,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:39:03,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:39:03,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:39:03,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:39:03,756 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:03,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:39:03,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:39:03,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580016667] [2020-10-16 11:39:03,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:39:03,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:39:03,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:39:03,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:39:03,757 INFO L87 Difference]: Start difference. First operand 143 states and 352 transitions. Second operand 15 states. [2020-10-16 11:39:04,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:39:04,071 INFO L93 Difference]: Finished difference Result 202 states and 467 transitions. [2020-10-16 11:39:04,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:39:04,072 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:39:04,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:39:04,072 INFO L225 Difference]: With dead ends: 202 [2020-10-16 11:39:04,072 INFO L226 Difference]: Without dead ends: 200 [2020-10-16 11:39:04,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:39:04,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-16 11:39:04,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 143. [2020-10-16 11:39:04,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-16 11:39:04,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 351 transitions. [2020-10-16 11:39:04,076 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 351 transitions. Word has length 13 [2020-10-16 11:39:04,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:39:04,076 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 351 transitions. [2020-10-16 11:39:04,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:39:04,077 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 351 transitions. [2020-10-16 11:39:04,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:39:04,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:39:04,077 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:39:04,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2020-10-16 11:39:04,278 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:39:04,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:39:04,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1709799979, now seen corresponding path program 81 times [2020-10-16 11:39:04,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:39:04,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563148623] [2020-10-16 11:39:04,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:39:04,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:04,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:04,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563148623] [2020-10-16 11:39:04,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862582429] [2020-10-16 11:39:04,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:39:04,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 11:39:04,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:39:04,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:39:04,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:39:04,584 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:04,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:39:04,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:39:04,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830549764] [2020-10-16 11:39:04,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:39:04,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:39:04,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:39:04,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:39:04,586 INFO L87 Difference]: Start difference. First operand 143 states and 351 transitions. Second operand 15 states. [2020-10-16 11:39:04,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:39:04,908 INFO L93 Difference]: Finished difference Result 197 states and 458 transitions. [2020-10-16 11:39:04,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:39:04,909 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:39:04,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:39:04,910 INFO L225 Difference]: With dead ends: 197 [2020-10-16 11:39:04,910 INFO L226 Difference]: Without dead ends: 195 [2020-10-16 11:39:04,910 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:39:04,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-16 11:39:04,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 142. [2020-10-16 11:39:04,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 11:39:04,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 348 transitions. [2020-10-16 11:39:04,913 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 348 transitions. Word has length 13 [2020-10-16 11:39:04,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:39:04,913 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 348 transitions. [2020-10-16 11:39:04,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:39:04,913 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 348 transitions. [2020-10-16 11:39:04,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:39:04,914 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:39:04,914 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:39:05,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:39:05,115 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:39:05,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:39:05,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1730325978, now seen corresponding path program 82 times [2020-10-16 11:39:05,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:39:05,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164459833] [2020-10-16 11:39:05,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:39:05,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:05,186 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:05,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164459833] [2020-10-16 11:39:05,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070404048] [2020-10-16 11:39:05,187 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:39:05,231 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:39:05,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:39:05,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:39:05,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:39:05,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:05,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:39:05,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:39:05,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132381723] [2020-10-16 11:39:05,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:39:05,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:39:05,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:39:05,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:39:05,451 INFO L87 Difference]: Start difference. First operand 142 states and 348 transitions. Second operand 15 states. [2020-10-16 11:39:06,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:39:06,100 INFO L93 Difference]: Finished difference Result 214 states and 496 transitions. [2020-10-16 11:39:06,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 11:39:06,101 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:39:06,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:39:06,103 INFO L225 Difference]: With dead ends: 214 [2020-10-16 11:39:06,103 INFO L226 Difference]: Without dead ends: 212 [2020-10-16 11:39:06,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=238, Invalid=574, Unknown=0, NotChecked=0, Total=812 [2020-10-16 11:39:06,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-16 11:39:06,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 144. [2020-10-16 11:39:06,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-16 11:39:06,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 356 transitions. [2020-10-16 11:39:06,109 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 356 transitions. Word has length 13 [2020-10-16 11:39:06,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:39:06,109 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 356 transitions. [2020-10-16 11:39:06,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:39:06,109 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 356 transitions. [2020-10-16 11:39:06,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:39:06,110 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:39:06,110 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:39:06,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-10-16 11:39:06,323 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:39:06,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:39:06,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1730326939, now seen corresponding path program 83 times [2020-10-16 11:39:06,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:39:06,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680879392] [2020-10-16 11:39:06,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:39:06,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:06,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:06,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680879392] [2020-10-16 11:39:06,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546366041] [2020-10-16 11:39:06,449 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:39:06,498 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:39:06,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:39:06,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:39:06,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:39:06,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:06,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:39:06,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:39:06,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380251311] [2020-10-16 11:39:06,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:39:06,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:39:06,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:39:06,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:39:06,632 INFO L87 Difference]: Start difference. First operand 144 states and 356 transitions. Second operand 15 states. [2020-10-16 11:39:07,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:39:07,075 INFO L93 Difference]: Finished difference Result 217 states and 502 transitions. [2020-10-16 11:39:07,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 11:39:07,076 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:39:07,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:39:07,077 INFO L225 Difference]: With dead ends: 217 [2020-10-16 11:39:07,077 INFO L226 Difference]: Without dead ends: 215 [2020-10-16 11:39:07,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-10-16 11:39:07,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-16 11:39:07,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 145. [2020-10-16 11:39:07,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-16 11:39:07,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-10-16 11:39:07,082 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-10-16 11:39:07,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:39:07,083 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-10-16 11:39:07,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:39:07,083 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-10-16 11:39:07,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:39:07,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:39:07,083 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:39:07,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:39:07,284 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:39:07,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:39:07,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1730989068, now seen corresponding path program 84 times [2020-10-16 11:39:07,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:39:07,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399417969] [2020-10-16 11:39:07,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:39:07,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:07,359 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:07,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399417969] [2020-10-16 11:39:07,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640472674] [2020-10-16 11:39:07,360 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:39:07,393 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:39:07,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:39:07,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:39:07,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:39:07,534 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:07,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:39:07,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:39:07,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808434005] [2020-10-16 11:39:07,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:39:07,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:39:07,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:39:07,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:39:07,536 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-10-16 11:39:08,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:39:08,003 INFO L93 Difference]: Finished difference Result 211 states and 500 transitions. [2020-10-16 11:39:08,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 11:39:08,003 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:39:08,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:39:08,004 INFO L225 Difference]: With dead ends: 211 [2020-10-16 11:39:08,004 INFO L226 Difference]: Without dead ends: 209 [2020-10-16 11:39:08,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=253, Invalid=559, Unknown=0, NotChecked=0, Total=812 [2020-10-16 11:39:08,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-16 11:39:08,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 147. [2020-10-16 11:39:08,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-16 11:39:08,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-16 11:39:08,008 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-16 11:39:08,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:39:08,008 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-16 11:39:08,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:39:08,008 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-16 11:39:08,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:39:08,009 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:39:08,009 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:39:08,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:39:08,210 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:39:08,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:39:08,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1731010427, now seen corresponding path program 85 times [2020-10-16 11:39:08,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:39:08,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373684331] [2020-10-16 11:39:08,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:39:08,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:08,284 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:08,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373684331] [2020-10-16 11:39:08,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098030883] [2020-10-16 11:39:08,285 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:39:08,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:08,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:39:08,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:39:08,436 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:39:08,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:08,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:39:08,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:39:08,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750873734] [2020-10-16 11:39:08,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:39:08,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:39:08,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:39:08,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:39:08,448 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-16 11:39:08,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:39:08,957 INFO L93 Difference]: Finished difference Result 211 states and 507 transitions. [2020-10-16 11:39:08,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 11:39:08,957 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:39:08,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:39:08,958 INFO L225 Difference]: With dead ends: 211 [2020-10-16 11:39:08,958 INFO L226 Difference]: Without dead ends: 206 [2020-10-16 11:39:08,958 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=342, Invalid=714, Unknown=0, NotChecked=0, Total=1056 [2020-10-16 11:39:08,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-16 11:39:08,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 147. [2020-10-16 11:39:08,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-16 11:39:08,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-16 11:39:08,962 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-16 11:39:08,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:39:08,962 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-16 11:39:08,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:39:08,962 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-16 11:39:08,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:39:08,962 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:39:08,963 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:39:09,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2020-10-16 11:39:09,164 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:39:09,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:39:09,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1731011388, now seen corresponding path program 86 times [2020-10-16 11:39:09,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:39:09,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464672858] [2020-10-16 11:39:09,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:39:09,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:09,245 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:09,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464672858] [2020-10-16 11:39:09,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406868513] [2020-10-16 11:39:09,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:39:09,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:39:09,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:39:09,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:39:09,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:39:09,460 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:39:09,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:09,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:39:09,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:39:09,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863699782] [2020-10-16 11:39:09,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:39:09,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:39:09,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:39:09,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:39:09,500 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-16 11:39:10,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:39:10,213 INFO L93 Difference]: Finished difference Result 227 states and 546 transitions. [2020-10-16 11:39:10,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 11:39:10,215 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:39:10,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:39:10,216 INFO L225 Difference]: With dead ends: 227 [2020-10-16 11:39:10,216 INFO L226 Difference]: Without dead ends: 222 [2020-10-16 11:39:10,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=341, Invalid=781, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 11:39:10,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-16 11:39:10,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 145. [2020-10-16 11:39:10,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-16 11:39:10,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-10-16 11:39:10,219 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-10-16 11:39:10,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:39:10,220 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-10-16 11:39:10,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:39:10,220 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-10-16 11:39:10,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:39:10,220 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:39:10,220 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:39:10,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-10-16 11:39:10,421 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:39:10,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:39:10,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1731018859, now seen corresponding path program 87 times [2020-10-16 11:39:10,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:39:10,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910416867] [2020-10-16 11:39:10,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:39:10,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:10,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:10,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910416867] [2020-10-16 11:39:10,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647790554] [2020-10-16 11:39:10,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:39:10,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 11:39:10,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:39:10,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:39:10,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:39:10,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:10,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:39:10,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:39:10,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543130384] [2020-10-16 11:39:10,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:39:10,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:39:10,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:39:10,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:39:10,654 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-10-16 11:39:11,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:39:11,156 INFO L93 Difference]: Finished difference Result 221 states and 523 transitions. [2020-10-16 11:39:11,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 11:39:11,157 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:39:11,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:39:11,157 INFO L225 Difference]: With dead ends: 221 [2020-10-16 11:39:11,157 INFO L226 Difference]: Without dead ends: 219 [2020-10-16 11:39:11,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=290, Invalid=702, Unknown=0, NotChecked=0, Total=992 [2020-10-16 11:39:11,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-16 11:39:11,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 147. [2020-10-16 11:39:11,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-16 11:39:11,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-16 11:39:11,160 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-16 11:39:11,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:39:11,160 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-16 11:39:11,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:39:11,161 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-16 11:39:11,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:39:11,161 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:39:11,161 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:39:11,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:39:11,367 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:39:11,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:39:11,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1731040218, now seen corresponding path program 88 times [2020-10-16 11:39:11,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:39:11,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937048708] [2020-10-16 11:39:11,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:39:11,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:11,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:11,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937048708] [2020-10-16 11:39:11,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394880665] [2020-10-16 11:39:11,445 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:39:11,482 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:39:11,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:39:11,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:39:11,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:39:11,585 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:39:11,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:11,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:39:11,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:39:11,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55456759] [2020-10-16 11:39:11,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:39:11,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:39:11,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:39:11,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:39:11,596 