/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/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 17:13:44,427 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 17:13:44,430 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 17:13:44,467 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 17:13:44,467 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 17:13:44,475 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 17:13:44,478 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 17:13:44,481 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 17:13:44,483 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 17:13:44,486 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 17:13:44,486 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 17:13:44,487 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 17:13:44,487 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 17:13:44,490 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 17:13:44,492 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 17:13:44,493 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 17:13:44,495 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 17:13:44,496 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 17:13:44,497 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 17:13:44,504 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 17:13:44,506 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 17:13:44,507 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 17:13:44,508 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 17:13:44,509 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 17:13:44,520 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 17:13:44,535 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 17:13:44,538 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 17:13:44,538 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 17:13:44,539 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-22 17:13:44,578 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 17:13:44,578 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 17:13:44,581 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 17:13:44,581 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 17:13:44,581 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 17:13:44,581 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 17:13:44,581 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 17:13:44,582 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 17:13:44,582 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 17:13:44,583 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 17:13:44,584 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 17:13:44,584 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 17:13:44,584 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 17:13:44,584 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 17:13:44,585 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 17:13:44,585 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 17:13:44,585 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 17:13:44,585 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 17:13:44,585 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 17:13:44,586 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 17:13:44,586 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 17:13:44,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 17:13:44,586 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 17:13:44,587 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 17:13:44,587 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 17:13:44,587 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 17:13:44,587 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 17:13:44,588 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 17:13:44,588 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 17:13:44,588 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-08-22 17:13:44,853 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 17:13:44,864 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 17:13:44,867 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 17:13:44,868 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 17:13:44,869 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 17:13:44,870 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-08-22 17:13:44,937 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef65869a6/465332ea26e448a0988eb8a30a9ad9e0/FLAGc6e28881d [2020-08-22 17:13:45,563 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 17:13:45,564 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-08-22 17:13:45,589 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef65869a6/465332ea26e448a0988eb8a30a9ad9e0/FLAGc6e28881d [2020-08-22 17:13:45,931 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef65869a6/465332ea26e448a0988eb8a30a9ad9e0 [2020-08-22 17:13:45,942 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 17:13:45,945 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 17:13:45,946 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 17:13:45,946 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 17:13:45,950 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 17:13:45,951 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 05:13:45" (1/1) ... [2020-08-22 17:13:45,954 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7420d2f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:13:45, skipping insertion in model container [2020-08-22 17:13:45,954 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 05:13:45" (1/1) ... [2020-08-22 17:13:45,962 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 17:13:46,076 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 17:13:47,104 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 17:13:47,123 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 17:13:47,781 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 17:13:47,815 INFO L208 MainTranslator]: Completed translation [2020-08-22 17:13:47,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:13:47 WrapperNode [2020-08-22 17:13:47,817 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 17:13:47,818 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 17:13:47,818 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 17:13:47,818 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 17:13:47,838 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:13:47" (1/1) ... [2020-08-22 17:13:47,838 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:13:47" (1/1) ... [2020-08-22 17:13:47,891 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:13:47" (1/1) ... [2020-08-22 17:13:47,893 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:13:47" (1/1) ... [2020-08-22 17:13:47,963 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:13:47" (1/1) ... [2020-08-22 17:13:47,996 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:13:47" (1/1) ... [2020-08-22 17:13:48,006 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:13:47" (1/1) ... [2020-08-22 17:13:48,017 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 17:13:48,018 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 17:13:48,018 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 17:13:48,018 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 17:13:48,020 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:13:47" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 17:13:48,116 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 17:13:48,116 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 17:13:48,116 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 17:13:48,116 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 17:13:48,117 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 17:13:48,117 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-22 17:13:48,117 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-22 17:13:48,117 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-08-22 17:13:48,117 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 17:13:48,118 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 17:13:48,118 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-08-22 17:13:48,119 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-08-22 17:13:48,119 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-08-22 17:13:48,120 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-08-22 17:13:48,120 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-08-22 17:13:48,121 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-08-22 17:13:48,121 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-22 17:13:48,121 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-22 17:13:48,121 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 17:13:48,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 17:13:48,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 17:13:50,492 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 17:13:50,493 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 17:13:50,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 05:13:50 BoogieIcfgContainer [2020-08-22 17:13:50,508 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 17:13:50,509 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 17:13:50,510 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 17:13:50,514 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 17:13:50,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 05:13:45" (1/3) ... [2020-08-22 17:13:50,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@462b8096 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 05:13:50, skipping insertion in model container [2020-08-22 17:13:50,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:13:47" (2/3) ... [2020-08-22 17:13:50,516 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@462b8096 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 05:13:50, skipping insertion in model container [2020-08-22 17:13:50,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 05:13:50" (3/3) ... [2020-08-22 17:13:50,519 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-08-22 17:13:50,527 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-08-22 17:13:50,535 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 17:13:50,549 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 17:13:50,575 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 17:13:50,575 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 17:13:50,575 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-08-22 17:13:50,575 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 17:13:50,576 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 17:13:50,576 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 17:13:50,576 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 17:13:50,576 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 17:13:50,634 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states. [2020-08-22 17:13:50,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-08-22 17:13:50,666 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:13:50,668 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:13:50,668 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:13:50,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:13:50,675 INFO L82 PathProgramCache]: Analyzing trace with hash -2046950044, now seen corresponding path program 1 times [2020-08-22 17:13:50,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:13:50,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061777624] [2020-08-22 17:13:50,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:13:51,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:13:53,052 WARN L193 SmtUtils]: Spent 823.