/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/gcd01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 15:49:23,716 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 15:49:23,720 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 15:49:23,778 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-21 15:49:23,809 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 15:49:23,812 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 15:49:23,815 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 15:49:23,817 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 15:49:23,821 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 15:49:23,823 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 15:49:23,831 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 15:49:23,839 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 15:49:23,842 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 15:49:23,844 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 15:49:23,846 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 15:49:23,849 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 15:49:23,859 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 15:49:23,886 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 15:49:23,887 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 15:49:23,888 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 15:49:23,889 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 [2021-02-21 15:49:23,942 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 15:49:23,942 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 15:49:23,944 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-21 15:49:23,944 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-21 15:49:23,944 INFO L138 SettingsManager]: * Use SBE=true [2021-02-21 15:49:23,945 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 15:49:23,945 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 15:49:23,945 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 15:49:23,945 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 15:49:23,945 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 15:49:23,946 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 15:49:23,946 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 15:49:23,946 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 15:49:23,946 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 15:49:23,946 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 15:49:23,947 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 15:49:23,947 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 15:49:23,947 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 15:49:23,947 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-21 15:49:23,948 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 15:49:23,948 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 15:49:23,948 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 15:49:23,948 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-21 15:49:23,948 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-21 15:49:23,949 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-21 15:49:23,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-21 15:49:23,949 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 15:49:23,949 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-21 15:49:23,949 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 15:49:24,339 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 15:49:24,368 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 15:49:24,371 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 15:49:24,372 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 15:49:24,373 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 15:49:24,374 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/gcd01-1.c [2021-02-21 15:49:24,471 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12d00cb9e/bd36a3e48149413190b72722092f9b1e/FLAG7c3ba077d [2021-02-21 15:49:25,121 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 15:49:25,122 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/gcd01-1.c [2021-02-21 15:49:25,130 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12d00cb9e/bd36a3e48149413190b72722092f9b1e/FLAG7c3ba077d [2021-02-21 15:49:25,493 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12d00cb9e/bd36a3e48149413190b72722092f9b1e [2021-02-21 15:49:25,496 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 15:49:25,511 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 15:49:25,512 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 15:49:25,513 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 15:49:25,517 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 15:49:25,518 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 03:49:25" (1/1) ... [2021-02-21 15:49:25,519 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62dda1cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:49:25, skipping insertion in model container [2021-02-21 15:49:25,520 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 03:49:25" (1/1) ... [2021-02-21 15:49:25,528 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 15:49:25,544 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 15:49:25,701 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive/gcd01-1.c[1008,1021] [2021-02-21 15:49:25,705 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 15:49:25,717 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 15:49:25,736 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive/gcd01-1.c[1008,1021] [2021-02-21 15:49:25,737 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 15:49:25,753 INFO L208 MainTranslator]: Completed translation [2021-02-21 15:49:25,754 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:49:25 WrapperNode [2021-02-21 15:49:25,754 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 15:49:25,755 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 15:49:25,756 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 15:49:25,756 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 15:49:25,770 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:49:25" (1/1) ... [2021-02-21 15:49:25,770 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:49:25" (1/1) ... [2021-02-21 15:49:25,778 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:49:25" (1/1) ... [2021-02-21 15:49:25,779 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:49:25" (1/1) ... [2021-02-21 15:49:25,785 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:49:25" (1/1) ... [2021-02-21 15:49:25,787 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:49:25" (1/1) ... [2021-02-21 15:49:25,789 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:49:25" (1/1) ... [2021-02-21 15:49:25,791 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 15:49:25,793 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 15:49:25,793 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 15:49:25,793 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 15:49:25,794 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:49:25" (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 [2021-02-21 15:49:25,914 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 15:49:25,914 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 15:49:25,915 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 15:49:25,915 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd [2021-02-21 15:49:25,915 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 15:49:25,915 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 15:49:25,915 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 15:49:25,916 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 15:49:25,916 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 15:49:25,916 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-21 15:49:25,917 INFO L130 BoogieDeclarations]: Found specification of procedure gcd [2021-02-21 15:49:25,917 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 15:49:25,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 