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-16 11:39:12,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:39:12,222 INFO L93 Difference]: Finished difference Result 240 states and 577 transitions. [2020-10-16 11:39:12,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 11:39:12,223 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:39:12,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:39:12,223 INFO L225 Difference]: With dead ends: 240 [2020-10-16 11:39:12,223 INFO L226 Difference]: Without dead ends: 232 [2020-10-16 11:39:12,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=365, Invalid=825, Unknown=0, NotChecked=0, Total=1190 [2020-10-16 11:39:12,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-16 11:39:12,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 148. [2020-10-16 11:39:12,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-16 11:39:12,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 372 transitions. [2020-10-16 11:39:12,228 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 372 transitions. Word has length 13 [2020-10-16 11:39:12,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:39:12,229 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 372 transitions. [2020-10-16 11:39:12,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:39:12,229 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 372 transitions. [2020-10-16 11:39:12,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:39:12,229 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:39:12,230 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:39:12,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-10-16 11:39:12,439 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:39:12,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:39:12,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1731041179, now seen corresponding path program 89 times [2020-10-16 11:39:12,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:39:12,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085264647] [2020-10-16 11:39:12,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:39:12,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:12,519 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:12,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085264647] [2020-10-16 11:39:12,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380267364] [2020-10-16 11:39:12,520 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:39:12,591 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:39:12,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:39:12,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:39:12,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:39:12,717 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:39:12,737 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:12,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:39:12,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:39:12,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767015285] [2020-10-16 11:39:12,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:39:12,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:39:12,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:39:12,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:39:12,740 INFO L87 Difference]: Start difference. First operand 148 states and 372 transitions. Second operand 15 states. [2020-10-16 11:39:13,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:39:13,495 INFO L93 Difference]: Finished difference Result 238 states and 576 transitions. [2020-10-16 11:39:13,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 11:39:13,495 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:39:13,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:39:13,496 INFO L225 Difference]: With dead ends: 238 [2020-10-16 11:39:13,496 INFO L226 Difference]: Without dead ends: 230 [2020-10-16 11:39:13,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=357, Invalid=833, Unknown=0, NotChecked=0, Total=1190 [2020-10-16 11:39:13,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-10-16 11:39:13,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 142. [2020-10-16 11:39:13,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 11:39:13,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-10-16 11:39:13,500 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-10-16 11:39:13,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:39:13,500 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-10-16 11:39:13,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:39:13,501 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-10-16 11:39:13,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:39:13,501 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:39:13,501 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:39:13,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-10-16 11:39:13,702 INFO L429 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:39:13,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:39:13,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1731249499, now seen corresponding path program 90 times [2020-10-16 11:39:13,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:39:13,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502357481] [2020-10-16 11:39:13,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:39:13,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:13,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:13,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502357481] [2020-10-16 11:39:13,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232335374] [2020-10-16 11:39:13,781 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:39:13,818 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 11:39:13,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:39:13,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:39:13,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:39:13,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:13,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:39:13,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:39:13,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572133311] [2020-10-16 11:39:13,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:39:13,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:39:13,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:39:13,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:39:13,977 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-10-16 11:39:14,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:39:14,274 INFO L93 Difference]: Finished difference Result 195 states and 459 transitions. [2020-10-16 11:39:14,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:39:14,275 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:39:14,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:39:14,276 INFO L225 Difference]: With dead ends: 195 [2020-10-16 11:39:14,276 INFO L226 Difference]: Without dead ends: 193 [2020-10-16 11:39:14,276 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=158, Invalid=394, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:39:14,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-16 11:39:14,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 142. [2020-10-16 11:39:14,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 11:39:14,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-10-16 11:39:14,279 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-10-16 11:39:14,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:39:14,279 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-10-16 11:39:14,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:39:14,279 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-10-16 11:39:14,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:39:14,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:39:14,280 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:39:14,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2020-10-16 11:39:14,481 INFO L429 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:39:14,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:39:14,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1731912589, now seen corresponding path program 91 times [2020-10-16 11:39:14,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:39:14,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387261199] [2020-10-16 11:39:14,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:39:14,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:14,564 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:14,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387261199] [2020-10-16 11:39:14,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474811761] [2020-10-16 11:39:14,565 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:39:14,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:14,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:39:14,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:39:14,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:14,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:39:14,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:39:14,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67015033] [2020-10-16 11:39:14,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:39:14,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:39:14,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:39:14,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:39:14,751 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-10-16 11:39:15,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:39:15,293 INFO L93 Difference]: Finished difference Result 206 states and 489 transitions. [2020-10-16 11:39:15,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 11:39:15,294 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:39:15,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:39:15,294 INFO L225 Difference]: With dead ends: 206 [2020-10-16 11:39:15,294 INFO L226 Difference]: Without dead ends: 204 [2020-10-16 11:39:15,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=243, Invalid=569, Unknown=0, NotChecked=0, Total=812 [2020-10-16 11:39:15,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-16 11:39:15,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 143. [2020-10-16 11:39:15,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-16 11:39:15,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 356 transitions. [2020-10-16 11:39:15,299 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 356 transitions. Word has length 13 [2020-10-16 11:39:15,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:39:15,299 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 356 transitions. [2020-10-16 11:39:15,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:39:15,300 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 356 transitions. [2020-10-16 11:39:15,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:39:15,300 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:39:15,300 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:39:15,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:39:15,509 INFO L429 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:39:15,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:39:15,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1731934909, now seen corresponding path program 92 times [2020-10-16 11:39:15,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:39:15,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029112044] [2020-10-16 11:39:15,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:39:15,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:15,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:15,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029112044] [2020-10-16 11:39:15,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337729746] [2020-10-16 11:39:15,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:39:15,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:39:15,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:39:15,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:39:15,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:39:15,760 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:39:19,155 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 19 [2020-10-16 11:39:19,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:19,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:39:19,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-16 11:39:19,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189558102] [2020-10-16 11:39:19,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 11:39:19,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:39:19,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 11:39:19,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=174, Unknown=1, NotChecked=0, Total=240 [2020-10-16 11:39:19,158 INFO L87 Difference]: Start difference. First operand 143 states and 356 transitions. Second operand 16 states. [2020-10-16 11:39:20,920 WARN L193 SmtUtils]: Spent 1.31 s on a formula simplification that was a NOOP. DAG size: 25 [2020-10-16 11:39:42,616 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 29 [2020-10-16 11:40:12,414 WARN L193 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2020-10-16 11:40:26,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:26,283 INFO L93 Difference]: Finished difference Result 239 states and 570 transitions. [2020-10-16 11:40:26,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 11:40:26,287 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-10-16 11:40:26,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:26,288 INFO L225 Difference]: With dead ends: 239 [2020-10-16 11:40:26,288 INFO L226 Difference]: Without dead ends: 234 [2020-10-16 11:40:26,288 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 33.9s TimeCoverageRelationStatistics Valid=402, Invalid=995, Unknown=9, NotChecked=0, Total=1406 [2020-10-16 11:40:26,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-10-16 11:40:26,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 139. [2020-10-16 11:40:26,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-16 11:40:26,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 339 transitions. [2020-10-16 11:40:26,291 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 339 transitions. Word has length 13 [2020-10-16 11:40:26,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:26,291 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 339 transitions. [2020-10-16 11:40:26,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 11:40:26,291 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 339 transitions. [2020-10-16 11:40:26,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:26,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:26,291 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:26,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-10-16 11:40:26,492 INFO L429 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:26,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:26,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1931415228, now seen corresponding path program 93 times [2020-10-16 11:40:26,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:26,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288341820] [2020-10-16 11:40:26,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:26,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:26,578 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:26,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288341820] [2020-10-16 11:40:26,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594325376] [2020-10-16 11:40:26,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:40:26,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 11:40:26,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:26,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:26,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:26,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:26,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:26,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:26,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965417016] [2020-10-16 11:40:26,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:26,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:26,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:26,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:26,768 INFO L87 Difference]: Start difference. First operand 139 states and 339 transitions. Second operand 15 states. [2020-10-16 11:40:27,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:27,099 INFO L93 Difference]: Finished difference Result 192 states and 445 transitions. [2020-10-16 11:40:27,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 11:40:27,099 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:27,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:27,100 INFO L225 Difference]: With dead ends: 192 [2020-10-16 11:40:27,100 INFO L226 Difference]: Without dead ends: 190 [2020-10-16 11:40:27,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=174, Invalid=426, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:40:27,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-16 11:40:27,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 141. [2020-10-16 11:40:27,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-16 11:40:27,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 345 transitions. [2020-10-16 11:40:27,102 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 345 transitions. Word has length 13 [2020-10-16 11:40:27,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:27,103 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 345 transitions. [2020-10-16 11:40:27,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:27,103 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 345 transitions. [2020-10-16 11:40:27,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:27,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:27,103 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:27,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2020-10-16 11:40:27,304 INFO L429 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:27,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:27,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1931416189, now seen corresponding path program 94 times [2020-10-16 11:40:27,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:27,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860244138] [2020-10-16 11:40:27,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:27,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:27,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:27,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860244138] [2020-10-16 11:40:27,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009808900] [2020-10-16 11:40:27,388 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:40:27,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:40:27,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:27,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:27,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:27,584 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:27,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:27,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:27,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749061635] [2020-10-16 11:40:27,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:27,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:27,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:27,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:27,586 INFO L87 Difference]: Start difference. First operand 141 states and 345 transitions. Second operand 15 states. [2020-10-16 11:40:27,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:27,942 INFO L93 Difference]: Finished difference Result 203 states and 467 transitions. [2020-10-16 11:40:27,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 11:40:27,943 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:27,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:27,944 INFO L225 Difference]: With dead ends: 203 [2020-10-16 11:40:27,944 INFO L226 Difference]: Without dead ends: 201 [2020-10-16 11:40:27,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=429, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:40:27,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-16 11:40:27,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 142. [2020-10-16 11:40:27,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 11:40:27,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 347 transitions. [2020-10-16 11:40:27,947 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 347 transitions. Word has length 13 [2020-10-16 11:40:27,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:27,947 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 347 transitions. [2020-10-16 11:40:27,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:27,947 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 347 transitions. [2020-10-16 11:40:27,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:27,948 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:27,948 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:28,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:28,149 INFO L429 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:28,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:28,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1931445019, now seen corresponding path program 95 times [2020-10-16 11:40:28,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:28,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755420966] [2020-10-16 11:40:28,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:28,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:28,234 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:28,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755420966] [2020-10-16 11:40:28,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870619877] [2020-10-16 11:40:28,235 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:40:28,272 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:40:28,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:28,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:28,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:28,414 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:28,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:28,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:28,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703503861] [2020-10-16 11:40:28,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:28,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:28,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:28,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:28,415 INFO L87 Difference]: Start difference. First operand 142 states and 347 transitions. Second operand 15 states. [2020-10-16 11:40:28,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:28,722 INFO L93 Difference]: Finished difference Result 194 states and 452 transitions. [2020-10-16 11:40:28,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 11:40:28,723 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:28,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:28,724 INFO L225 Difference]: With dead ends: 194 [2020-10-16 11:40:28,724 INFO L226 Difference]: Without dead ends: 192 [2020-10-16 11:40:28,725 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:40:28,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-16 11:40:28,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 137. [2020-10-16 11:40:28,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-16 11:40:28,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 334 transitions. [2020-10-16 11:40:28,728 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 334 transitions. Word has length 13 [2020-10-16 11:40:28,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:28,728 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 334 transitions. [2020-10-16 11:40:28,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:28,728 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 334 transitions. [2020-10-16 11:40:28,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:28,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:28,729 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:28,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:28,938 INFO L429 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:28,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:28,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1726322578, now seen corresponding path program 96 times [2020-10-16 11:40:28,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:28,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585943512] [2020-10-16 11:40:28,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:28,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:29,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:29,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585943512] [2020-10-16 11:40:29,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943834694] [2020-10-16 11:40:29,020 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:40:29,058 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 11:40:29,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:29,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:29,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:29,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:29,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:29,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:29,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280056951] [2020-10-16 