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-22 17:13:53,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:13:53,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:13:53,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:13:53,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061777624] [2020-08-22 17:13:53,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:13:53,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 17:13:53,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131231824] [2020-08-22 17:13:53,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 17:13:53,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:13:53,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 17:13:53,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 17:13:53,401 INFO L87 Difference]: Start difference. First operand 795 states. Second operand 5 states. [2020-08-22 17:14:01,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:14:01,199 INFO L93 Difference]: Finished difference Result 2333 states and 4147 transitions. [2020-08-22 17:14:01,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 17:14:01,202 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 324 [2020-08-22 17:14:01,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:14:01,238 INFO L225 Difference]: With dead ends: 2333 [2020-08-22 17:14:01,239 INFO L226 Difference]: Without dead ends: 1545 [2020-08-22 17:14:01,248 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 17:14:01,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1545 states. [2020-08-22 17:14:01,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1545 to 1543. [2020-08-22 17:14:01,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1543 states. [2020-08-22 17:14:01,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 2401 transitions. [2020-08-22 17:14:01,443 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 2401 transitions. Word has length 324 [2020-08-22 17:14:01,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:14:01,444 INFO L479 AbstractCegarLoop]: Abstraction has 1543 states and 2401 transitions. [2020-08-22 17:14:01,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 17:14:01,445 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 2401 transitions. [2020-08-22 17:14:01,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-08-22 17:14:01,456 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:14:01,457 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:14:01,457 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 17:14:01,458 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:14:01,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:14:01,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1516440759, now seen corresponding path program 1 times [2020-08-22 17:14:01,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:14:01,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014480619] [2020-08-22 17:14:01,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:14:01,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:14:02,204 WARN L193 SmtUtils]: Spent 411.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-22 17:14:02,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:14:02,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:14:02,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:14:02,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014480619] [2020-08-22 17:14:02,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:14:02,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:14:02,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422040433] [2020-08-22 17:14:02,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:14:02,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:14:02,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:14:02,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:14:02,566 INFO L87 Difference]: Start difference. First operand 1543 states and 2401 transitions. Second operand 4 states. [2020-08-22 17:14:10,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:14:10,588 INFO L93 Difference]: Finished difference Result 4438 states and 6875 transitions. [2020-08-22 17:14:10,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:14:10,589 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-08-22 17:14:10,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:14:10,605 INFO L225 Difference]: With dead ends: 4438 [2020-08-22 17:14:10,606 INFO L226 Difference]: Without dead ends: 3024 [2020-08-22 17:14:10,610 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:14:10,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3024 states. [2020-08-22 17:14:10,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3024 to 3022. [2020-08-22 17:14:10,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3022 states. [2020-08-22 17:14:10,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3022 states to 3022 states and 4679 transitions. [2020-08-22 17:14:10,734 INFO L78 Accepts]: Start accepts. Automaton has 3022 states and 4679 transitions. Word has length 326 [2020-08-22 17:14:10,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:14:10,735 INFO L479 AbstractCegarLoop]: Abstraction has 3022 states and 4679 transitions. [2020-08-22 17:14:10,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:14:10,735 INFO L276 IsEmpty]: Start isEmpty. Operand 3022 states and 4679 transitions. [2020-08-22 17:14:10,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-08-22 17:14:10,745 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:14:10,746 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:14:10,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 17:14:10,746 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:14:10,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:14:10,747 INFO L82 PathProgramCache]: Analyzing trace with hash -545695684, now seen corresponding path program 1 times [2020-08-22 17:14:10,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:14:10,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708955432] [2020-08-22 17:14:10,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:14:10,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:14:11,330 WARN L193 SmtUtils]: Spent 456.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-22 17:14:11,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:14:11,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:14:11,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:14:11,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708955432] [2020-08-22 17:14:11,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:14:11,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:14:11,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477694953] [2020-08-22 17:14:11,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:14:11,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:14:11,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:14:11,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:14:11,457 INFO L87 Difference]: Start difference. First operand 3022 states and 4679 transitions. Second operand 4 states. [2020-08-22 17:14:19,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:14:19,434 INFO L93 Difference]: Finished difference Result 8991 states and 13913 transitions. [2020-08-22 17:14:19,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:14:19,434 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-08-22 17:14:19,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:14:19,462 INFO L225 Difference]: With dead ends: 8991 [2020-08-22 17:14:19,462 INFO L226 Difference]: Without dead ends: 6011 [2020-08-22 17:14:19,469 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:14:19,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6011 states. [2020-08-22 17:14:19,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6011 to 3041. [2020-08-22 17:14:19,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3041 states. [2020-08-22 17:14:19,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3041 states to 3041 states and 4707 transitions. [2020-08-22 17:14:19,620 INFO L78 Accepts]: Start accepts. Automaton has 3041 states and 4707 transitions. Word has length 326 [2020-08-22 17:14:19,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:14:19,620 INFO L479 AbstractCegarLoop]: Abstraction has 3041 states and 4707 transitions. [2020-08-22 17:14:19,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:14:19,621 INFO L276 IsEmpty]: Start isEmpty. Operand 3041 states and 4707 transitions. [2020-08-22 17:14:19,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-08-22 17:14:19,631 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:14:19,631 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:14:19,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 17:14:19,632 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:14:19,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:14:19,632 INFO L82 PathProgramCache]: Analyzing trace with hash -441096328, now seen corresponding path program 1 times [2020-08-22 17:14:19,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:14:19,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930709003] [2020-08-22 17:14:19,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:14:19,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:14:20,177 WARN L193 SmtUtils]: Spent 400.