15:49:25,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 15:49:25,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 15:49:25,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 15:49:25,920 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 15:49:25,920 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 15:49:26,338 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 15:49:26,339 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-21 15:49:26,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 03:49:26 BoogieIcfgContainer [2021-02-21 15:49:26,341 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 15:49:26,343 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 15:49:26,344 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 15:49:26,348 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 15:49:26,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 03:49:25" (1/3) ... [2021-02-21 15:49:26,349 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24c7df2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 03:49:26, skipping insertion in model container [2021-02-21 15:49:26,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:49:25" (2/3) ... [2021-02-21 15:49:26,350 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24c7df2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 03:49:26, skipping insertion in model container [2021-02-21 15:49:26,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 03:49:26" (3/3) ... [2021-02-21 15:49:26,352 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd01-1.c [2021-02-21 15:49:26,361 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-21 15:49:26,373 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 15:49:26,413 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 15:49:26,447 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 15:49:26,447 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 15:49:26,448 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-21 15:49:26,448 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 15:49:26,448 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 15:49:26,448 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 15:49:26,448 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 15:49:26,449 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 15:49:26,469 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2021-02-21 15:49:26,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-21 15:49:26,476 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 15:49:26,477 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 15:49:26,478 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 15:49:26,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 15:49:26,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1749454543, now seen corresponding path program 1 times [2021-02-21 15:49:26,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 15:49:26,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322707592] [2021-02-21 15:49:26,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 15:49:26,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 15:49:26,723 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:26,725 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 15:49:26,727 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:26,729 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 15:49:26,753 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:26,754 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 15:49:26,775 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:26,776 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 15:49:26,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 15:49:26,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 15:49:26,889 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:26,892 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 15:49:26,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-02-21 15:49:26,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 15:49:26,939 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:26,942 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 15:49:27,019 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:27,025 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 15:49:27,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 15:49:27,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322707592] [2021-02-21 15:49:27,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 15:49:27,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-21 15:49:27,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544120735] [2021-02-21 15:49:27,104 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-21 15:49:27,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 15:49:27,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-21 15:49:27,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-02-21 15:49:27,125 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 7 states. [2021-02-21 15:49:27,661 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-02-21 15:49:27,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 15:49:27,850 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2021-02-21 15:49:27,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-21 15:49:27,852 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2021-02-21 15:49:27,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 15:49:27,862 INFO L225 Difference]: With dead ends: 41 [2021-02-21 15:49:27,863 INFO L226 Difference]: Without dead ends: 25 [2021-02-21 15:49:27,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-02-21 15:49:27,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-02-21 15:49:27,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-02-21 15:49:27,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-02-21 15:49:27,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2021-02-21 15:49:27,915 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 16 [2021-02-21 15:49:27,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 15:49:27,916 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2021-02-21 15:49:27,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-21 15:49:27,916 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2021-02-21 15:49:27,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-21 15:49:27,918 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 15:49:27,918 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 15:49:27,918 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 15:49:27,919 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 15:49:27,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 15:49:27,920 INFO L82 PathProgramCache]: Analyzing trace with hash -2120307351, now seen corresponding path program 1 times [2021-02-21 15:49:27,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 15:49:27,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560937269] [2021-02-21 15:49:27,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 15:49:27,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 15:49:27,964 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:27,965 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 15:49:27,966 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:27,967 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 15:49:27,972 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:27,973 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 15:49:27,978 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:27,979 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 15:49:28,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 15:49:28,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 15:49:28,022 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:28,022 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 15:49:28,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-02-21 15:49:28,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 15:49:28,035 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:28,036 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 