11:40:29,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:29,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:29,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:29,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:29,207 INFO L87 Difference]: Start difference. First operand 137 states and 334 transitions. Second operand 15 states. [2020-10-16 11:40:29,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:29,767 INFO L93 Difference]: Finished difference Result 210 states and 483 transitions. [2020-10-16 11:40:29,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 11:40:29,768 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:29,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:29,769 INFO L225 Difference]: With dead ends: 210 [2020-10-16 11:40:29,769 INFO L226 Difference]: Without dead ends: 208 [2020-10-16 11:40:29,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=300, Invalid=756, Unknown=0, NotChecked=0, Total=1056 [2020-10-16 11:40:29,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-16 11:40:29,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 140. [2020-10-16 11:40:29,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-16 11:40:29,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 345 transitions. [2020-10-16 11:40:29,772 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 345 transitions. Word has length 13 [2020-10-16 11:40:29,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:29,773 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 345 transitions. [2020-10-16 11:40:29,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:29,773 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 345 transitions. [2020-10-16 11:40:29,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:29,773 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:29,773 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:29,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:29,974 INFO L429 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:29,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:29,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1726321617, now seen corresponding path program 97 times [2020-10-16 11:40:29,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:29,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598443004] [2020-10-16 11:40:29,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:29,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:30,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:30,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598443004] [2020-10-16 11:40:30,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634032210] [2020-10-16 11:40:30,058 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:40:30,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:30,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:30,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:30,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:30,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:30,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:30,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152724875] [2020-10-16 11:40:30,251 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:30,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:30,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:30,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:30,252 INFO L87 Difference]: Start difference. First operand 140 states and 345 transitions. Second operand 15 states. [2020-10-16 11:40:30,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:30,792 INFO L93 Difference]: Finished difference Result 219 states and 501 transitions. [2020-10-16 11:40:30,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 11:40:30,793 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:30,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:30,793 INFO L225 Difference]: With dead ends: 219 [2020-10-16 11:40:30,794 INFO L226 Difference]: Without dead ends: 217 [2020-10-16 11:40:30,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=246, Invalid=624, Unknown=0, NotChecked=0, Total=870 [2020-10-16 11:40:30,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-10-16 11:40:30,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 140. [2020-10-16 11:40:30,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-16 11:40:30,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 344 transitions. [2020-10-16 11:40:30,797 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 344 transitions. Word has length 13 [2020-10-16 11:40:30,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:30,797 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 344 transitions. [2020-10-16 11:40:30,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:30,797 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 344 transitions. [2020-10-16 11:40:30,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:30,798 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:30,798 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:30,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:30,999 INFO L429 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:30,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:30,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1726292787, now seen corresponding path program 98 times [2020-10-16 11:40:30,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:31,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929314465] [2020-10-16 11:40:31,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:31,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:31,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:31,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929314465] [2020-10-16 11:40:31,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646475310] [2020-10-16 11:40:31,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:40:31,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:40:31,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:31,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:31,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:31,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:31,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:31,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:31,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351032060] [2020-10-16 11:40:31,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:31,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:31,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:31,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:31,260 INFO L87 Difference]: Start difference. First operand 140 states and 344 transitions. Second operand 15 states. [2020-10-16 11:40:31,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:31,728 INFO L93 Difference]: Finished difference Result 196 states and 455 transitions. [2020-10-16 11:40:31,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 11:40:31,729 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:31,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:31,729 INFO L225 Difference]: With dead ends: 196 [2020-10-16 11:40:31,730 INFO L226 Difference]: Without dead ends: 194 [2020-10-16 11:40:31,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=225, Invalid=587, Unknown=0, NotChecked=0, Total=812 [2020-10-16 11:40:31,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-16 11:40:31,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 139. [2020-10-16 11:40:31,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-16 11:40:31,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-10-16 11:40:31,734 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-10-16 11:40:31,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:31,734 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-10-16 11:40:31,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:31,734 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-10-16 11:40:31,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:31,735 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:31,735 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:31,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2020-10-16 11:40:31,937 INFO L429 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:31,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:31,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1705766788, now seen corresponding path program 99 times [2020-10-16 11:40:31,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:31,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442019225] [2020-10-16 11:40:31,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:31,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:32,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:32,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442019225] [2020-10-16 11:40:32,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317674523] [2020-10-16 11:40:32,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:40:32,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 11:40:32,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:32,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:32,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:32,203 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:32,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:32,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:32,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682690985] [2020-10-16 11:40:32,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:32,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:32,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:32,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:32,205 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 15 states. [2020-10-16 11:40:32,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:32,879 INFO L93 Difference]: Finished difference Result 211 states and 490 transitions. [2020-10-16 11:40:32,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 11:40:32,880 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:32,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:32,881 INFO L225 Difference]: With dead ends: 211 [2020-10-16 11:40:32,881 INFO L226 Difference]: Without dead ends: 209 [2020-10-16 11:40:32,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=337, Invalid=785, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 11:40:32,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-16 11:40:32,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 141. [2020-10-16 11:40:32,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-16 11:40:32,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 349 transitions. [2020-10-16 11:40:32,884 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 349 transitions. Word has length 13 [2020-10-16 11:40:32,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:32,885 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 349 transitions. [2020-10-16 11:40:32,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:32,885 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 349 transitions. [2020-10-16 11:40:32,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:32,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:32,885 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:33,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-10-16 11:40:33,086 INFO L429 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:33,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:33,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1705765827, now seen corresponding path program 100 times [2020-10-16 11:40:33,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:33,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182198847] [2020-10-16 11:40:33,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:33,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:33,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:33,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182198847] [2020-10-16 11:40:33,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416230326] [2020-10-16 11:40:33,165 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:40:33,215 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:40:33,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:33,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:33,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:33,397 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:33,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:33,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:33,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139541053] [2020-10-16 11:40:33,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:33,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:33,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:33,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:33,400 INFO L87 Difference]: Start difference. First operand 141 states and 349 transitions. Second operand 15 states. [2020-10-16 11:40:34,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:34,066 INFO L93 Difference]: Finished difference Result 215 states and 498 transitions. [2020-10-16 11:40:34,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 11:40:34,066 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:34,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:34,067 INFO L225 Difference]: With dead ends: 215 [2020-10-16 11:40:34,067 INFO L226 Difference]: Without dead ends: 213 [2020-10-16 11:40:34,067 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=302, Invalid=754, Unknown=0, NotChecked=0, Total=1056 [2020-10-16 11:40:34,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-16 11:40:34,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 142. [2020-10-16 11:40:34,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 11:40:34,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-10-16 11:40:34,070 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-10-16 11:40:34,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:34,070 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-10-16 11:40:34,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:34,070 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-10-16 11:40:34,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:34,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:34,071 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:34,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-10-16 11:40:34,271 INFO L429 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:34,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:34,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1705103698, now seen corresponding path program 101 times [2020-10-16 11:40:34,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:34,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530593337] [2020-10-16 11:40:34,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:34,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:34,357 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:34,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530593337] [2020-10-16 11:40:34,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768738284] [2020-10-16 11:40:34,358 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:40:34,396 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:40:34,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:34,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:34,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:34,566 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:34,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:34,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:34,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790618839] [2020-10-16 11:40:34,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:34,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:34,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:34,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:34,568 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-10-16 11:40:35,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:35,224 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-10-16 11:40:35,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 11:40:35,224 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:35,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:35,225 INFO L225 Difference]: With dead ends: 202 [2020-10-16 11:40:35,225 INFO L226 Difference]: Without dead ends: 200 [2020-10-16 11:40:35,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 11:40:35,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-16 11:40:35,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 144. [2020-10-16 11:40:35,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-16 11:40:35,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-16 11:40:35,230 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-16 11:40:35,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:35,230 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-16 11:40:35,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:35,230 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-16 11:40:35,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:35,231 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:35,231 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:35,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:35,440 INFO L429 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:35,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:35,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1705082339, now seen corresponding path program 102 times [2020-10-16 11:40:35,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:35,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467310026] [2020-10-16 11:40:35,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:35,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:35,522 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:35,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467310026] [2020-10-16 11:40:35,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502102900] [2020-10-16 11:40:35,523 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:40:35,562 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 11:40:35,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:35,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:35,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:35,694 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:40:35,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:35,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:35,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:35,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159917273] [2020-10-16 11:40:35,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:35,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:35,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:35,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:35,707 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-16 11:40:36,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:36,313 INFO L93 Difference]: Finished difference Result 196 states and 472 transitions. [2020-10-16 11:40:36,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 11:40:36,314 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:36,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:36,315 INFO L225 Difference]: With dead ends: 196 [2020-10-16 11:40:36,315 INFO L226 Difference]: Without dead ends: 191 [2020-10-16 11:40:36,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=382, Invalid=808, Unknown=0, NotChecked=0, Total=1190 [2020-10-16 11:40:36,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-16 11:40:36,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 144. [2020-10-16 11:40:36,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-16 11:40:36,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-16 11:40:36,319 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-16 11:40:36,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:36,320 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-16 11:40:36,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:36,320 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-16 11:40:36,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:36,320 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:36,320 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:36,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2020-10-16 11:40:36,524 INFO L429 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:36,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:36,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1705081378, now seen corresponding path program 103 times [2020-10-16 11:40:36,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:36,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479642697] [2020-10-16 11:40:36,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:36,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:36,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:36,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479642697] [2020-10-16 11:40:36,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141752230] [2020-10-16 11:40:36,616 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:40:36,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:36,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:36,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:36,817 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:40:36,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:36,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:36,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:36,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629552741] [2020-10-16 11:40:36,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:36,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:36,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:36,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:36,874 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-16 11:40:37,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:37,858 INFO L93 Difference]: Finished difference Result 227 states and 547 transitions. [2020-10-16 11:40:37,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 11:40:37,858 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:37,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:37,859 INFO L225 Difference]: With dead ends: 227 [2020-10-16 11:40:37,860 INFO L226 Difference]: Without dead ends: 222 [2020-10-16 11:40:37,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=413, Invalid=993, Unknown=0, NotChecked=0, Total=1406 [2020-10-16 11:40:37,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-16 11:40:37,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 142. [2020-10-16 11:40:37,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 11:40:37,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-10-16 11:40:37,864 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-10-16 11:40:37,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:37,864 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-10-16 11:40:37,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:37,864 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-10-16 11:40:37,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:37,865 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:37,865 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:38,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:38,069 INFO L429 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:38,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:38,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1705073907, now seen corresponding path program 104 times [2020-10-16 11:40:38,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:38,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516181069] [2020-10-16 11:40:38,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:38,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:38,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:38,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516181069] [2020-10-16 11:40:38,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399809473] [2020-10-16 11:40:38,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:40:38,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:40:38,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:38,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:38,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:38,349 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:38,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:38,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:38,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714358902] [2020-10-16 11:40:38,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:38,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:38,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:38,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:38,351 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-10-16 11:40:39,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:39,110 INFO L93 Difference]: Finished difference Result 226 states and 535 transitions. [2020-10-16 11:40:39,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 11:40:39,111 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:39,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:39,112 INFO L225 Difference]: With dead ends: 226 [2020-10-16 11:40:39,112 INFO L226 Difference]: Without dead ends: 224 [2020-10-16 11:40:39,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=356, Invalid=904, Unknown=0, NotChecked=0, Total=1260 [2020-10-16 11:40:39,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-16 11:40:39,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 144. [2020-10-16 11:40:39,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-16 11:40:39,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-16 