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-22 17:14:20,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:14:20,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:14:20,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:14:20,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930709003] [2020-08-22 17:14:20,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:14:20,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:14:20,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523027144] [2020-08-22 17:14:20,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:14:20,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:14:20,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:14:20,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:14:20,285 INFO L87 Difference]: Start difference. First operand 3041 states and 4707 transitions. Second operand 4 states. [2020-08-22 17:14:27,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:14:27,788 INFO L93 Difference]: Finished difference Result 9010 states and 13934 transitions. [2020-08-22 17:14:27,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:14:27,789 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 327 [2020-08-22 17:14:27,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:14:27,812 INFO L225 Difference]: With dead ends: 9010 [2020-08-22 17:14:27,812 INFO L226 Difference]: Without dead ends: 6029 [2020-08-22 17:14:27,818 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:14:27,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6029 states. [2020-08-22 17:14:27,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6029 to 3059. [2020-08-22 17:14:27,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3059 states. [2020-08-22 17:14:27,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3059 states to 3059 states and 4728 transitions. [2020-08-22 17:14:27,963 INFO L78 Accepts]: Start accepts. Automaton has 3059 states and 4728 transitions. Word has length 327 [2020-08-22 17:14:27,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:14:27,964 INFO L479 AbstractCegarLoop]: Abstraction has 3059 states and 4728 transitions. [2020-08-22 17:14:27,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:14:27,964 INFO L276 IsEmpty]: Start isEmpty. Operand 3059 states and 4728 transitions. [2020-08-22 17:14:27,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-08-22 17:14:27,973 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:14:27,973 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:14:27,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 17:14:27,974 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:14:27,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:14:27,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1648776142, now seen corresponding path program 1 times [2020-08-22 17:14:27,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:14:27,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951504999] [2020-08-22 17:14:27,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:14:28,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:14:28,623 WARN L193 SmtUtils]: Spent 379.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-22 17:14:28,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:14:28,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:14:28,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:14:28,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951504999] [2020-08-22 17:14:28,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:14:28,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:14:28,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74822388] [2020-08-22 17:14:28,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:14:28,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:14:28,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:14:28,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:14:28,822 INFO L87 Difference]: Start difference. First operand 3059 states and 4728 transitions. Second operand 4 states. [2020-08-22 17:14:36,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:14:36,295 INFO L93 Difference]: Finished difference Result 8718 states and 13409 transitions. [2020-08-22 17:14:36,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:14:36,296 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-08-22 17:14:36,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:14:36,319 INFO L225 Difference]: With dead ends: 8718 [2020-08-22 17:14:36,319 INFO L226 Difference]: Without dead ends: 5904 [2020-08-22 17:14:36,326 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:14:36,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5904 states. [2020-08-22 17:14:36,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5904 to 5902. [2020-08-22 17:14:36,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5902 states. [2020-08-22 17:14:36,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5902 states to 5902 states and 9056 transitions. [2020-08-22 17:14:36,565 INFO L78 Accepts]: Start accepts. Automaton has 5902 states and 9056 transitions. Word has length 328 [2020-08-22 17:14:36,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:14:36,567 INFO L479 AbstractCegarLoop]: Abstraction has 5902 states and 9056 transitions. [2020-08-22 17:14:36,567 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:14:36,567 INFO L276 IsEmpty]: Start isEmpty. Operand 5902 states and 9056 transitions. [2020-08-22 17:14:36,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-08-22 17:14:36,579 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:14:36,579 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:14:36,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 17:14:36,580 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:14:36,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:14:36,580 INFO L82 PathProgramCache]: Analyzing trace with hash 157244175, now seen corresponding path program 1 times [2020-08-22 17:14:36,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:14:36,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611942580] [2020-08-22 17:14:36,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:14:36,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:14:37,442 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-22 17:14:37,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:14:37,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:14:37,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:14:37,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611942580] [2020-08-22 17:14:37,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:14:37,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 17:14:37,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476629383] [2020-08-22 17:14:37,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 17:14:37,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:14:37,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 17:14:37,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 17:14:37,559 INFO L87 Difference]: Start difference. First operand 5902 states and 9056 transitions. Second operand 5 states. [2020-08-22 17:14:42,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:14:42,994 INFO L93 Difference]: Finished difference Result 13189 states and 20201 transitions. [2020-08-22 17:14:42,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 17:14:42,995 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 328 [2020-08-22 17:14:42,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:14:43,020 INFO L225 Difference]: With dead ends: 13189 [2020-08-22 17:14:43,021 INFO L226 Difference]: Without dead ends: 6775 [2020-08-22 17:14:43,032 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 17:14:43,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6775 states. [2020-08-22 17:14:43,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6775 to 6773. [2020-08-22 17:14:43,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6773 states. [2020-08-22 17:14:43,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6773 states to 6773 states and 10350 transitions. [2020-08-22 17:14:43,354 INFO L78 Accepts]: Start accepts. Automaton has 6773 states and 10350 transitions. Word has length 328 [2020-08-22 17:14:43,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:14:43,355 INFO L479 AbstractCegarLoop]: Abstraction has 6773 states and 10350 transitions. [2020-08-22 17:14:43,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 17:14:43,355 INFO L276 IsEmpty]: Start isEmpty. Operand 6773 states and 10350 transitions. [2020-08-22 17:14:43,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-08-22 17:14:43,369 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:14:43,370 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:14:43,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 17:14:43,370 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:14:43,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:14:43,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1619567406, now seen corresponding path program 1 times [2020-08-22 17:14:43,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:14:43,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548795289] [2020-08-22 17:14:43,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:14:43,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:14:43,871 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-22 17:14:43,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:14:43,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:14:43,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:14:43,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548795289] [2020-08-22 17:14:43,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:14:43,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:14:43,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980147968] [2020-08-22 17:14:43,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:14:43,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:14:43,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:14:43,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:14:43,968 INFO L87 Difference]: Start difference. First operand 6773 states and 10350 transitions. Second operand 4 states. [2020-08-22 17:14:48,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:14:48,368 INFO L93 Difference]: Finished difference Result 19447 states and 29573 transitions. [2020-08-22 17:14:48,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:14:48,369 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-08-22 17:14:48,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:14:48,399 INFO L225 Difference]: With dead ends: 19447 [2020-08-22 17:14:48,399 INFO L226 Difference]: Without dead ends: 13127 [2020-08-22 17:14:48,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:14:48,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13127 states. [2020-08-22 17:14:48,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13127 to 6831. [2020-08-22 17:14:48,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6831 states. [2020-08-22 17:14:48,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6831 states to 6831 states and 10425 transitions. [2020-08-22 17:14:48,718 INFO L78 Accepts]: Start accepts. Automaton has 6831 states and 10425 transitions. Word has length 330 [2020-08-22 17:14:48,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:14:48,718 INFO L479 AbstractCegarLoop]: Abstraction has 6831 states and 10425 transitions. [2020-08-22 17:14:48,719 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:14:48,719 INFO L276 IsEmpty]: Start isEmpty. Operand 6831 states and 10425 transitions. [2020-08-22 17:14:48,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-08-22 17:14:48,730 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:14:48,730 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:14:48,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 17:14:48,730 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:14:48,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:14:48,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1432284472, now seen corresponding path program 1 times [2020-08-22 17:14:48,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:14:48,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026721911] [2020-08-22 17:14:48,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:14:48,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:14:49,396 WARN L193 SmtUtils]: Spent 460.