15:49:28,037 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:28,037 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 15:49:28,046 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:28,047 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 15:49:28,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 15:49:28,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560937269] [2021-02-21 15:49:28,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 15:49:28,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-21 15:49:28,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675877528] [2021-02-21 15:49:28,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-21 15:49:28,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 15:49:28,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-21 15:49:28,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-02-21 15:49:28,063 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 7 states. [2021-02-21 15:49:28,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 15:49:28,417 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2021-02-21 15:49:28,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-21 15:49:28,418 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2021-02-21 15:49:28,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 15:49:28,420 INFO L225 Difference]: With dead ends: 31 [2021-02-21 15:49:28,420 INFO L226 Difference]: Without dead ends: 27 [2021-02-21 15:49:28,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-02-21 15:49:28,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-02-21 15:49:28,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2021-02-21 15:49:28,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-02-21 15:49:28,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2021-02-21 15:49:28,432 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 17 [2021-02-21 15:49:28,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 15:49:28,433 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2021-02-21 15:49:28,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-21 15:49:28,433 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2021-02-21 15:49:28,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-21 15:49:28,435 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 15:49:28,435 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 15:49:28,436 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 15:49:28,436 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 15:49:28,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 15:49:28,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1921119129, now seen corresponding path program 1 times [2021-02-21 15:49:28,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 15:49:28,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913527914] [2021-02-21 15:49:28,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 15:49:28,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 15:49:28,492 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:28,495 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 15:49:28,497 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:28,498 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 15:49:28,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 15:49:28,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 15:49:28,538 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:28,539 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 15:49:28,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-02-21 15:49:28,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 15:49:28,558 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:28,559 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 15:49:28,560 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:28,560 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 15:49:28,569 WARN L141 QuantifierPusher]: treesize reduction 10, result has 44.4 percent of original size [2021-02-21 15:49:28,570 WARN L147 QuantifierPusher]: treesize reduction 10, result has 44.4 percent of original size 8 [2021-02-21 15:49:28,581 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:28,582 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 15:49:28,595 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:28,596 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 15:49:28,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-02-21 15:49:28,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 15:49:28,616 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:28,620 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 15:49:28,632 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:28,633 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 15:49:28,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-21 15:49:28,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913527914] [2021-02-21 15:49:28,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 15:49:28,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-21 15:49:28,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397326908] [2021-02-21 15:49:28,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-21 15:49:28,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 15:49:28,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-21 15:49:28,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-02-21 15:49:28,652 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 8 states. [2021-02-21 15:49:29,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 15:49:29,005 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2021-02-21 15:49:29,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-21 15:49:29,006 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2021-02-21 15:49:29,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 15:49:29,008 INFO L225 Difference]: With dead ends: 37 [2021-02-21 15:49:29,008 INFO L226 Difference]: Without dead ends: 29 [2021-02-21 15:49:29,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-02-21 15:49:29,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-02-21 15:49:29,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2021-02-21 15:49:29,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-02-21 15:49:29,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2021-02-21 15:49:29,030 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 24 [2021-02-21 15:49:29,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 15:49:29,031 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2021-02-21 15:49:29,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-21 15:49:29,031 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2021-02-21 15:49:29,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-21 15:49:29,034 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 15:49:29,034 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 15:49:29,035 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 15:49:29,035 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 15:49:29,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 15:49:29,036 INFO L82 PathProgramCache]: Analyzing trace with hash -575359383, now seen corresponding path program 1 times [2021-02-21 15:49:29,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 15:49:29,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106859841] [2021-02-21 15:49:29,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 15:49:29,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 15:49:29,101 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:29,102 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 15:49:29,103 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:29,103 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 15:49:29,107 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:29,108 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 15:49:29,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 15:49:29,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 15:49:29,152 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:29,153 