11:40:39,115 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-16 11:40:39,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:39,115 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-16 11:40:39,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:39,115 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-16 11:40:39,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:39,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:39,116 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:39,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2020-10-16 11:40:39,317 INFO L429 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:39,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:39,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1705052548, now seen corresponding path program 105 times [2020-10-16 11:40:39,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:39,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100595041] [2020-10-16 11:40:39,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:39,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:39,414 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:39,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100595041] [2020-10-16 11:40:39,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544932132] [2020-10-16 11:40:39,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:40:39,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 11:40:39,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:39,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:39,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:39,603 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:40:39,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:39,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:39,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:39,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435804412] [2020-10-16 11:40:39,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:39,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:39,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:39,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:39,642 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-16 11:40:40,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:40,659 INFO L93 Difference]: Finished difference Result 247 states and 597 transitions. [2020-10-16 11:40:40,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 11:40:40,660 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:40,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:40,660 INFO L225 Difference]: With dead ends: 247 [2020-10-16 11:40:40,661 INFO L226 Difference]: Without dead ends: 239 [2020-10-16 11:40:40,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=448, Invalid=1034, Unknown=0, NotChecked=0, Total=1482 [2020-10-16 11:40:40,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-16 11:40:40,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 146. [2020-10-16 11:40:40,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-16 11:40:40,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 370 transitions. [2020-10-16 11:40:40,664 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 370 transitions. Word has length 13 [2020-10-16 11:40:40,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:40,664 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 370 transitions. [2020-10-16 11:40:40,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:40,664 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 370 transitions. [2020-10-16 11:40:40,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:40,665 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:40,665 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:40,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:40,866 INFO L429 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:40,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:40,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1705051587, now seen corresponding path program 106 times [2020-10-16 11:40:40,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:40,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122488017] [2020-10-16 11:40:40,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:40,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:40,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:40,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122488017] [2020-10-16 11:40:40,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343911037] [2020-10-16 11:40:40,947 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:40:40,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:40:40,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:40,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:40,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:41,115 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:40:41,145 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:41,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:41,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:41,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406222344] [2020-10-16 11:40:41,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:41,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:41,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:41,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:41,147 INFO L87 Difference]: Start difference. First operand 146 states and 370 transitions. Second operand 15 states. [2020-10-16 11:40:42,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:42,299 INFO L93 Difference]: Finished difference Result 246 states and 590 transitions. [2020-10-16 11:40:42,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 11:40:42,300 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:42,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:42,301 INFO L225 Difference]: With dead ends: 246 [2020-10-16 11:40:42,301 INFO L226 Difference]: Without dead ends: 238 [2020-10-16 11:40:42,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=426, Invalid=1056, Unknown=0, NotChecked=0, Total=1482 [2020-10-16 11:40:42,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-10-16 11:40:42,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 139. [2020-10-16 11:40:42,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-16 11:40:42,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 344 transitions. [2020-10-16 11:40:42,306 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 344 transitions. Word has length 13 [2020-10-16 11:40:42,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:42,306 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 344 transitions. [2020-10-16 11:40:42,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:42,306 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 344 transitions. [2020-10-16 11:40:42,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:42,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:42,307 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:42,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable131 [2020-10-16 11:40:42,519 INFO L429 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:42,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:42,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1704843267, now seen corresponding path program 107 times [2020-10-16 11:40:42,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:42,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786631278] [2020-10-16 11:40:42,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:42,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:42,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:42,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786631278] [2020-10-16 11:40:42,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183889283] [2020-10-16 11:40:42,601 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:40:42,641 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:40:42,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:42,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:42,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:42,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:42,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:42,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:42,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971947377] [2020-10-16 11:40:42,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:42,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:42,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:42,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:42,770 INFO L87 Difference]: Start difference. First operand 139 states and 344 transitions. Second operand 15 states. [2020-10-16 11:40:43,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:43,350 INFO L93 Difference]: Finished difference Result 209 states and 489 transitions. [2020-10-16 11:40:43,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 11:40:43,351 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:43,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:43,351 INFO L225 Difference]: With dead ends: 209 [2020-10-16 11:40:43,352 INFO L226 Difference]: Without dead ends: 207 [2020-10-16 11:40:43,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=258, Invalid=672, Unknown=0, NotChecked=0, Total=930 [2020-10-16 11:40:43,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-16 11:40:43,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 136. [2020-10-16 11:40:43,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-16 11:40:43,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 337 transitions. [2020-10-16 11:40:43,355 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 337 transitions. Word has length 13 [2020-10-16 11:40:43,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:43,355 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 337 transitions. [2020-10-16 11:40:43,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:43,355 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 337 transitions. [2020-10-16 11:40:43,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:43,356 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:43,356 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:43,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:43,557 INFO L429 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:43,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:43,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1704180177, now seen corresponding path program 108 times [2020-10-16 11:40:43,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:43,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014053009] [2020-10-16 11:40:43,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:43,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:43,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:43,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014053009] [2020-10-16 11:40:43,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694492360] [2020-10-16 11:40:43,644 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:40:43,686 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 11:40:43,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:43,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:43,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:43,846 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:43,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:43,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:43,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853907936] [2020-10-16 11:40:43,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:43,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:43,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:43,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:43,848 INFO L87 Difference]: Start difference. First operand 136 states and 337 transitions. Second operand 15 states. [2020-10-16 11:40:44,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:44,615 INFO L93 Difference]: Finished difference Result 205 states and 487 transitions. [2020-10-16 11:40:44,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 11:40:44,616 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:44,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:44,617 INFO L225 Difference]: With dead ends: 205 [2020-10-16 11:40:44,617 INFO L226 Difference]: Without dead ends: 203 [2020-10-16 11:40:44,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=329, Invalid=793, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 11:40:44,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-16 11:40:44,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 137. [2020-10-16 11:40:44,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-16 11:40:44,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-10-16 11:40:44,620 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-10-16 11:40:44,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:44,621 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-10-16 11:40:44,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:44,621 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-10-16 11:40:44,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:44,621 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:44,621 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:44,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-10-16 11:40:44,822 INFO L429 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:44,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:44,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1704158818, now seen corresponding path program 109 times [2020-10-16 11:40:44,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:44,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769926847] [2020-10-16 11:40:44,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:44,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:44,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:44,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769926847] [2020-10-16 11:40:44,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813039431] [2020-10-16 11:40:44,916 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:40:44,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:44,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:44,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:45,080 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:40:45,091 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:45,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:45,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:45,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116357202] [2020-10-16 11:40:45,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:45,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:45,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:45,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:45,093 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-10-16 11:40:46,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:46,060 INFO L93 Difference]: Finished difference Result 228 states and 547 transitions. [2020-10-16 11:40:46,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 11:40:46,060 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:46,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:46,061 INFO L225 Difference]: With dead ends: 228 [2020-10-16 11:40:46,061 INFO L226 Difference]: Without dead ends: 220 [2020-10-16 11:40:46,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=520, Invalid=1286, Unknown=0, NotChecked=0, Total=1806 [2020-10-16 11:40:46,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-16 11:40:46,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 137. [2020-10-16 11:40:46,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-16 11:40:46,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-10-16 11:40:46,065 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-10-16 11:40:46,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:46,065 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-10-16 11:40:46,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:46,065 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-10-16 11:40:46,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:46,065 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:46,065 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:46,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2020-10-16 11:40:46,266 INFO L429 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:46,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:46,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1704157857, now seen corresponding path program 110 times [2020-10-16 11:40:46,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:46,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736716933] [2020-10-16 11:40:46,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:46,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:46,370 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:46,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736716933] [2020-10-16 11:40:46,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820233181] [2020-10-16 11:40:46,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:40:46,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:40:46,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:46,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:46,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:46,533 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:40:46,545 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:46,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:46,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:46,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820335089] [2020-10-16 11:40:46,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:46,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:46,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:46,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:46,547 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-10-16 11:40:47,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:47,460 INFO L93 Difference]: Finished difference Result 228 states and 550 transitions. [2020-10-16 11:40:47,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 11:40:47,461 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:47,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:47,462 INFO L225 Difference]: With dead ends: 228 [2020-10-16 11:40:47,462 INFO L226 Difference]: Without dead ends: 220 [2020-10-16 11:40:47,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=407, Invalid=999, Unknown=0, NotChecked=0, Total=1406 [2020-10-16 11:40:47,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-16 11:40:47,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 133. [2020-10-16 11:40:47,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-16 11:40:47,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 324 transitions. [2020-10-16 11:40:47,467 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 324 transitions. Word has length 13 [2020-10-16 11:40:47,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:47,467 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 324 transitions. [2020-10-16 11:40:47,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:47,467 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 324 transitions. [2020-10-16 11:40:47,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:47,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:47,468 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:47,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-10-16 11:40:47,677 INFO L429 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:47,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:47,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1704129027, now seen corresponding path program 111 times [2020-10-16 11:40:47,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:47,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462653970] [2020-10-16 11:40:47,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:47,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:47,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:47,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462653970] [2020-10-16 11:40:47,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916589908] [2020-10-16 11:40:47,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:40:47,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 11:40:47,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:47,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:47,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:47,941 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:40:47,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:47,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:47,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:47,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982224108] [2020-10-16 11:40:47,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:47,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:47,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:47,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:47,957 INFO L87 Difference]: Start difference. First operand 133 states and 324 transitions. Second operand 15 states. [2020-10-16 11:40:48,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:48,904 INFO L93 Difference]: Finished difference Result 224 states and 533 transitions. [2020-10-16 11:40:48,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 11:40:48,904 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:48,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:48,905 INFO L225 Difference]: With dead ends: 224 [2020-10-16 11:40:48,905 INFO L226 Difference]: Without dead ends: 216 [2020-10-16 11:40:48,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=403, Invalid=1003, Unknown=0, NotChecked=0, Total=1406 [2020-10-16 11:40:48,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-16 11:40:48,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 130. [2020-10-16 11:40:48,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-16 11:40:48,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 305 transitions. [2020-10-16 11:40:48,909 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 305 transitions. Word has length 13 [2020-10-16 11:40:48,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:48,909 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 305 transitions. [2020-10-16 11:40:48,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:48,909 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 305 transitions. [2020-10-16 11:40:48,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:48,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:48,910 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:49,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:49,119 INFO L429 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:49,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:49,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1141268816, now seen corresponding path program 6 times [2020-10-16 11:40:49,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:49,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141855243] [2020-10-16 11:40:49,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:49,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:49,248 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:49,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141855243] [2020-10-16 11:40:49,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921144067] [2020-10-16 11:40:49,249 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:40:49,288 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-16 11:40:49,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:49,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:40:49,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:49,494 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:40:49,538 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:49,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:49,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-10-16 11:40:49,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274714842] [2020-10-16 11:40:49,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 11:40:49,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:49,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 11:40:49,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:40:49,539 INFO L87 Difference]: Start difference. First operand 130 states and 305 transitions. Second operand 18 states. [2020-10-16 11:40:49,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:49,869 INFO L93 Difference]: Finished difference Result 185 states and 431 transitions. [2020-10-16 11:40:49,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 11:40:49,870 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 13 [2020-10-16 11:40:49,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:49,871 INFO L225 Difference]: With dead ends: 185 [2020-10-16 11:40:49,871 INFO L226 Difference]: Without dead ends: 180 [2020-10-16 11:40:49,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:40:49,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-16 11:40:49,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 139. [2020-10-16 11:40:49,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-16 11:40:49,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-10-16 11:40:49,875 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-10-16 11:40:49,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:49,875 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-10-16 11:40:49,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 11:40:49,875 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-10-16 11:40:49,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:49,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:49,876 