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-22 17:14:49,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:14:49,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:14:49,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:14:49,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026721911] [2020-08-22 17:14:49,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:14:49,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:14:49,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646354178] [2020-08-22 17:14:49,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:14:49,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:14:49,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:14:49,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:14:49,542 INFO L87 Difference]: Start difference. First operand 6831 states and 10425 transitions. Second operand 4 states. [2020-08-22 17:14:57,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:14:57,346 INFO L93 Difference]: Finished difference Result 19896 states and 30288 transitions. [2020-08-22 17:14:57,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:14:57,347 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-08-22 17:14:57,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:14:57,375 INFO L225 Difference]: With dead ends: 19896 [2020-08-22 17:14:57,375 INFO L226 Difference]: Without dead ends: 13350 [2020-08-22 17:14:57,385 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:14:57,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13350 states. [2020-08-22 17:14:57,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13350 to 13348. [2020-08-22 17:14:57,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13348 states. [2020-08-22 17:14:57,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13348 states to 13348 states and 20240 transitions. [2020-08-22 17:14:57,892 INFO L78 Accepts]: Start accepts. Automaton has 13348 states and 20240 transitions. Word has length 330 [2020-08-22 17:14:57,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:14:57,893 INFO L479 AbstractCegarLoop]: Abstraction has 13348 states and 20240 transitions. [2020-08-22 17:14:57,893 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:14:57,893 INFO L276 IsEmpty]: Start isEmpty. Operand 13348 states and 20240 transitions. [2020-08-22 17:14:57,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-08-22 17:14:57,911 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:14:57,911 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:14:57,911 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 17:14:57,911 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:14:57,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:14:57,912 INFO L82 PathProgramCache]: Analyzing trace with hash -491858715, now seen corresponding path program 1 times [2020-08-22 17:14:57,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:14:57,912 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468885618] [2020-08-22 17:14:57,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:14:58,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:14:58,735 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-22 17:14:58,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:14:58,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:14:58,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:14:58,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468885618] [2020-08-22 17:14:58,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:14:58,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 17:14:58,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400689706] [2020-08-22 17:14:58,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 17:14:58,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:14:58,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 17:14:58,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 17:14:58,951 INFO L87 Difference]: Start difference. First operand 13348 states and 20240 transitions. Second operand 5 states. [2020-08-22 17:15:05,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:15:05,056 INFO L93 Difference]: Finished difference Result 30452 states and 45989 transitions. [2020-08-22 17:15:05,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 17:15:05,056 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 330 [2020-08-22 17:15:05,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:15:05,088 INFO L225 Difference]: With dead ends: 30452 [2020-08-22 17:15:05,089 INFO L226 Difference]: Without dead ends: 15894 [2020-08-22 17:15:05,108 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 17:15:05,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15894 states. [2020-08-22 17:15:05,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15894 to 15892. [2020-08-22 17:15:05,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15892 states. [2020-08-22 17:15:05,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15892 states to 15892 states and 23961 transitions. [2020-08-22 17:15:05,744 INFO L78 Accepts]: Start accepts. Automaton has 15892 states and 23961 transitions. Word has length 330 [2020-08-22 17:15:05,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:15:05,744 INFO L479 AbstractCegarLoop]: Abstraction has 15892 states and 23961 transitions. [2020-08-22 17:15:05,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 17:15:05,744 INFO L276 IsEmpty]: Start isEmpty. Operand 15892 states and 23961 transitions. [2020-08-22 17:15:05,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-08-22 17:15:05,762 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:15:05,762 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:15:05,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 17:15:05,763 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:15:05,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:15:05,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1136318819, now seen corresponding path program 1 times [2020-08-22 17:15:05,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:15:05,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395430477] [2020-08-22 17:15:05,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:15:06,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:15:06,781 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-22 17:15:06,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:15:06,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:15:06,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:15:06,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395430477] [2020-08-22 17:15:06,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:15:06,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 17:15:06,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745910000] [2020-08-22 17:15:06,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 17:15:06,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:15:06,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 17:15:06,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 17:15:06,874 INFO L87 Difference]: Start difference. First operand 15892 states and 23961 transitions. Second operand 5 states. [2020-08-22 17:15:15,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:15:15,922 INFO L93 Difference]: Finished difference Result 41545 states and 62089 transitions. [2020-08-22 17:15:15,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 17:15:15,923 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 330 [2020-08-22 17:15:15,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:15:15,965 INFO L225 Difference]: With dead ends: 41545 [2020-08-22 17:15:15,966 INFO L226 Difference]: Without dead ends: 27789 [2020-08-22 17:15:15,988 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 17:15:16,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27789 states. [2020-08-22 17:15:16,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27789 to 16491. [2020-08-22 17:15:16,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16491 states. [2020-08-22 17:15:16,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16491 states to 16491 states and 24849 transitions. [2020-08-22 17:15:16,668 INFO L78 Accepts]: Start accepts. Automaton has 16491 states and 24849 transitions. Word has length 330 [2020-08-22 17:15:16,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:15:16,669 INFO L479 AbstractCegarLoop]: Abstraction has 16491 states and 24849 transitions. [2020-08-22 17:15:16,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 17:15:16,669 INFO L276 IsEmpty]: Start isEmpty. Operand 16491 states and 24849 transitions. [2020-08-22 17:15:16,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-08-22 17:15:16,688 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:15:16,688 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:15:16,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 17:15:16,689 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:15:16,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:15:16,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1227056241, now seen corresponding path program 1 times [2020-08-22 17:15:16,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:15:16,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662922649] [2020-08-22 17:15:16,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:15:16,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:15:17,549 WARN L193 SmtUtils]: Spent 444.