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 15:49:29,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-02-21 15:49:29,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 15:49:29,178 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:29,179 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 15:49:29,180 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:29,180 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 15:49:29,187 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:29,188 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 15:49:29,205 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:29,206 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 15:49:29,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-02-21 15:49:29,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 15:49:29,242 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:29,244 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 15:49:29,259 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:29,261 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 15:49:29,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-21 15:49:29,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106859841] [2021-02-21 15:49:29,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 15:49:29,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-21 15:49:29,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628526170] [2021-02-21 15:49:29,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-21 15:49:29,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 15:49:29,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-21 15:49:29,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-02-21 15:49:29,291 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 8 states. [2021-02-21 15:49:29,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 15:49:29,668 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2021-02-21 15:49:29,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-21 15:49:29,669 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2021-02-21 15:49:29,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 15:49:29,670 INFO L225 Difference]: With dead ends: 37 [2021-02-21 15:49:29,670 INFO L226 Difference]: Without dead ends: 27 [2021-02-21 15:49:29,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-02-21 15:49:29,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-02-21 15:49:29,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2021-02-21 15:49:29,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-02-21 15:49:29,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-02-21 15:49:29,692 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 24 [2021-02-21 15:49:29,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 15:49:29,693 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-02-21 15:49:29,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-21 15:49:29,693 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-02-21 15:49:29,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-21 15:49:29,694 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 15:49:29,694 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 15:49:29,694 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-21 15:49:29,695 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 15:49:29,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 15:49:29,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1225207111, now seen corresponding path program 1 times [2021-02-21 15:49:29,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 15:49:29,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524668289] [2021-02-21 15:49:29,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 15:49:29,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 15:49:29,725 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:29,725 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 15:49:29,726 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:29,727 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 15:49:29,731 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:29,731 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 15:49:29,736 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:29,737 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 15:49:29,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 15:49:29,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 15:49:29,770 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:29,771 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 15:49:29,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-02-21 15:49:29,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 15:49:29,784 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:29,785 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 15:49:29,785 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:29,786 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 15:49:29,793 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:29,794 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 15:49:29,803 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:29,803 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 15:49:29,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-02-21 15:49:29,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 15:49:29,820 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:29,821 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 15:49:29,822 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:29,822 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 15:49:29,823 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:29,824 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 15:49:29,825 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-21 15:49:29,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524668289] [2021-02-21 15:49:29,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 15:49:29,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-21 15:49:29,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951391711] [2021-02-21 15:49:29,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-21 15:49:29,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 15:49:29,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-21 15:49:29,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-02-21 15:49:29,828 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 8 states. [2021-02-21 15:49:30,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 15:49:30,139 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2021-02-21 15:49:30,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-21 15:49:30,139 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2021-02-21 15:49:30,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 15:49:30,141 INFO L225 Difference]: With dead ends: 32 [2021-02-21 15:49:30,141 INFO L226 Difference]: Without dead ends: 28 [2021-02-21 15:49:30,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-02-21 15:49:30,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-02-21 15:49:30,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2021-02-21 15:49:30,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-02-21 15:49:30,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2021-02-21 15:49:30,150 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 25 [2021-02-21 15:49:30,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 15:49:30,151 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2021-02-21 15:49:30,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-21 15:49:30,151 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2021-02-21 15:49:30,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-21 15:49:30,152 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 15:49:30,152 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 15:49:30,153 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-21 15:49:30,153 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 15:49:30,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 15:49:30,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1830908953, now