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:50,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:50,086 INFO L429 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:50,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:50,086 INFO L82 PathProgramCache]: Analyzing trace with hash 33766584, now seen corresponding path program 21 times [2020-10-16 11:40:50,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:50,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487042078] [2020-10-16 11:40:50,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:50,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:50,195 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:50,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487042078] [2020-10-16 11:40:50,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214520086] [2020-10-16 11:40:50,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:50,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-16 11:40:50,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:50,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:40:50,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:50,416 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:50,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:50,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:40:50,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475103531] [2020-10-16 11:40:50,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:40:50,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:50,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:40:50,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:40:50,418 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 17 states. [2020-10-16 11:40:50,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:50,654 INFO L93 Difference]: Finished difference Result 186 states and 435 transitions. [2020-10-16 11:40:50,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:40:50,656 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-16 11:40:50,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:50,656 INFO L225 Difference]: With dead ends: 186 [2020-10-16 11:40:50,657 INFO L226 Difference]: Without dead ends: 183 [2020-10-16 11:40:50,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:40:50,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-16 11:40:50,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 148. [2020-10-16 11:40:50,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-16 11:40:50,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 362 transitions. [2020-10-16 11:40:50,660 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 362 transitions. Word has length 13 [2020-10-16 11:40:50,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:50,660 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 362 transitions. [2020-10-16 11:40:50,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:40:50,660 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 362 transitions. [2020-10-16 11:40:50,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:50,661 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:50,661 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:50,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2020-10-16 11:40:50,862 INFO L429 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:50,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:50,862 INFO L82 PathProgramCache]: Analyzing trace with hash -913710200, now seen corresponding path program 22 times [2020-10-16 11:40:50,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:50,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581306155] [2020-10-16 11:40:50,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:50,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:50,972 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:50,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581306155] [2020-10-16 11:40:50,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178407990] [2020-10-16 11:40:50,973 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:51,012 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:40:51,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:51,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:40:51,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:51,219 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:51,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:51,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:40:51,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53254033] [2020-10-16 11:40:51,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:40:51,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:51,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:40:51,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:40:51,221 INFO L87 Difference]: Start difference. First operand 148 states and 362 transitions. Second operand 17 states. [2020-10-16 11:40:51,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:51,585 INFO L93 Difference]: Finished difference Result 203 states and 468 transitions. [2020-10-16 11:40:51,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 11:40:51,585 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-16 11:40:51,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:51,586 INFO L225 Difference]: With dead ends: 203 [2020-10-16 11:40:51,586 INFO L226 Difference]: Without dead ends: 200 [2020-10-16 11:40:51,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2020-10-16 11:40:51,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-16 11:40:51,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 148. [2020-10-16 11:40:51,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-16 11:40:51,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 362 transitions. [2020-10-16 11:40:51,590 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 362 transitions. Word has length 13 [2020-10-16 11:40:51,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:51,590 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 362 transitions. [2020-10-16 11:40:51,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:40:51,590 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 362 transitions. [2020-10-16 11:40:51,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:51,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:51,590 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:51,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-10-16 11:40:51,791 INFO L429 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:51,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:51,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1775557960, now seen corresponding path program 23 times [2020-10-16 11:40:51,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:51,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71461450] [2020-10-16 11:40:51,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:51,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:51,901 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:51,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71461450] [2020-10-16 11:40:51,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859847716] [2020-10-16 11:40:51,902 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:51,938 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-16 11:40:51,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:51,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:40:51,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:52,126 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:52,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:52,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:40:52,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296625975] [2020-10-16 11:40:52,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:40:52,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:52,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:40:52,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:40:52,128 INFO L87 Difference]: Start difference. First operand 148 states and 362 transitions. Second operand 17 states. [2020-10-16 11:40:52,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:52,570 INFO L93 Difference]: Finished difference Result 211 states and 486 transitions. [2020-10-16 11:40:52,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 11:40:52,571 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-16 11:40:52,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:52,572 INFO L225 Difference]: With dead ends: 211 [2020-10-16 11:40:52,572 INFO L226 Difference]: Without dead ends: 208 [2020-10-16 11:40:52,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=235, Invalid=635, Unknown=0, NotChecked=0, Total=870 [2020-10-16 11:40:52,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-16 11:40:52,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 149. [2020-10-16 11:40:52,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-16 11:40:52,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 367 transitions. [2020-10-16 11:40:52,577 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 367 transitions. Word has length 13 [2020-10-16 11:40:52,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:52,577 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 367 transitions. [2020-10-16 11:40:52,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:40:52,577 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 367 transitions. [2020-10-16 11:40:52,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:52,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:52,578 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:52,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:52,788 INFO L429 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:52,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:52,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1110622840, now seen corresponding path program 24 times [2020-10-16 11:40:52,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:52,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261113525] [2020-10-16 11:40:52,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:52,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:52,894 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:52,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261113525] [2020-10-16 11:40:52,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093191998] [2020-10-16 11:40:52,895 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:52,934 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-16 11:40:52,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:52,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:40:52,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:53,146 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:53,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:53,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:40:53,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691322412] [2020-10-16 11:40:53,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:40:53,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:53,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:40:53,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:40:53,148 INFO L87 Difference]: Start difference. First operand 149 states and 367 transitions. Second operand 17 states. [2020-10-16 11:40:53,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:53,682 INFO L93 Difference]: Finished difference Result 213 states and 492 transitions. [2020-10-16 11:40:53,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 11:40:53,683 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-16 11:40:53,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:53,683 INFO L225 Difference]: With dead ends: 213 [2020-10-16 11:40:53,684 INFO L226 Difference]: Without dead ends: 210 [2020-10-16 11:40:53,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=276, Invalid=716, Unknown=0, NotChecked=0, Total=992 [2020-10-16 11:40:53,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-16 11:40:53,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 150. [2020-10-16 11:40:53,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-16 11:40:53,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 372 transitions. [2020-10-16 11:40:53,687 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 372 transitions. Word has length 13 [2020-10-16 11:40:53,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:53,687 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 372 transitions. [2020-10-16 11:40:53,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:40:53,687 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 372 transitions. [2020-10-16 11:40:53,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:53,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:53,687 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:53,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:53,888 INFO L429 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:53,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:53,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1089173320, now seen corresponding path program 25 times [2020-10-16 11:40:53,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:53,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065272262] [2020-10-16 11:40:53,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:53,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:53,988 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:53,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065272262] [2020-10-16 11:40:53,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210235194] [2020-10-16 11:40:53,989 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:54,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:54,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:40:54,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:54,207 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:54,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:54,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:40:54,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060112306] [2020-10-16 11:40:54,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:40:54,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:54,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:40:54,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:40:54,209 INFO L87 Difference]: Start difference. First operand 150 states and 372 transitions. Second operand 17 states. [2020-10-16 11:40:54,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:54,697 INFO L93 Difference]: Finished difference Result 207 states and 482 transitions. [2020-10-16 11:40:54,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 11:40:54,698 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-16 11:40:54,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:54,699 INFO L225 Difference]: With dead ends: 207 [2020-10-16 11:40:54,699 INFO L226 Difference]: Without dead ends: 204 [2020-10-16 11:40:54,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=267, Invalid=663, Unknown=0, NotChecked=0, Total=930 [2020-10-16 11:40:54,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-16 11:40:54,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 152. [2020-10-16 11:40:54,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-16 11:40:54,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 379 transitions. [2020-10-16 11:40:54,702 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 379 transitions. Word has length 13 [2020-10-16 11:40:54,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:54,702 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 379 transitions. [2020-10-16 11:40:54,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:40:54,702 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 379 transitions. [2020-10-16 11:40:54,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:54,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:54,702 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:54,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:54,903 INFO L429 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:54,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:54,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1088481400, now seen corresponding path program 26 times [2020-10-16 11:40:54,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:54,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929572211] [2020-10-16 11:40:54,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:54,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:55,006 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:55,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929572211] [2020-10-16 11:40:55,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690027686] [2020-10-16 11:40:55,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:55,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:40:55,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:55,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:40:55,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:55,214 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:55,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:55,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:40:55,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682888786] [2020-10-16 11:40:55,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:40:55,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:55,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:40:55,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:40:55,216 INFO L87 Difference]: Start difference. First operand 152 states and 379 transitions. Second operand 17 states. [2020-10-16 11:40:55,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:55,600 INFO L93 Difference]: Finished difference Result 197 states and 464 transitions. [2020-10-16 11:40:55,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:40:55,601 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-16 11:40:55,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:55,602 INFO L225 Difference]: With dead ends: 197 [2020-10-16 11:40:55,602 INFO L226 Difference]: Without dead ends: 194 [2020-10-16 11:40:55,603 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=221, Invalid=535, Unknown=0, NotChecked=0, Total=756 [2020-10-16 11:40:55,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-16 11:40:55,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 154. [2020-10-16 11:40:55,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-16 11:40:55,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 386 transitions. [2020-10-16 11:40:55,606 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 386 transitions. Word has length 13 [2020-10-16 11:40:55,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:55,606 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 386 transitions. [2020-10-16 11:40:55,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:40:55,607 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 386 transitions. [2020-10-16 11:40:55,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:55,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:55,607 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:55,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2020-10-16 11:40:55,815 INFO L429 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:55,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:55,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1088459080, now seen corresponding path program 27 times [2020-10-16 11:40:55,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:55,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822638352] [2020-10-16 11:40:55,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:55,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:55,918 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:55,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822638352] [2020-10-16 11:40:55,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764016056] [2020-10-16 11:40:55,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:55,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-16 11:40:55,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:55,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:40:55,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:56,086 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:40:56,103 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:56,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:56,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:40:56,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143990245] [2020-10-16 11:40:56,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:40:56,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:56,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:40:56,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:40:56,105 INFO L87 Difference]: Start difference. First operand 154 states and 386 transitions. Second operand 17 states. [2020-10-16 11:40:56,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:56,563 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-10-16 11:40:56,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 11:40:56,564 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-16 11:40:56,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:56,564 INFO L225 Difference]: With dead ends: 202 [2020-10-16 11:40:56,565 INFO L226 Difference]: Without dead ends: 196 [2020-10-16 11:40:56,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=265, Invalid=605, Unknown=0, NotChecked=0, Total=870 [2020-10-16 11:40:56,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-16 11:40:56,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 151. [2020-10-16 11:40:56,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-16 11:40:56,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 382 transitions. [2020-10-16 11:40:56,568 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 382 transitions. Word has length 13 [2020-10-16 11:40:56,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:56,568 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 382 transitions. [2020-10-16 11:40:56,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:40:56,568 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 382 transitions. [2020-10-16 11:40:56,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:40:56,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:56,569 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:56,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2020-10-16 11:40:56,770 INFO L429 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:56,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:56,770 INFO L82 PathProgramCache]: Analyzing trace with hash -195697579, now seen corresponding path program 112 times [2020-10-16 11:40:56,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:56,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650464161] [2020-10-16 11:40:56,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:56,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:56,904 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:56,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650464161] [2020-10-16 11:40:56,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674436532] [2020-10-16 11:40:56,905 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:56,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:40:56,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:56,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:40:56,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:57,138 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:57,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:57,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:40:57,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470480286] [2020-10-16 11:40:57,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:40:57,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:57,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:40:57,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:40:57,139 INFO L87 Difference]: Start difference. First operand 151 states and 382 transitions. Second operand 17 states. [2020-10-16 11:40:57,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:57,212 INFO L93 Difference]: Finished difference Result 188 states and 456 transitions. [2020-10-16 11:40:57,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 11:40:57,213 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:40:57,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:57,214 INFO L225 Difference]: With dead ends: 188 [2020-10-16 11:40:57,214 INFO L226 Difference]: Without dead ends: 186 [2020-10-16 11:40:57,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:40:57,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-16 11:40:57,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 159. [2020-10-16 11:40:57,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-16 11:40:57,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 406 transitions. [2020-10-16 11:40:57,217 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 406 transitions. Word has length 14 [2020-10-16 11:40:57,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:57,217 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 406 transitions. [2020-10-16 11:40:57,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:40:57,217 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 406 transitions. [2020-10-16 11:40:57,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:40:57,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:57,218 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:57,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-10-16 11:40:57,419 INFO L429 