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-22 17:15:17,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:15:17,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:15:17,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:15:17,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662922649] [2020-08-22 17:15:17,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:15:17,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:15:17,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529206333] [2020-08-22 17:15:17,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:15:17,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:15:17,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:15:17,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:15:17,670 INFO L87 Difference]: Start difference. First operand 16491 states and 24849 transitions. Second operand 4 states. [2020-08-22 17:15:24,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:15:24,000 INFO L93 Difference]: Finished difference Result 30491 states and 46183 transitions. [2020-08-22 17:15:24,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:15:24,001 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-08-22 17:15:24,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:15:24,032 INFO L225 Difference]: With dead ends: 30491 [2020-08-22 17:15:24,032 INFO L226 Difference]: Without dead ends: 20989 [2020-08-22 17:15:24,049 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:15:24,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20989 states. [2020-08-22 17:15:25,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20989 to 18395. [2020-08-22 17:15:25,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18395 states. [2020-08-22 17:15:25,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18395 states to 18395 states and 27871 transitions. [2020-08-22 17:15:25,040 INFO L78 Accepts]: Start accepts. Automaton has 18395 states and 27871 transitions. Word has length 330 [2020-08-22 17:15:25,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:15:25,041 INFO L479 AbstractCegarLoop]: Abstraction has 18395 states and 27871 transitions. [2020-08-22 17:15:25,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:15:25,041 INFO L276 IsEmpty]: Start isEmpty. Operand 18395 states and 27871 transitions. [2020-08-22 17:15:25,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-08-22 17:15:25,054 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:15:25,054 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:15:25,054 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 17:15:25,054 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:15:25,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:15:25,055 INFO L82 PathProgramCache]: Analyzing trace with hash 2000347144, now seen corresponding path program 1 times [2020-08-22 17:15:25,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:15:25,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697928523] [2020-08-22 17:15:25,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:15:25,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:15:25,661 WARN L193 SmtUtils]: Spent 442.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-22 17:15:25,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:15:25,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:15:25,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:15:25,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697928523] [2020-08-22 17:15:25,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:15:25,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:15:25,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960698227] [2020-08-22 17:15:25,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:15:25,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:15:25,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:15:25,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:15:25,736 INFO L87 Difference]: Start difference. First operand 18395 states and 27871 transitions. Second operand 4 states. [2020-08-22 17:15:32,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:15:32,536 INFO L93 Difference]: Finished difference Result 33823 states and 51649 transitions. [2020-08-22 17:15:32,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:15:32,538 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2020-08-22 17:15:32,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:15:32,562 INFO L225 Difference]: With dead ends: 33823 [2020-08-22 17:15:32,562 INFO L226 Difference]: Without dead ends: 23821 [2020-08-22 17:15:32,581 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:15:32,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23821 states. [2020-08-22 17:15:33,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23821 to 21819. [2020-08-22 17:15:33,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21819 states. [2020-08-22 17:15:33,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21819 states to 21819 states and 33359 transitions. [2020-08-22 17:15:33,590 INFO L78 Accepts]: Start accepts. Automaton has 21819 states and 33359 transitions. Word has length 332 [2020-08-22 17:15:33,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:15:33,590 INFO L479 AbstractCegarLoop]: Abstraction has 21819 states and 33359 transitions. [2020-08-22 17:15:33,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:15:33,591 INFO L276 IsEmpty]: Start isEmpty. Operand 21819 states and 33359 transitions. [2020-08-22 17:15:33,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-08-22 17:15:33,603 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:15:33,604 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:15:33,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 17:15:33,604 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:15:33,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:15:33,604 INFO L82 PathProgramCache]: Analyzing trace with hash 2033012311, now seen corresponding path program 1 times [2020-08-22 17:15:33,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:15:33,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101230258] [2020-08-22 17:15:33,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:15:33,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:15:34,103 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-22 17:15:34,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:15:34,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:15:34,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:15:34,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101230258] [2020-08-22 17:15:34,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:15:34,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:15:34,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032012331] [2020-08-22 17:15:34,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:15:34,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:15:34,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:15:34,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:15:34,172 INFO L87 Difference]: Start difference. First operand 21819 states and 33359 transitions. Second operand 4 states. [2020-08-22 17:15:43,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:15:43,515 INFO L93 Difference]: Finished difference Result 59507 states and 90499 transitions. [2020-08-22 17:15:43,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:15:43,516 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2020-08-22 17:15:43,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:15:43,557 INFO L225 Difference]: With dead ends: 59507 [2020-08-22 17:15:43,557 INFO L226 Difference]: Without dead ends: 40395 [2020-08-22 17:15:43,576 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:15:43,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40395 states. [2020-08-22 17:15:44,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40395 to 22147. [2020-08-22 17:15:44,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22147 states. [2020-08-22 17:15:44,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22147 states to 22147 states and 33797 transitions. [2020-08-22 17:15:44,859 INFO L78 Accepts]: Start accepts. Automaton has 22147 states and 33797 transitions. Word has length 332 [2020-08-22 17:15:44,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:15:44,860 INFO L479 AbstractCegarLoop]: Abstraction has 22147 states and 33797 transitions. [2020-08-22 17:15:44,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:15:44,860 INFO L276 IsEmpty]: Start isEmpty. Operand 22147 states and 33797 transitions. [2020-08-22 17:15:44,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-08-22 17:15:44,875 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:15:44,876 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:15:44,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 17:15:44,876 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:15:44,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:15:44,877 INFO L82 PathProgramCache]: Analyzing trace with hash -273553115, now seen corresponding path program 1 times [2020-08-22 17:15:44,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:15:44,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787702171] [2020-08-22 17:15:44,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:15:44,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:15:45,371 WARN L193 SmtUtils]: Spent 379.