seen corresponding path program 1 times [2021-02-21 15:49:30,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 15:49:30,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92954547] [2021-02-21 15:49:30,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 15:49:30,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 15:49:30,178 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:30,179 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 15:49:30,179 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:30,180 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 15:49:30,183 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:30,184 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 15:49:30,188 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:30,189 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 15:49:30,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 15:49:30,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 15:49:30,221 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:30,221 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 15:49:30,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-02-21 15:49:30,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 15:49:30,233 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:30,234 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 15:49:30,235 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:30,235 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 15:49:30,243 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:30,243 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 15:49:30,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-02-21 15:49:30,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 15:49:30,267 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:30,268 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 15:49:30,268 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:30,269 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 15:49:30,278 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:30,279 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 15:49:30,281 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-21 15:49:30,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92954547] [2021-02-21 15:49:30,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 15:49:30,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-21 15:49:30,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281654866] [2021-02-21 15:49:30,282 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-21 15:49:30,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 15:49:30,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-21 15:49:30,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-02-21 15:49:30,284 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 8 states. [2021-02-21 15:49:30,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 15:49:30,619 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2021-02-21 15:49:30,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-21 15:49:30,619 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2021-02-21 15:49:30,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 15:49:30,623 INFO L225 Difference]: With dead ends: 35 [2021-02-21 15:49:30,623 INFO L226 Difference]: Without dead ends: 31 [2021-02-21 15:49:30,624 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-02-21 15:49:30,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-02-21 15:49:30,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-02-21 15:49:30,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-02-21 15:49:30,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2021-02-21 15:49:30,641 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 25 [2021-02-21 15:49:30,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 15:49:30,641 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2021-02-21 15:49:30,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-21 15:49:30,642 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2021-02-21 15:49:30,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-21 15:49:30,645 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 15:49:30,645 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 15:49:30,645 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-21 15:49:30,645 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 15:49:30,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 15:49:30,646 INFO L82 PathProgramCache]: Analyzing trace with hash -766699319, now seen corresponding path program 1 times [2021-02-21 15:49:30,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 15:49:30,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681475737] [2021-02-21 15:49:30,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 15:49:30,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 15:49:30,675 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:30,676 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 15:49:30,677 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:30,677 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 15:49:30,681 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:30,682 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 15:49:30,686 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:30,687 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 15:49:30,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 15:49:30,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 15:49:30,723 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:30,724 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 15:49:30,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-02-21 15:49:30,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 15:49:30,740 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:30,740 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 15:49:30,741 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:30,742 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 15:49:30,749 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:30,750 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 15:49:30,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-02-21 15:49:30,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 15:49:30,771 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:30,771 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 15:49:30,772 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:30,773 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 15:49:30,783 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:30,783 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 15:49:30,793 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:30,794 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 15:49:30,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-02-21 15:49:30,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 15:49:30,803 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:30,804 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 15:49:30,804 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:30,805 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 15:49:30,806 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:49:30,806 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 15:49:30,809 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-02-21 15:49:30,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681475737] [2021-02-21 15:49:30,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 15:49:30,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-21 15:49:30,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229382029] [2021-02-21 15:49:30,811 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-21 15:49:30,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 15:49:30,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-21 15:49:30,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-02-21 15:49:30,812 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 9 states. [2021-02-21 15:49:31,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 