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:57,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:57,419 INFO L82 PathProgramCache]: Analyzing trace with hash -195696618, now seen corresponding path program 113 times [2020-10-16 11:40:57,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:57,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450183857] [2020-10-16 11:40:57,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:57,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:57,532 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:57,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450183857] [2020-10-16 11:40:57,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169952590] [2020-10-16 11:40:57,533 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:57,570 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:40:57,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:57,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:40:57,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:57,786 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:57,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:57,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:40:57,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54404595] [2020-10-16 11:40:57,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:40:57,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:57,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:40:57,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:40:57,789 INFO L87 Difference]: Start difference. First operand 159 states and 406 transitions. Second operand 17 states. [2020-10-16 11:40:57,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:57,883 INFO L93 Difference]: Finished difference Result 199 states and 478 transitions. [2020-10-16 11:40:57,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:40:57,884 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:40:57,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:57,884 INFO L225 Difference]: With dead ends: 199 [2020-10-16 11:40:57,884 INFO L226 Difference]: Without dead ends: 197 [2020-10-16 11:40:57,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:40:57,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-16 11:40:57,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 157. [2020-10-16 11:40:57,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-16 11:40:57,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 400 transitions. [2020-10-16 11:40:57,888 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 400 transitions. Word has length 14 [2020-10-16 11:40:57,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:57,888 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 400 transitions. [2020-10-16 11:40:57,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:40:57,888 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 400 transitions. [2020-10-16 11:40:57,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:40:57,888 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:57,888 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:58,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-10-16 11:40:58,089 INFO L429 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:58,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:58,090 INFO L82 PathProgramCache]: Analyzing trace with hash -195667788, now seen corresponding path program 114 times [2020-10-16 11:40:58,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:58,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938185266] [2020-10-16 11:40:58,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:58,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:58,203 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:58,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938185266] [2020-10-16 11:40:58,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995621729] [2020-10-16 11:40:58,204 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:58,243 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 11:40:58,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:58,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:40:58,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:58,495 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:58,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:58,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:40:58,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076248257] [2020-10-16 11:40:58,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:40:58,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:58,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:40:58,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:40:58,496 INFO L87 Difference]: Start difference. First operand 157 states and 400 transitions. Second operand 17 states. [2020-10-16 11:40:58,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:58,711 INFO L93 Difference]: Finished difference Result 210 states and 500 transitions. [2020-10-16 11:40:58,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:40:58,712 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:40:58,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:58,712 INFO L225 Difference]: With dead ends: 210 [2020-10-16 11:40:58,712 INFO L226 Difference]: Without dead ends: 208 [2020-10-16 11:40:58,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:40:58,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-16 11:40:58,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 155. [2020-10-16 11:40:58,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-16 11:40:58,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 394 transitions. [2020-10-16 11:40:58,716 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 394 transitions. Word has length 14 [2020-10-16 11:40:58,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:58,716 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 394 transitions. [2020-10-16 11:40:58,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:40:58,716 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 394 transitions. [2020-10-16 11:40:58,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:40:58,716 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:58,716 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:58,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-10-16 11:40:58,917 INFO L429 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:58,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:58,918 INFO L82 PathProgramCache]: Analyzing trace with hash -194774058, now seen corresponding path program 115 times [2020-10-16 11:40:58,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:58,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724922311] [2020-10-16 11:40:58,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:58,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:59,028 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:59,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724922311] [2020-10-16 11:40:59,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781895250] [2020-10-16 11:40:59,029 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:59,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:59,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:40:59,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:59,501 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:59,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:59,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:40:59,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775494021] [2020-10-16 11:40:59,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:40:59,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:59,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:40:59,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:40:59,503 INFO L87 Difference]: Start difference. First operand 155 states and 394 transitions. Second operand 17 states. [2020-10-16 11:40:59,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:59,938 INFO L93 Difference]: Finished difference Result 210 states and 500 transitions. [2020-10-16 11:40:59,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:40:59,939 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:40:59,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:59,940 INFO L225 Difference]: With dead ends: 210 [2020-10-16 11:40:59,941 INFO L226 Difference]: Without dead ends: 208 [2020-10-16 11:40:59,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:40:59,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-16 11:40:59,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 157. [2020-10-16 11:40:59,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-16 11:40:59,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 400 transitions. [2020-10-16 11:40:59,946 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 400 transitions. Word has length 14 [2020-10-16 11:40:59,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:59,946 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 400 transitions. [2020-10-16 11:40:59,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:40:59,946 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 400 transitions. [2020-10-16 11:40:59,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:40:59,947 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:59,947 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:00,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-10-16 11:41:00,158 INFO L429 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:00,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:00,159 INFO L82 PathProgramCache]: Analyzing trace with hash -194773097, now seen corresponding path program 116 times [2020-10-16 11:41:00,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:00,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084811884] [2020-10-16 11:41:00,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:00,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:00,272 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:00,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084811884] [2020-10-16 11:41:00,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91100757] [2020-10-16 11:41:00,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:00,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:41:00,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:00,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:00,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:03,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:03,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:03,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:03,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133018567] [2020-10-16 11:41:03,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:03,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:03,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:03,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=189, Unknown=1, NotChecked=0, Total=272 [2020-10-16 11:41:03,462 INFO L87 Difference]: Start difference. First operand 157 states and 400 transitions. Second operand 17 states. [2020-10-16 11:41:07,639 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-16 11:41:07,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:07,874 INFO L93 Difference]: Finished difference Result 218 states and 517 transitions. [2020-10-16 11:41:07,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 11:41:07,875 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:07,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:07,876 INFO L225 Difference]: With dead ends: 218 [2020-10-16 11:41:07,876 INFO L226 Difference]: Without dead ends: 216 [2020-10-16 11:41:07,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=144, Invalid=317, Unknown=1, NotChecked=0, Total=462 [2020-10-16 11:41:07,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-16 11:41:07,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 156. [2020-10-16 11:41:07,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-16 11:41:07,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-10-16 11:41:07,879 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-10-16 11:41:07,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:07,880 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-10-16 11:41:07,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:07,880 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-10-16 11:41:07,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:07,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:07,881 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:08,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:08,089 INFO L429 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:08,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:08,089 INFO L82 PathProgramCache]: Analyzing trace with hash -194744267, now seen corresponding path program 117 times [2020-10-16 11:41:08,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:08,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295894396] [2020-10-16 11:41:08,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:08,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:08,218 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:08,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295894396] [2020-10-16 11:41:08,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842419239] [2020-10-16 11:41:08,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:08,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 11:41:08,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:08,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:08,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:08,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:08,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:08,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:08,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751636795] [2020-10-16 11:41:08,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:08,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:08,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:08,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:08,550 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-10-16 11:41:08,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:08,892 INFO L93 Difference]: Finished difference Result 212 states and 507 transitions. [2020-10-16 11:41:08,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 11:41:08,893 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:08,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:08,893 INFO L225 Difference]: With dead ends: 212 [2020-10-16 11:41:08,893 INFO L226 Difference]: Without dead ends: 210 [2020-10-16 11:41:08,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:41:08,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-16 11:41:08,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 153. [2020-10-16 11:41:08,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-16 11:41:08,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 388 transitions. [2020-10-16 11:41:08,896 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 388 transitions. Word has length 14 [2020-10-16 11:41:08,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:08,897 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 388 transitions. [2020-10-16 11:41:08,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:08,897 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 388 transitions. [2020-10-16 11:41:08,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:08,897 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:08,898 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:09,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2020-10-16 11:41:09,098 INFO L429 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:09,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:09,099 INFO L82 PathProgramCache]: Analyzing trace with hash -167068428, now seen corresponding path program 118 times [2020-10-16 11:41:09,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:09,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961456191] [2020-10-16 11:41:09,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:09,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:09,244 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:09,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961456191] [2020-10-16 11:41:09,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008464304] [2020-10-16 11:41:09,244 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:41:09,296 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:41:09,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:09,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:09,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:09,533 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:09,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:09,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:09,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129999396] [2020-10-16 11:41:09,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:09,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:09,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:09,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:09,534 INFO L87 Difference]: Start difference. First operand 153 states and 388 transitions. Second operand 17 states. [2020-10-16 11:41:09,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:09,896 INFO L93 Difference]: Finished difference Result 212 states and 504 transitions. [2020-10-16 11:41:09,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:41:09,897 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:09,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:09,898 INFO L225 Difference]: With dead ends: 212 [2020-10-16 11:41:09,898 INFO L226 Difference]: Without dead ends: 210 [2020-10-16 11:41:09,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=182, Invalid=418, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:41:09,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-16 11:41:09,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 156. [2020-10-16 11:41:09,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-16 11:41:09,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-10-16 11:41:09,901 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-10-16 11:41:09,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:09,902 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-10-16 11:41:09,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:09,902 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-10-16 11:41:09,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:09,902 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:09,902 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:10,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:10,103 INFO L429 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:10,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:10,104 INFO L82 PathProgramCache]: Analyzing trace with hash -167067467, now seen corresponding path program 119 times [2020-10-16 11:41:10,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:10,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331872358] [2020-10-16 11:41:10,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:10,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:10,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:10,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331872358] [2020-10-16 11:41:10,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738674378] [2020-10-16 11:41:10,227 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:10,265 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:41:10,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:10,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:10,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:10,473 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:10,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:10,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:10,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084678849] [2020-10-16 11:41:10,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:10,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:10,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:10,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:10,475 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-10-16 11:41:10,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:10,832 INFO L93 Difference]: Finished difference Result 224 states and 529 transitions. [2020-10-16 11:41:10,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:41:10,833 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:10,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:10,834 INFO L225 Difference]: With dead ends: 224 [2020-10-16 11:41:10,834 INFO L226 Difference]: Without dead ends: 222 [2020-10-16 11:41:10,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:41:10,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-16 11:41:10,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 156. [2020-10-16 11:41:10,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-16 11:41:10,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-10-16 11:41:10,838 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-10-16 11:41:10,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:10,838 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-10-16 11:41:10,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:10,838 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-10-16 11:41:10,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:10,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:10,839 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:11,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:11,039 INFO L429 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:11,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:11,040 INFO L82 PathProgramCache]: Analyzing trace with hash -167038637, now seen corresponding path program 120 times [2020-10-16 11:41:11,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:11,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264480270] [2020-10-16 11:41:11,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:11,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:11,156 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:11,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264480270] [2020-10-16 11:41:11,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510096801] [2020-10-16 11:41:11,157 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:11,196 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 11:41:11,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:11,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:11,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:11,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:11,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:11,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:11,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453656971] [2020-10-16 11:41:11,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:11,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:11,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:11,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:11,384 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-10-16 11:41:11,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:11,690 INFO L93 Difference]: Finished difference Result 218 states and 519 transitions. [2020-10-16 11:41:11,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:41:11,690 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:11,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:11,691 INFO L225 Difference]: With dead ends: 218 [2020-10-16 11:41:11,691 INFO L226 Difference]: Without dead ends: 216 [2020-10-16 11:41:11,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:41:11,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-16 11:41:11,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 156. [2020-10-16 11:41:11,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-16 11:41:11,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-10-16 11:41:11,694 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-10-16 11:41:11,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:11,694 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-10-16 11:41:11,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:11,694 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-10-16 11:41:11,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:11,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:11,695 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:11,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:11,897 INFO L429 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:11,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:11,897 INFO L82 PathProgramCache]: Analyzing trace with hash -166114155, now seen corresponding path program 121 times [2020-10-16 11:41:11,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:11,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552616105] [2020-10-16 11:41:11,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:11,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:12,016 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:12,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552616105] [2020-10-16 11:41:12,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979202145] [2020-10-16 11:41:12,017 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:12,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:12,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:12,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:12,243 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:12,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:12,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:12,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806104034] [2020-10-16 