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-22 17:15:45,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:15:45,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:15:45,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:15:45,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787702171] [2020-08-22 17:15:45,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:15:45,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:15:45,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925579881] [2020-08-22 17:15:45,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:15:45,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:15:45,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:15:45,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:15:45,441 INFO L87 Difference]: Start difference. First operand 22147 states and 33797 transitions. Second operand 4 states. [2020-08-22 17:15:55,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:15:55,036 INFO L93 Difference]: Finished difference Result 59783 states and 90773 transitions. [2020-08-22 17:15:55,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:15:55,037 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 333 [2020-08-22 17:15:55,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:15:55,071 INFO L225 Difference]: With dead ends: 59783 [2020-08-22 17:15:55,071 INFO L226 Difference]: Without dead ends: 40691 [2020-08-22 17:15:55,091 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:15:55,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40691 states. [2020-08-22 17:15:56,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40691 to 22475. [2020-08-22 17:15:56,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22475 states. [2020-08-22 17:15:56,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22475 states to 22475 states and 34165 transitions. [2020-08-22 17:15:56,213 INFO L78 Accepts]: Start accepts. Automaton has 22475 states and 34165 transitions. Word has length 333 [2020-08-22 17:15:56,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:15:56,214 INFO L479 AbstractCegarLoop]: Abstraction has 22475 states and 34165 transitions. [2020-08-22 17:15:56,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:15:56,214 INFO L276 IsEmpty]: Start isEmpty. Operand 22475 states and 34165 transitions. [2020-08-22 17:15:56,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-08-22 17:15:56,234 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:15:56,234 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:15:56,234 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 17:15:56,234 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:15:56,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:15:56,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1275140562, now seen corresponding path program 1 times [2020-08-22 17:15:56,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:15:56,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106804762] [2020-08-22 17:15:56,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:15:56,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:15:57,179 WARN L193 SmtUtils]: Spent 477.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-22 17:15:57,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:15:57,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:15:57,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:15:57,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106804762] [2020-08-22 17:15:57,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:15:57,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-22 17:15:57,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256794453] [2020-08-22 17:15:57,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 17:15:57,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:15:57,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 17:15:57,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-22 17:15:57,358 INFO L87 Difference]: Start difference. First operand 22475 states and 34165 transitions. Second operand 10 states. [2020-08-22 17:15:57,853 WARN L193 SmtUtils]: Spent 421.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2020-08-22 17:16:07,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:16:07,839 INFO L93 Difference]: Finished difference Result 65989 states and 102088 transitions. [2020-08-22 17:16:07,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 17:16:07,840 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 333 [2020-08-22 17:16:07,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:16:07,895 INFO L225 Difference]: With dead ends: 65989 [2020-08-22 17:16:07,896 INFO L226 Difference]: Without dead ends: 51735 [2020-08-22 17:16:07,915 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2020-08-22 17:16:07,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51735 states. [2020-08-22 17:16:10,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51735 to 41573. [2020-08-22 17:16:10,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41573 states. [2020-08-22 17:16:10,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41573 states to 41573 states and 63357 transitions. [2020-08-22 17:16:10,560 INFO L78 Accepts]: Start accepts. Automaton has 41573 states and 63357 transitions. Word has length 333 [2020-08-22 17:16:10,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:16:10,560 INFO L479 AbstractCegarLoop]: Abstraction has 41573 states and 63357 transitions. [2020-08-22 17:16:10,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 17:16:10,560 INFO L276 IsEmpty]: Start isEmpty. Operand 41573 states and 63357 transitions. [2020-08-22 17:16:10,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-08-22 17:16:10,583 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:16:10,584 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:16:10,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 17:16:10,584 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:16:10,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:16:10,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1537943031, now seen corresponding path program 1 times [2020-08-22 17:16:10,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:16:10,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840468501] [2020-08-22 17:16:10,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:16:10,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:16:11,597 WARN L193 SmtUtils]: Spent 426.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-22 17:16:11,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:16:11,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:16:11,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:16:11,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840468501] [2020-08-22 17:16:11,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:16:11,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 17:16:11,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358134431] [2020-08-22 17:16:11,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 17:16:11,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:16:11,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 17:16:11,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 17:16:11,768 INFO L87 Difference]: Start difference. First operand 41573 states and 63357 transitions. Second operand 5 states. [2020-08-22 17:16:12,223 WARN L193 SmtUtils]: Spent 409.00 ms on a formula simplification that was a NOOP. DAG size: 284 [2020-08-22 17:16:20,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:16:20,335 INFO L93 Difference]: Finished difference Result 70055 states and 109281 transitions. [2020-08-22 17:16:20,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 17:16:20,341 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 333 [2020-08-22 17:16:20,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:16:20,398 INFO L225 Difference]: With dead ends: 70055 [2020-08-22 17:16:20,398 INFO L226 Difference]: Without dead ends: 49391 [2020-08-22 17:16:20,421 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-22 17:16:20,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49391 states. [2020-08-22 17:16:23,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49391 to 49389. [2020-08-22 17:16:23,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49389 states. [2020-08-22 17:16:23,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49389 states to 49389 states and 75753 transitions. [2020-08-22 17:16:23,540 INFO L78 Accepts]: Start accepts. Automaton has 49389 states and 75753 transitions. Word has length 333 [2020-08-22 17:16:23,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:16:23,540 INFO L479 AbstractCegarLoop]: Abstraction has 49389 states and 75753 transitions. [2020-08-22 17:16:23,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 17:16:23,540 INFO L276 IsEmpty]: Start isEmpty. Operand 49389 states and 75753 transitions. [2020-08-22 17:16:23,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-08-22 17:16:23,558 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:16:23,558 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:16:23,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 17:16:23,558 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:16:23,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:16:23,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1942664128, now seen corresponding path program 1 times [2020-08-22 17:16:23,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:16:23,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401518327] [2020-08-22 17:16:23,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:16:23,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:16:24,260 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-22 17:16:24,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:16:24,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:16:24,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:16:24,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401518327] [2020-08-22 17:16:24,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:16:24,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 17:16:24,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845708698] [2020-08-22 17:16:24,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 17:16:24,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:16:24,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 17:16:24,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 17:16:24,580 INFO L87 Difference]: Start difference. First operand 49389 states and 75753 transitions. Second operand 5 states. [2020-08-22 17:16:38,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:16:38,648 INFO L93 Difference]: Finished difference Result 144252 states and 220978 transitions. [2020-08-22 17:16:38,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 17:16:38,648 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 333 [2020-08-22 17:16:38,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:16:38,749 INFO L225 Difference]: With dead ends: 144252 [2020-08-22 17:16:38,749 INFO L226 Difference]: Without dead ends: 95694 [2020-08-22 17:16:38,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 17:16:38,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95694 states. [2020-08-22 17:16:45,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95694 to 95692. [2020-08-22 17:16:45,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95692 states. [2020-08-22 17:16:47,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95692 states to 95692 states and 145852 transitions. [2020-08-22 17:16:47,177 INFO L78 Accepts]: Start accepts. Automaton has 95692 states and 145852 transitions. Word has length 333 [2020-08-22 17:16:47,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:16:47,177 INFO L479 AbstractCegarLoop]: Abstraction has 95692 states and 145852 transitions. [2020-08-22 17:16:47,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 17:16:47,177 INFO L276 IsEmpty]: Start