15:49:31,099 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2021-02-21 15:49:31,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-21 15:49:31,100 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2021-02-21 15:49:31,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 15:49:31,100 INFO L225 Difference]: With dead ends: 31 [2021-02-21 15:49:31,101 INFO L226 Difference]: Without dead ends: 0 [2021-02-21 15:49:31,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-02-21 15:49:31,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-21 15:49:31,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-21 15:49:31,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-21 15:49:31,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-21 15:49:31,103 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 33 [2021-02-21 15:49:31,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 15:49:31,103 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-21 15:49:31,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-21 15:49:31,103 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-21 15:49:31,103 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-21 15:49:31,103 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-21 15:49:31,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-21 15:49:31,264 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-02-21 15:49:31,264 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-02-21 15:49:31,264 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-02-21 15:49:31,264 INFO L189 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-02-21 15:49:31,265 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-02-21 15:49:31,265 INFO L189 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-02-21 15:49:31,265 INFO L189 CegarLoopUtils]: For program point gcdFINAL(lines 17 28) no Hoare annotation was computed. [2021-02-21 15:49:31,265 INFO L185 CegarLoopUtils]: At program point L27(line 27) the Hoare annotation is: (and (= gcd_~y2 |gcd_#in~y2|) (<= (+ gcd_~y1 1) gcd_~y2) (= gcd_~y1 |gcd_#in~y1|) (<= 1 gcd_~y1)) [2021-02-21 15:49:31,265 INFO L189 CegarLoopUtils]: For program point gcdEXIT(lines 17 28) no Hoare annotation was computed. [2021-02-21 15:49:31,266 INFO L189 CegarLoopUtils]: For program point L27-1(line 27) no Hoare annotation was computed. [2021-02-21 15:49:31,266 INFO L185 CegarLoopUtils]: At program point L25(line 25) the Hoare annotation is: (and (<= 1 gcd_~y2) (<= (+ gcd_~y2 1) gcd_~y1) (= gcd_~y2 |gcd_#in~y2|) (= gcd_~y1 |gcd_#in~y1|)) [2021-02-21 15:49:31,266 INFO L189 CegarLoopUtils]: For program point L24(lines 24 26) no Hoare annotation was computed. [2021-02-21 15:49:31,266 INFO L189 CegarLoopUtils]: For program point L25-1(line 25) no Hoare annotation was computed. [2021-02-21 15:49:31,266 INFO L192 CegarLoopUtils]: At program point gcdENTRY(lines 17 28) the Hoare annotation is: true [2021-02-21 15:49:31,266 INFO L189 CegarLoopUtils]: For program point L21(lines 21 23) no Hoare annotation was computed. [2021-02-21 15:49:31,266 INFO L189 CegarLoopUtils]: For program point L18(lines 18 20) no Hoare annotation was computed. [2021-02-21 15:49:31,267 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-02-21 15:49:31,267 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-21 15:49:31,267 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-21 15:49:31,267 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-02-21 15:49:31,267 INFO L189 CegarLoopUtils]: For program point L32(lines 32 34) no Hoare annotation was computed. [2021-02-21 15:49:31,267 INFO L189 CegarLoopUtils]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 41) no Hoare annotation was computed. [2021-02-21 15:49:31,267 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 30 45) the Hoare annotation is: true [2021-02-21 15:49:31,267 INFO L189 CegarLoopUtils]: For program point mainEXIT(lines 30 45) no Hoare annotation was computed. [2021-02-21 15:49:31,267 INFO L189 CegarLoopUtils]: For program point L41(line 41) no Hoare annotation was computed. [2021-02-21 15:49:31,267 INFO L189 CegarLoopUtils]: For program point L40(lines 40 44) no Hoare annotation was computed. [2021-02-21 15:49:31,268 INFO L185 CegarLoopUtils]: At program point L39(line 39) the Hoare annotation is: (and (<= 1 main_~n~0) (<= 1 main_~m~0)) [2021-02-21 15:49:31,268 INFO L189 CegarLoopUtils]: For program point L40-1(lines 30 45) no Hoare annotation was computed. [2021-02-21 15:49:31,268 INFO L189 CegarLoopUtils]: For program point L39-1(line 39) no Hoare annotation was computed. [2021-02-21 15:49:31,268 INFO L189 CegarLoopUtils]: For program point L36(lines 36 38) no Hoare annotation was computed. [2021-02-21 15:49:31,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 03:49:31 BoogieIcfgContainer [2021-02-21 15:49:31,274 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 15:49:31,275 INFO L168 Benchmark]: Toolchain (without parser) took 5776.75 ms. Allocated memory was 175.1 MB in the beginning and 216.0 MB in the end (delta: 40.9 MB). Free memory was 151.0 MB in the beginning and 82.9 MB in the end (delta: 68.1 MB). Peak memory consumption was 110.0 MB. Max. memory is 8.0 GB. [2021-02-21 15:49:31,276 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 175.1 MB. Free memory is still 149.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 15:49:31,276 INFO L168 Benchmark]: CACSL2BoogieTranslator took 242.27 ms. Allocated memory is still 175.1 MB. Free memory was 149.9 MB in the beginning and 140.5 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-21 15:49:31,277 INFO L168 Benchmark]: Boogie Preprocessor took 36.08 ms. Allocated memory is still 175.1 MB. Free memory was 140.5 MB in the beginning and 139.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-21 15:49:31,277 INFO L168 Benchmark]: RCFGBuilder took 548.58 ms. Allocated memory is still 175.1 MB. Free memory was 138.9 MB in the beginning and 124.5 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-02-21 15:49:31,278 INFO L168 Benchmark]: TraceAbstraction took 4930.64 ms. Allocated memory was 175.1 MB in the beginning and 216.0 MB in the end (delta: 40.9 MB). Free memory was 123.9 MB in the beginning and 82.9 MB in the end (delta: 41.0 MB). Peak memory consumption was 82.8 MB. Max. memory is 8.0 GB. [2021-02-21 15:49:31,280 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 175.1 MB. Free memory is still 149.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 242.27 ms. Allocated memory is still 175.1 MB. Free memory was 149.9 MB in the beginning and 140.5 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 36.08 ms. Allocated memory is still 175.1 MB. Free memory was 140.5 MB in the beginning and 139.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 548.58 ms. Allocated memory is still 175.1 MB. Free memory was 138.9 MB in the beginning and 124.5 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4930.64 ms. Allocated memory was 175.1 MB in the beginning and 216.0 MB in the end (delta: 40.9 MB). Free memory was 123.9 MB in the beginning and 82.9 MB in the end (delta: 41.0 MB). Peak memory consumption was 82.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 41]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.6s, OverallIterations: 7, TraceHistogramMax: 3, AutomataDifference: 2.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 127 SDtfs, 205 SDslu, 211 SDs, 0 SdLazy, 634 SolverSat, 97 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 129 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 2.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 8 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 14 PreInvPairs, 14 NumberOfFragments, 72 HoareAnnotationTreeSize, 14 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 160 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 164 NumberOfCodeBlocks, 164 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 157 ConstructedInterpolants, 0 QuantifiedInterpolants, 12324 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 34/34 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...