11:41:12,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:12,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:12,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:12,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:12,245 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-10-16 11:41:12,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:12,493 INFO L93 Difference]: Finished difference Result 206 states and 492 transitions. [2020-10-16 11:41:12,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:41:12,494 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:12,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:12,495 INFO L225 Difference]: With dead ends: 206 [2020-10-16 11:41:12,495 INFO L226 Difference]: Without dead ends: 204 [2020-10-16 11:41:12,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:41:12,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-16 11:41:12,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 154. [2020-10-16 11:41:12,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-16 11:41:12,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 389 transitions. [2020-10-16 11:41:12,498 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 389 transitions. Word has length 14 [2020-10-16 11:41:12,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:12,498 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 389 transitions. [2020-10-16 11:41:12,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:12,499 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 389 transitions. [2020-10-16 11:41:12,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:12,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:12,499 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:12,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:12,700 INFO L429 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:12,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:12,701 INFO L82 PathProgramCache]: Analyzing trace with hash 691806102, now seen corresponding path program 122 times [2020-10-16 11:41:12,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:12,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029008462] [2020-10-16 11:41:12,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:12,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:12,819 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:12,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029008462] [2020-10-16 11:41:12,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860336384] [2020-10-16 11:41:12,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:12,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:41:12,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:12,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:12,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:13,068 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:13,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:13,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:13,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214858628] [2020-10-16 11:41:13,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:13,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:13,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:13,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:13,070 INFO L87 Difference]: Start difference. First operand 154 states and 389 transitions. Second operand 17 states. [2020-10-16 11:41:13,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:13,549 INFO L93 Difference]: Finished difference Result 210 states and 502 transitions. [2020-10-16 11:41:13,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 11:41:13,551 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:13,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:13,552 INFO L225 Difference]: With dead ends: 210 [2020-10-16 11:41:13,552 INFO L226 Difference]: Without dead ends: 208 [2020-10-16 11:41:13,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=220, Invalid=536, Unknown=0, NotChecked=0, Total=756 [2020-10-16 11:41:13,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-16 11:41:13,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 159. [2020-10-16 11:41:13,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-16 11:41:13,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 403 transitions. [2020-10-16 11:41:13,556 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 403 transitions. Word has length 14 [2020-10-16 11:41:13,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:13,557 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 403 transitions. [2020-10-16 11:41:13,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:13,557 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 403 transitions. [2020-10-16 11:41:13,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:13,557 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:13,557 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:13,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-10-16 11:41:13,767 INFO L429 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:13,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:13,768 INFO L82 PathProgramCache]: Analyzing trace with hash 691807063, now seen corresponding path program 123 times [2020-10-16 11:41:13,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:13,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838510020] [2020-10-16 11:41:13,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:13,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:13,882 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:13,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838510020] [2020-10-16 11:41:13,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977823351] [2020-10-16 11:41:13,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:13,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 11:41:13,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:13,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:13,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:14,182 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:14,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:14,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:14,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350024499] [2020-10-16 11:41:14,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:14,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:14,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:14,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:14,185 INFO L87 Difference]: Start difference. First operand 159 states and 403 transitions. Second operand 17 states. [2020-10-16 11:41:14,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:14,829 INFO L93 Difference]: Finished difference Result 216 states and 515 transitions. [2020-10-16 11:41:14,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 11:41:14,831 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:14,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:14,832 INFO L225 Difference]: With dead ends: 216 [2020-10-16 11:41:14,832 INFO L226 Difference]: Without dead ends: 214 [2020-10-16 11:41:14,833 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-10-16 11:41:14,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-16 11:41:14,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 158. [2020-10-16 11:41:14,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-16 11:41:14,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 400 transitions. [2020-10-16 11:41:14,836 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 400 transitions. Word has length 14 [2020-10-16 11:41:14,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:14,836 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 400 transitions. [2020-10-16 11:41:14,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:14,836 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 400 transitions. [2020-10-16 11:41:14,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:14,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:14,837 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:15,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-10-16 11:41:15,046 INFO L429 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:15,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:15,047 INFO L82 PathProgramCache]: Analyzing trace with hash 691835893, now seen corresponding path program 124 times [2020-10-16 11:41:15,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:15,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659813446] [2020-10-16 11:41:15,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:15,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:15,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:15,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659813446] [2020-10-16 11:41:15,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301212725] [2020-10-16 11:41:15,175 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:15,212 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:41:15,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:15,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:15,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:15,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:15,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:15,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:15,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098252845] [2020-10-16 11:41:15,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:15,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:15,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:15,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:15,899 INFO L87 Difference]: Start difference. First operand 158 states and 400 transitions. Second operand 17 states. [2020-10-16 11:41:16,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:16,367 INFO L93 Difference]: Finished difference Result 227 states and 536 transitions. [2020-10-16 11:41:16,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 11:41:16,367 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:16,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:16,368 INFO L225 Difference]: With dead ends: 227 [2020-10-16 11:41:16,368 INFO L226 Difference]: Without dead ends: 225 [2020-10-16 11:41:16,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=209, Invalid=493, Unknown=0, NotChecked=0, Total=702 [2020-10-16 11:41:16,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-16 11:41:16,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 162. [2020-10-16 11:41:16,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-16 11:41:16,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 411 transitions. [2020-10-16 11:41:16,372 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 411 transitions. Word has length 14 [2020-10-16 11:41:16,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:16,372 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 411 transitions. [2020-10-16 11:41:16,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:16,372 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 411 transitions. [2020-10-16 11:41:16,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:16,372 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:16,373 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:16,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-10-16 11:41:16,574 INFO L429 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:16,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:16,574 INFO L82 PathProgramCache]: Analyzing trace with hash 692730584, now seen corresponding path program 125 times [2020-10-16 11:41:16,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:16,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644341930] [2020-10-16 11:41:16,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:16,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:16,688 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:16,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644341930] [2020-10-16 11:41:16,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054049128] [2020-10-16 11:41:16,689 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:16,732 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:41:16,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:16,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:16,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:16,912 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:16,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:16,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:16,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612428427] [2020-10-16 11:41:16,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:16,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:16,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:16,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:16,914 INFO L87 Difference]: Start difference. First operand 162 states and 411 transitions. Second operand 17 states. [2020-10-16 11:41:17,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:17,298 INFO L93 Difference]: Finished difference Result 219 states and 521 transitions. [2020-10-16 11:41:17,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 11:41:17,299 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:17,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:17,299 INFO L225 Difference]: With dead ends: 219 [2020-10-16 11:41:17,299 INFO L226 Difference]: Without dead ends: 217 [2020-10-16 11:41:17,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2020-10-16 11:41:17,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-10-16 11:41:17,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 161. [2020-10-16 11:41:17,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-16 11:41:17,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 407 transitions. [2020-10-16 11:41:17,304 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 407 transitions. Word has length 14 [2020-10-16 11:41:17,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:17,304 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 407 transitions. [2020-10-16 11:41:17,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:17,304 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 407 transitions. [2020-10-16 11:41:17,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:17,305 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:17,305 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:17,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-10-16 11:41:17,508 INFO L429 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:17,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:17,508 INFO L82 PathProgramCache]: Analyzing trace with hash 720435253, now seen corresponding path program 126 times [2020-10-16 11:41:17,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:17,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488227672] [2020-10-16 11:41:17,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:17,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:17,621 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:17,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488227672] [2020-10-16 11:41:17,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381374753] [2020-10-16 11:41:17,622 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:17,659 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 11:41:17,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:17,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:17,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:17,881 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:17,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:17,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:17,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125759979] [2020-10-16 11:41:17,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:17,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:17,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:17,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:17,883 INFO L87 Difference]: Start difference. First operand 161 states and 407 transitions. Second operand 17 states. [2020-10-16 11:41:18,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:18,280 INFO L93 Difference]: Finished difference Result 218 states and 517 transitions. [2020-10-16 11:41:18,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 11:41:18,282 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:18,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:18,282 INFO L225 Difference]: With dead ends: 218 [2020-10-16 11:41:18,282 INFO L226 Difference]: Without dead ends: 216 [2020-10-16 11:41:18,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=172, Invalid=428, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:41:18,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-16 11:41:18,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 160. [2020-10-16 11:41:18,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-16 11:41:18,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 404 transitions. [2020-10-16 11:41:18,286 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 404 transitions. Word has length 14 [2020-10-16 11:41:18,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:18,286 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 404 transitions. [2020-10-16 11:41:18,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:18,286 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 404 transitions. [2020-10-16 11:41:18,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:18,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:18,287 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:18,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:18,487 INFO L429 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:18,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:18,488 INFO L82 PathProgramCache]: Analyzing trace with hash 721388565, now seen corresponding path program 127 times [2020-10-16 11:41:18,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:18,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71465439] [2020-10-16 11:41:18,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:18,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:18,601 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:18,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71465439] [2020-10-16 11:41:18,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774450561] [2020-10-16 11:41:18,602 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:18,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:18,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:18,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:18,832 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:18,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:18,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:18,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735037049] [2020-10-16 11:41:18,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:18,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:18,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:18,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:18,834 INFO L87 Difference]: Start difference. First operand 160 states and 404 transitions. Second operand 17 states. [2020-10-16 11:41:19,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:19,142 INFO L93 Difference]: Finished difference Result 209 states and 498 transitions. [2020-10-16 11:41:19,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 11:41:19,142 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:19,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:19,143 INFO L225 Difference]: With dead ends: 209 [2020-10-16 11:41:19,143 INFO L226 Difference]: Without dead ends: 207 [2020-10-16 11:41:19,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:41:19,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-16 11:41:19,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 158. [2020-10-16 11:41:19,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-16 11:41:19,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 397 transitions. [2020-10-16 11:41:19,147 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 397 transitions. Word has length 14 [2020-10-16 11:41:19,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:19,147 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 397 transitions. [2020-10-16 11:41:19,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:19,147 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 397 transitions. [2020-10-16 11:41:19,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:19,147 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:19,147 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:19,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2020-10-16 11:41:19,348 INFO L429 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:19,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:19,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1998481017, now seen corresponding path program 128 times [2020-10-16 11:41:19,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:19,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247321844] [2020-10-16 11:41:19,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:19,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:19,537 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:19,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247321844] [2020-10-16 11:41:19,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617085732] [2020-10-16 11:41:19,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:19,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:41:19,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:19,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:19,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:19,756 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:19,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:19,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:19,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578274603] [2020-10-16 11:41:19,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:19,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:19,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:19,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:19,758 INFO L87 Difference]: Start difference. First operand 158 states and 397 transitions. Second operand 17 states. [2020-10-16 11:41:19,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:19,858 INFO L93 Difference]: Finished difference Result 212 states and 504 transitions. [2020-10-16 11:41:19,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:41:19,859 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:19,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:19,859 INFO L225 Difference]: With dead ends: 212 [2020-10-16 11:41:19,859 INFO L226 Difference]: Without dead ends: 210 [2020-10-16 11:41:19,860 INFO L677 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 [2020-10-16 11:41:19,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-16 11:41:19,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 166. [2020-10-16 11:41:19,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-16 11:41:19,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 421 transitions. [2020-10-16 11:41:19,863 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 421 transitions. Word has length 14 [2020-10-16 11:41:19,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:19,863 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 421 transitions. [2020-10-16 11:41:19,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:19,863 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 421 transitions. [2020-10-16 11:41:19,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:19,864 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:19,864 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:20,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:20,065 INFO L429 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:20,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:20,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1998480056, now seen corresponding path program 129 times [2020-10-16 11:41:20,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:20,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129197985] [2020-10-16 11:41:20,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:20,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:20,256 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:20,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129197985] [2020-10-16 11:41:20,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396836418] [2020-10-16 11:41:20,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:20,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 11:41:20,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:20,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:20,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:20,490 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:20,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:20,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:20,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929549405] [2020-10-16 11:41:20,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:20,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:20,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:20,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:20,492 INFO L87 Difference]: Start difference. First operand 166 states and 421 transitions. Second operand 17 states. [2020-10-16 11:41:20,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:20,609 INFO L93 Difference]: Finished difference Result 217 states and 513 