isEmpty. Operand 95692 states and 145852 transitions. [2020-08-22 17:16:47,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-08-22 17:16:47,213 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:16:47,213 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:16:47,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 17:16:47,214 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:16:47,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:16:47,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1968714646, now seen corresponding path program 1 times [2020-08-22 17:16:47,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:16:47,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078403997] [2020-08-22 17:16:47,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:16:47,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:16:47,904 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-22 17:16:47,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:16:47,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:16:47,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:16:47,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078403997] [2020-08-22 17:16:47,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:16:47,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 17:16:47,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302801095] [2020-08-22 17:16:47,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 17:16:47,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:16:47,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 17:16:47,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 17:16:47,986 INFO L87 Difference]: Start difference. First operand 95692 states and 145852 transitions. Second operand 5 states. [2020-08-22 17:17:01,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:17:01,902 INFO L93 Difference]: Finished difference Result 137921 states and 210173 transitions. [2020-08-22 17:17:01,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 17:17:01,903 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 334 [2020-08-22 17:17:01,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:17:02,006 INFO L225 Difference]: With dead ends: 137921 [2020-08-22 17:17:02,006 INFO L226 Difference]: Without dead ends: 95694 [2020-08-22 17:17:02,046 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 17:17:02,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95694 states. [2020-08-22 17:17:10,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95694 to 91406. [2020-08-22 17:17:10,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91406 states. [2020-08-22 17:17:11,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91406 states to 91406 states and 139668 transitions. [2020-08-22 17:17:11,071 INFO L78 Accepts]: Start accepts. Automaton has 91406 states and 139668 transitions. Word has length 334 [2020-08-22 17:17:11,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:17:11,071 INFO L479 AbstractCegarLoop]: Abstraction has 91406 states and 139668 transitions. [2020-08-22 17:17:11,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 17:17:11,071 INFO L276 IsEmpty]: Start isEmpty. Operand 91406 states and 139668 transitions. [2020-08-22 17:17:11,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-08-22 17:17:11,103 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:17:11,103 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:17:11,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 17:17:11,103 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:17:11,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:17:11,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1241415225, now seen corresponding path program 1 times [2020-08-22 17:17:11,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:17:11,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66682934] [2020-08-22 17:17:11,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:17:11,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:17:11,744 WARN L193 SmtUtils]: Spent 535.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-22 17:17:11,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:17:11,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:17:11,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:17:11,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66682934] [2020-08-22 17:17:11,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:17:11,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:17:11,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749625935] [2020-08-22 17:17:11,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:17:11,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:17:11,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:17:11,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:17:11,861 INFO L87 Difference]: Start difference. First operand 91406 states and 139668 transitions. Second operand 4 states. [2020-08-22 17:17:33,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:17:33,132 INFO L93 Difference]: Finished difference Result 270320 states and 412826 transitions. [2020-08-22 17:17:33,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:17:33,133 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 337 [2020-08-22 17:17:33,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:17:33,348 INFO L225 Difference]: With dead ends: 270320 [2020-08-22 17:17:33,348 INFO L226 Difference]: Without dead ends: 180528 [2020-08-22 17:17:33,425 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:17:33,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180528 states. [2020-08-22 17:17:43,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180528 to 91750. [2020-08-22 17:17:43,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91750 states. [2020-08-22 17:17:44,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91750 states to 91750 states and 140036 transitions. [2020-08-22 17:17:44,043 INFO L78 Accepts]: Start accepts. Automaton has 91750 states and 140036 transitions. Word has length 337 [2020-08-22 17:17:44,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:17:44,043 INFO L479 AbstractCegarLoop]: Abstraction has 91750 states and 140036 transitions. [2020-08-22 17:17:44,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:17:44,043 INFO L276 IsEmpty]: Start isEmpty. Operand 91750 states and 140036 transitions. [2020-08-22 17:17:44,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-08-22 17:17:44,073 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:17:44,073 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:17:44,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 17:17:44,074 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:17:44,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:17:44,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1683426062, now seen corresponding path program 1 times [2020-08-22 17:17:44,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:17:44,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792026086] [2020-08-22 17:17:44,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:17:44,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:17:44,621 WARN L193 SmtUtils]: Spent 400.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-22 17:17:44,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:17:44,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:17:44,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:17:44,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792026086] [2020-08-22 17:17:44,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:17:44,729 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:17:44,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944558933] [2020-08-22 17:17:44,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:17:44,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:17:44,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:17:44,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:17:44,731 INFO L87 Difference]: Start difference. First operand 91750 states and 140036 transitions. Second operand 4 states. [2020-08-22 17:18:06,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:18:06,662 INFO L93 Difference]: Finished difference Result 264309 states and 403517 transitions. [2020-08-22 17:18:06,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:18:06,663 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 337 [2020-08-22 17:18:06,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:18:06,853 INFO L225 Difference]: With dead ends: 264309 [2020-08-22 17:18:06,853 INFO L226 Difference]: Without dead ends: 177799 [2020-08-22 17:18:06,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:18:07,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177799 states. [2020-08-22 17:18:24,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177799 to 177797. [2020-08-22 17:18:24,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177797 states. [2020-08-22 17:18:24,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177797 states to 177797 states and 270305 transitions. [2020-08-22 17:18:24,823 INFO L78 Accepts]: Start accepts. Automaton has 177797 states and 270305 transitions. Word has length 337 [2020-08-22 17:18:24,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:18:24,823 INFO L479 AbstractCegarLoop]: Abstraction has 177797 states and 270305 transitions. [2020-08-22 17:18:24,823 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:18:24,823 INFO L276 IsEmpty]: Start isEmpty. Operand 177797 states and 270305 transitions. [2020-08-22 17:18:24,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-08-22 17:18:24,881 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:18:24,881 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:18:24,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 17:18:24,882 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:18:24,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:18:24,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1966579330, now seen corresponding path program 1 times [2020-08-22 17:18:24,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:18:24,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144182331] [2020-08-22 17:18:24,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:18:24,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:18:25,414 WARN L193 SmtUtils]: Spent 407.