transitions. [2020-10-16 11:41:20,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:41:20,610 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:20,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:20,611 INFO L225 Difference]: With dead ends: 217 [2020-10-16 11:41:20,611 INFO L226 Difference]: Without dead ends: 215 [2020-10-16 11:41:20,611 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:41:20,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-16 11:41:20,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 164. [2020-10-16 11:41:20,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-16 11:41:20,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 415 transitions. [2020-10-16 11:41:20,614 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 415 transitions. Word has length 14 [2020-10-16 11:41:20,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:20,614 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 415 transitions. [2020-10-16 11:41:20,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:20,614 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 415 transitions. [2020-10-16 11:41:20,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:20,615 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:20,615 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:20,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:20,816 INFO L429 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:20,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:20,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1998451226, now seen corresponding path program 130 times [2020-10-16 11:41:20,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:20,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054001359] [2020-10-16 11:41:20,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:20,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:20,977 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:20,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054001359] [2020-10-16 11:41:20,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608004091] [2020-10-16 11:41:20,978 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:21,016 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:41:21,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:21,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:21,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:21,287 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:21,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:21,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:21,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563310095] [2020-10-16 11:41:21,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:21,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:21,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:21,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:21,288 INFO L87 Difference]: Start difference. First operand 164 states and 415 transitions. Second operand 17 states. [2020-10-16 11:41:21,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:21,524 INFO L93 Difference]: Finished difference Result 227 states and 533 transitions. [2020-10-16 11:41:21,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:41:21,525 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:21,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:21,525 INFO L225 Difference]: With dead ends: 227 [2020-10-16 11:41:21,525 INFO L226 Difference]: Without dead ends: 225 [2020-10-16 11:41:21,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:41:21,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-16 11:41:21,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 162. [2020-10-16 11:41:21,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-16 11:41:21,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 409 transitions. [2020-10-16 11:41:21,530 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 409 transitions. Word has length 14 [2020-10-16 11:41:21,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:21,530 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 409 transitions. [2020-10-16 11:41:21,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:21,530 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 409 transitions. [2020-10-16 11:41:21,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:21,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:21,531 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:21,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:21,734 INFO L429 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:21,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:21,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1997557496, now seen corresponding path program 131 times [2020-10-16 11:41:21,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:21,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361477192] [2020-10-16 11:41:21,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:21,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:21,879 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:21,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361477192] [2020-10-16 11:41:21,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424255698] [2020-10-16 11:41:21,880 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:21,919 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:41:21,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:21,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:21,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:22,186 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:22,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:22,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:22,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563822092] [2020-10-16 11:41:22,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:22,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:22,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:22,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:22,187 INFO L87 Difference]: Start difference. First operand 162 states and 409 transitions. Second operand 17 states. [2020-10-16 11:41:22,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:22,556 INFO L93 Difference]: Finished difference Result 225 states and 529 transitions. [2020-10-16 11:41:22,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 11:41:22,557 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:22,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:22,558 INFO L225 Difference]: With dead ends: 225 [2020-10-16 11:41:22,558 INFO L226 Difference]: Without dead ends: 223 [2020-10-16 11:41:22,558 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=150, Invalid=356, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:41:22,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-16 11:41:22,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 164. [2020-10-16 11:41:22,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-16 11:41:22,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 415 transitions. [2020-10-16 11:41:22,562 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 415 transitions. Word has length 14 [2020-10-16 11:41:22,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:22,562 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 415 transitions. [2020-10-16 11:41:22,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:22,562 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 415 transitions. [2020-10-16 11:41:22,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:22,562 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:22,562 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:22,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable164 [2020-10-16 11:41:22,763 INFO L429 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:22,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:22,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1997556535, now seen corresponding path program 132 times [2020-10-16 11:41:22,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:22,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599334344] [2020-10-16 11:41:22,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:22,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:22,920 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:22,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599334344] [2020-10-16 11:41:22,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927167299] [2020-10-16 11:41:22,921 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:22,958 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:41:22,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:22,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:22,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:27,144 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:27,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:27,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:27,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686053546] [2020-10-16 11:41:27,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:27,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:27,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:27,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=200, Unknown=1, NotChecked=0, Total=272 [2020-10-16 11:41:27,145 INFO L87 Difference]: Start difference. First operand 164 states and 415 transitions. Second operand 17 states. [2020-10-16 11:41:31,363 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-16 11:41:31,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:31,615 INFO L93 Difference]: Finished difference Result 233 states and 545 transitions. [2020-10-16 11:41:31,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:41:31,616 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:31,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:31,616 INFO L225 Difference]: With dead ends: 233 [2020-10-16 11:41:31,616 INFO L226 Difference]: Without dead ends: 231 [2020-10-16 11:41:31,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=146, Invalid=359, Unknown=1, NotChecked=0, Total=506 [2020-10-16 11:41:31,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-16 11:41:31,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 163. [2020-10-16 11:41:31,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-16 11:41:31,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-10-16 11:41:31,621 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-10-16 11:41:31,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:31,621 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-10-16 11:41:31,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:31,621 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-10-16 11:41:31,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:31,621 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:31,621 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:31,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:31,822 INFO L429 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:31,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:31,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1997527705, now seen corresponding path program 133 times [2020-10-16 11:41:31,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:31,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757031958] [2020-10-16 11:41:31,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:31,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:31,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:31,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757031958] [2020-10-16 11:41:31,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114312610] [2020-10-16 11:41:31,974 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:32,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:32,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:32,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:32,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:32,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:32,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:32,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543639644] [2020-10-16 11:41:32,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:32,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:32,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:32,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:32,293 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-10-16 11:41:32,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:32,653 INFO L93 Difference]: Finished difference Result 225 states and 533 transitions. [2020-10-16 11:41:32,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:41:32,654 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:32,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:32,655 INFO L225 Difference]: With dead ends: 225 [2020-10-16 11:41:32,655 INFO L226 Difference]: Without dead ends: 223 [2020-10-16 11:41:32,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:41:32,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-16 11:41:32,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 160. [2020-10-16 11:41:32,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-16 11:41:32,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 403 transitions. [2020-10-16 11:41:32,658 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 403 transitions. Word has length 14 [2020-10-16 11:41:32,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:32,659 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 403 transitions. [2020-10-16 11:41:32,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:32,659 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 403 transitions. [2020-10-16 11:41:32,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:32,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:32,659 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:32,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-10-16 11:41:32,860 INFO L429 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:32,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:32,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1969851866, now seen corresponding path program 134 times [2020-10-16 11:41:32,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:32,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801872458] [2020-10-16 11:41:32,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:32,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:33,005 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:33,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801872458] [2020-10-16 11:41:33,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259911310] [2020-10-16 11:41:33,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:33,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:41:33,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:33,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:33,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:33,373 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:33,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:33,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:33,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857696881] [2020-10-16 11:41:33,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:33,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:33,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:33,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:33,376 INFO L87 Difference]: Start difference. First operand 160 states and 403 transitions. Second operand 17 states. [2020-10-16 11:41:33,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:33,862 INFO L93 Difference]: Finished difference Result 225 states and 529 transitions. [2020-10-16 11:41:33,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:41:33,863 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:33,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:33,864 INFO L225 Difference]: With dead ends: 225 [2020-10-16 11:41:33,864 INFO L226 Difference]: Without dead ends: 223 [2020-10-16 11:41:33,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=183, Invalid=467, Unknown=0, NotChecked=0, Total=650 [2020-10-16 11:41:33,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-16 11:41:33,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 163. [2020-10-16 11:41:33,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-16 11:41:33,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-10-16 11:41:33,868 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-10-16 11:41:33,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:33,868 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-10-16 11:41:33,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:33,869 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-10-16 11:41:33,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:33,869 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:33,869 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:34,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:34,070 INFO L429 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:34,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:34,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1969850905, now seen corresponding path program 135 times [2020-10-16 11:41:34,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:34,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237334142] [2020-10-16 11:41:34,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:34,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:34,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:34,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237334142] [2020-10-16 11:41:34,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873209096] [2020-10-16 11:41:34,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:34,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 11:41:34,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:34,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:34,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:34,485 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:34,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:34,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:34,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429924431] [2020-10-16 11:41:34,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:34,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:34,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:34,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:34,487 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-10-16 11:41:34,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:34,911 INFO L93 Difference]: Finished difference Result 235 states and 549 transitions. [2020-10-16 11:41:34,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 11:41:34,912 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:34,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:34,913 INFO L225 Difference]: With dead ends: 235 [2020-10-16 11:41:34,913 INFO L226 Difference]: Without dead ends: 233 [2020-10-16 11:41:34,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2020-10-16 11:41:34,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-16 11:41:34,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 163. [2020-10-16 11:41:34,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-16 11:41:34,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-10-16 11:41:34,917 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-10-16 11:41:34,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:34,917 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-10-16 11:41:34,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:34,917 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-10-16 11:41:34,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:34,917 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:34,917 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:35,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-10-16 11:41:35,118 INFO L429 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:35,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:35,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1969822075, now seen corresponding path program 136 times [2020-10-16 11:41:35,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:35,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653198546] [2020-10-16 11:41:35,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:35,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2020-10-16 11:41:35,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2020-10-16 11:41:35,252 WARN L546 AbstractCegarLoop]: Verification canceled [2020-10-16 11:41:35,255 WARN L235 ceAbstractionStarter]: Timeout [2020-10-16 11:41:35,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 11:41:35 BasicIcfg [2020-10-16 11:41:35,255 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-16 11:41:35,257 INFO L168 Benchmark]: Toolchain (without parser) took 275264.40 ms. Allocated memory was 137.9 MB in the beginning and 205.0 MB in the end (delta: 67.1 MB). Free memory was 99.8 MB in the beginning and 97.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 69.2 MB. Max. memory is 7.1 GB. [2020-10-16 11:41:35,257 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 137.9 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-10-16 11:41:35,257 INFO L168 Benchmark]: CACSL2BoogieTranslator took 706.26 ms. Allocated memory was 137.9 MB in the beginning and 200.3 MB in the end (delta: 62.4 MB). Free memory was 99.6 MB in the beginning and 160.3 MB in the end (delta: -60.7 MB). Peak memory consumption was 26.3 MB. Max. memory is 7.1 GB. [2020-10-16 11:41:35,257 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.78 ms. Allocated memory is still 200.3 MB. Free memory was 160.3 MB in the beginning and 158.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-10-16 11:41:35,258 INFO L168 Benchmark]: Boogie Preprocessor took 31.25 ms. Allocated memory is still 200.3 MB. Free memory was 158.3 MB in the beginning and 156.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-10-16 11:41:35,258 INFO L168 Benchmark]: RCFGBuilder took 446.44 ms. Allocated memory is still 200.3 MB. Free memory was 156.3 MB in the beginning and 136.1 MB in the end (delta: 20.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 7.1 GB. [2020-10-16 11:41:35,258 INFO L168 Benchmark]: TraceAbstraction took 274020.75 ms. Allocated memory was 200.3 MB in the beginning and 205.0 MB in the end (delta: 4.7 MB). Free memory was 135.4 MB in the beginning and 97.7 MB in the end (delta: 37.7 MB). Peak memory consumption was 42.4 MB. Max. memory is 7.1 GB. [2020-10-16 11:41:35,260 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 137.9 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 706.26 ms. Allocated memory was 137.9 MB in the beginning and 200.3 MB in the end (delta: 62.4 MB). Free memory was 99.6 MB in the beginning and 160.3 MB in the end (delta: -60.7 MB). Peak memory consumption was 26.3 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 52.78 ms. Allocated memory is still 200.3 MB. Free memory was 160.3 MB in the beginning and 158.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 31.25 ms. Allocated memory is still 200.3 MB. Free memory was 158.3 MB in the beginning and 156.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 446.44 ms. Allocated memory is still 200.3 MB. Free memory was 156.3 MB in the beginning and 136.1 MB in the end (delta: 20.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 274020.75 ms. Allocated memory was 200.3 MB in the beginning and 205.0 MB in the end (delta: 4.7 MB). Free memory was 135.4 MB in the beginning and 97.7 MB in the end (delta: 37.7 MB). Peak memory consumption was 42.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 582 VarBasedMoverChecksPositive, 14 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 21 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.2s, 59 PlacesBefore, 20 PlacesAfterwards, 57 TransitionsBefore, 15 TransitionsAfterwards, 1032 CoEnabledTransitionPairs, 5 FixpointIterations, 12 TrivialSequentialCompositions, 26 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 9 ConcurrentYvCompositions, 3 ChoiceCompositions, 50 TotalNumberOfCompositions, 1052 MoverChecksTotal - TimeoutResultAtElement [Line: 712]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 712). Cancelled while BasicCegarLoop was analyzing trace of length 15 with TraceHistMax 3,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateComparison was comparing new predicate (quantifier-free) to 9 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 53 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 273.9s, OverallIterations: 170, TraceHistogramMax: 6, AutomataDifference: 179.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.2s, HoareTripleCheckerStatistics: 2350 SDtfs, 16325 SDslu, 16420 SDs, 0 SdLazy, 12568 SolverSat, 3913 SolverUnsat, 31 SolverUnknown, 0 SolverNotchecked, 69.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4439 GetRequests, 799 SyntacticMatches, 143 SemanticMatches, 3497 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20654 ImplicationChecksByTransitivity, 148.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=166occurred in iteration=162, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 169 MinimizatonAttempts, 7646 StatesRemovedByMinimization, 169 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.9s SsaConstructionTime, 2.4s SatisfiabilityAnalysisTime, 49.6s InterpolantComputationTime, 4100 NumberOfCodeBlocks, 4100 NumberOfCodeBlocksAsserted, 512 NumberOfCheckSat, 3769 ConstructedInterpolants, 8 QuantifiedInterpolants, 387395 SizeOfPredicates, 162 NumberOfNonLiveVariables, 13958 ConjunctsInSsa, 1566 ConjunctsInUnsatCore, 331 InterpolantComputations, 7 PerfectInterpolantSequences, 0/1550 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