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-22 17:18:25,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:18:25,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:18:25,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:18:25,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144182331] [2020-08-22 17:18:25,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:18:25,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:18:25,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805506230] [2020-08-22 17:18:25,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:18:25,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:18:25,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:18:25,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:18:25,514 INFO L87 Difference]: Start difference. First operand 177797 states and 270305 transitions. Second operand 4 states. [2020-08-22 17:19:03,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:19:03,750 INFO L93 Difference]: Finished difference Result 512409 states and 777349 transitions. [2020-08-22 17:19:03,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:19:03,751 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 339 [2020-08-22 17:19:03,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:19:04,193 INFO L225 Difference]: With dead ends: 512409 [2020-08-22 17:19:04,193 INFO L226 Difference]: Without dead ends: 337394 [2020-08-22 17:19:04,319 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:19:04,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337394 states. [2020-08-22 17:19:40,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337394 to 337392. [2020-08-22 17:19:40,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337392 states. [2020-08-22 17:19:40,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337392 states to 337392 states and 507965 transitions. [2020-08-22 17:19:40,860 INFO L78 Accepts]: Start accepts. Automaton has 337392 states and 507965 transitions. Word has length 339 [2020-08-22 17:19:40,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:19:40,860 INFO L479 AbstractCegarLoop]: Abstraction has 337392 states and 507965 transitions. [2020-08-22 17:19:40,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:19:40,860 INFO L276 IsEmpty]: Start isEmpty. Operand 337392 states and 507965 transitions. [2020-08-22 17:19:40,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-08-22 17:19:40,987 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:19:40,987 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:19:40,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 17:19:40,988 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:19:40,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:19:40,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1882657510, now seen corresponding path program 1 times [2020-08-22 17:19:40,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:19:40,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800891380] [2020-08-22 17:19:40,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:19:41,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:19:41,673 WARN L193 SmtUtils]: Spent 404.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-22 17:19:41,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:19:41,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:19:41,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:19:41,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800891380] [2020-08-22 17:19:41,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:19:41,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 17:19:41,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936579775] [2020-08-22 17:19:41,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 17:19:41,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:19:41,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 17:19:41,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 17:19:41,773 INFO L87 Difference]: Start difference. First operand 337392 states and 507965 transitions. Second operand 5 states. [2020-08-22 17:20:25,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:20:25,602 INFO L93 Difference]: Finished difference Result 699505 states and 1050397 transitions. [2020-08-22 17:20:25,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 17:20:25,603 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 339 [2020-08-22 17:20:25,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:20:26,108 INFO L225 Difference]: With dead ends: 699505 [2020-08-22 17:20:26,109 INFO L226 Difference]: Without dead ends: 352215 [2020-08-22 17:20:26,353 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 17:20:26,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352215 states. [2020-08-22 17:21:03,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352215 to 352213. [2020-08-22 17:21:03,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352213 states. [2020-08-22 17:21:03,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352213 states to 352213 states and 526237 transitions. [2020-08-22 17:21:03,729 INFO L78 Accepts]: Start accepts. Automaton has 352213 states and 526237 transitions. Word has length 339 [2020-08-22 17:21:03,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:21:03,729 INFO L479 AbstractCegarLoop]: Abstraction has 352213 states and 526237 transitions. [2020-08-22 17:21:03,729 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 17:21:03,730 INFO L276 IsEmpty]: Start isEmpty. Operand 352213 states and 526237 transitions. [2020-08-22 17:21:03,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2020-08-22 17:21:03,867 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:21:03,868 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:21:03,868 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-22 17:21:03,868 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:21:03,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:21:03,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1719490276, now seen corresponding path program 1 times [2020-08-22 17:21:03,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:21:03,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556775130] [2020-08-22 17:21:03,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:21:03,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:21:04,468 WARN L193 SmtUtils]: Spent 409.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-22 17:21:04,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:21:04,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:21:05,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:21:05,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556775130] [2020-08-22 17:21:05,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:21:05,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:21:05,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433060720] [2020-08-22 17:21:05,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:21:05,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:21:05,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:21:05,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:21:05,342 INFO L87 Difference]: Start difference. First operand 352213 states and 526237 transitions. Second operand 4 states. [2020-08-22 17:22:06,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:22:06,447 INFO L93 Difference]: Finished difference Result 846681 states and 1282567 transitions. [2020-08-22 17:22:06,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:22:06,448 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 340 [2020-08-22 17:22:06,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:22:07,185 INFO L225 Difference]: With dead ends: 846681 [2020-08-22 17:22:07,185 INFO L226 Difference]: Without dead ends: 557571 [2020-08-22 17:22:07,373 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:22:07,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557571 states. [2020-08-22 17:23:10,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557571 to 514081. [2020-08-22 17:23:10,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 514081 states. [2020-08-22 17:23:10,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514081 states to 514081 states and 776541 transitions. [2020-08-22 17:23:10,840 INFO L78 Accepts]: Start accepts. Automaton has 514081 states and 776541 transitions. Word has length 340 [2020-08-22 17:23:10,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:23:10,841 INFO L479 AbstractCegarLoop]: Abstraction has 514081 states and 776541 transitions. [2020-08-22 17:23:10,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 17:23:10,841 INFO L276 IsEmpty]: Start isEmpty. Operand 514081 states and 776541 transitions. [2020-08-22 17:23:10,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2020-08-22 17:23:10,973 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:23:10,974 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:23:10,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-22 17:23:10,974 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:23:10,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:23:10,974 INFO L82 PathProgramCache]: Analyzing trace with hash 989201276, now seen corresponding path program 1 times [2020-08-22 17:23:10,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:23:10,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438733483] [2020-08-22 17:23:10,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:23:11,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:23:11,500 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-08-22 17:23:11,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:23:11,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:23:11,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:23:11,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438733483] [2020-08-22 17:23:11,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:23:11,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 17:23:11,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230357862] [2020-08-22 17:23:11,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 17:23:11,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:23:11,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 17:23:11,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:23:11,568 INFO L87 Difference]: Start difference. First operand 514081 states and 776541 transitions. Second operand 4 states. [2020-08-22 17:25:08,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:25:08,857 INFO L93 Difference]: Finished difference Result 1513801 states and 2288443 transitions. [2020-08-22 17:25:08,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 17:25:08,858 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 340 [2020-08-22 17:25:08,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:25:10,218 INFO L225 Difference]: With dead ends: 1513801 [2020-08-22 17:25:10,219 INFO L226 Difference]: Without dead ends: 1018563 [2020-08-22 17:25:10,512 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 17:25:11,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018563 states.