/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 15:25:43,375 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 15:25:43,377 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 15:25:43,417 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 15:25:43,447 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 15:25:43,447 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 15:25:43,448 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 15:25:43,449 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 15:25:43,449 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 15:25:43,450 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 15:25:43,450 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 15:25:43,452 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 15:25:43,452 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 15:25:43,455 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 15:25:43,458 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 15:25:43,460 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 15:25:43,466 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 15:25:43,474 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 15:25:43,474 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 15:25:43,475 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 15:25:43,479 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 [2021-05-02 15:25:43,503 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 15:25:43,503 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 15:25:43,505 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 15:25:43,505 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 15:25:43,506 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 15:25:43,506 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 15:25:43,506 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 15:25:43,506 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 15:25:43,506 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 15:25:43,506 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 15:25:43,507 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 15:25:43,507 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 15:25:43,507 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 15:25:43,507 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 15:25:43,507 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 15:25:43,507 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 15:25:43,507 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 15:25:43,508 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 15:25:43,508 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 15:25:43,508 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 15:25:43,508 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:25:43,508 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 15:25:43,508 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 15:25:43,508 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 15:25:43,508 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 15:25:43,508 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 15:25:43,509 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 15:25:43,509 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 15:25:43,509 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 15:25:43,781 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 15:25:43,797 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 15:25:43,799 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 15:25:43,800 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 15:25:43,801 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 15:25:43,801 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound5.c [2021-05-02 15:25:43,852 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8653148fc/3ef6a9aee73645a79f65e0e78b668fc7/FLAG4d81c6876 [2021-05-02 15:25:44,286 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 15:25:44,289 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound5.c [2021-05-02 15:25:44,297 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8653148fc/3ef6a9aee73645a79f65e0e78b668fc7/FLAG4d81c6876 [2021-05-02 15:25:44,318 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8653148fc/3ef6a9aee73645a79f65e0e78b668fc7 [2021-05-02 15:25:44,320 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 15:25:44,323 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 15:25:44,325 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 15:25:44,326 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 15:25:44,330 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 15:25:44,331 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:25:44" (1/1) ... [2021-05-02 15:25:44,332 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b76d90a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:25:44, skipping insertion in model container [2021-05-02 15:25:44,332 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:25:44" (1/1) ... [2021-05-02 15:25:44,339 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 15:25:44,358 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 15:25:44,476 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound5.c[546,559] [2021-05-02 15:25:44,486 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:25:44,491 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 15:25:44,502 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound5.c[546,559] [2021-05-02 15:25:44,516 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:25:44,526 INFO L208 MainTranslator]: Completed translation [2021-05-02 15:25:44,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:25:44 WrapperNode [2021-05-02 15:25:44,527 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 15:25:44,528 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 15:25:44,528 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 15:25:44,528 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 15:25:44,589 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:25:44" (1/1) ... [2021-05-02 15:25:44,589 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:25:44" (1/1) ... [2021-05-02 15:25:44,596 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:25:44" (1/1) ... [2021-05-02 15:25:44,597 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:25:44" (1/1) ... [2021-05-02 15:25:44,602 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:25:44" (1/1) ... [2021-05-02 15:25:44,606 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:25:44" (1/1) ... [2021-05-02 15:25:44,607 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:25:44" (1/1) ... [2021-05-02 15:25:44,609 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 15:25:44,610 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 15:25:44,610 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 15:25:44,610 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 15:25:44,611 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:25:44" (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 [2021-05-02 15:25:44,768 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 15:25:44,768 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 15:25:44,768 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 15:25:44,769 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 15:25:44,769 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 15:25:44,769 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 15:25:44,769 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 15:25:44,769 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 15:25:44,770 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 15:25:44,770 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 15:25:44,770 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 15:25:44,770 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 15:25:44,771 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 15:25:44,771 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 15:25:44,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 15:25:44,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 15:25:44,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 15:25:44,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 15:25:44,773 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 15:25:44,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 15:25:45,057 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 15:25:45,058 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 15:25:45,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:25:45 BoogieIcfgContainer [2021-05-02 15:25:45,072 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 15:25:45,075 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 15:25:45,075 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 15:25:45,077 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 15:25:45,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 03:25:44" (1/3) ... [2021-05-02 15:25:45,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ee2fa61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:25:45, skipping insertion in model container [2021-05-02 15:25:45,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:25:44" (2/3) ... [2021-05-02 15:25:45,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ee2fa61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:25:45, skipping insertion in model container [2021-05-02 15:25:45,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:25:45" (3/3) ... [2021-05-02 15:25:45,079 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_unwindbound5.c [2021-05-02 15:25:45,083 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 15:25:45,086 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 15:25:45,102 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 15:25:45,135 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 15:25:45,135 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 15:25:45,135 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 15:25:45,135 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 15:25:45,135 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 15:25:45,135 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 15:25:45,136 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 15:25:45,136 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 15:25:45,164 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 15:25:45,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 15:25:45,170 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:45,170 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:25:45,171 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:45,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:45,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1191571617, now seen corresponding path program 1 times [2021-05-02 15:25:45,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:45,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018614733] [2021-05-02 15:25:45,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:45,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:45,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:25:45,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:45,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:25:45,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:45,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:25:45,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:45,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018614733] [2021-05-02 15:25:45,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018614733] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:25:45,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:25:45,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 15:25:45,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521562197] [2021-05-02 15:25:45,406 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 15:25:45,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:45,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 15:25:45,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:25:45,420 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 15:25:45,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:45,553 INFO L93 Difference]: Finished difference Result 66 states and 101 transitions. [2021-05-02 15:25:45,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 15:25:45,555 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-02 15:25:45,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:45,560 INFO L225 Difference]: With dead ends: 66 [2021-05-02 15:25:45,560 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 15:25:45,562 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 54.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:25:45,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 15:25:45,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-05-02 15:25:45,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 15:25:45,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-02 15:25:45,599 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2021-05-02 15:25:45,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:45,599 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-02 15:25:45,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 15:25:45,600 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-02 15:25:45,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 15:25:45,601 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:45,601 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:25:45,601 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 15:25:45,602 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:45,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:45,602 INFO L82 PathProgramCache]: Analyzing trace with hash 336486197, now seen corresponding path program 1 times [2021-05-02 15:25:45,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:45,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613450768] [2021-05-02 15:25:45,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:45,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:45,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:25:45,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:45,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:25:45,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:45,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:25:45,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:45,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613450768] [2021-05-02 15:25:45,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613450768] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:25:45,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:25:45,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 15:25:45,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541435905] [2021-05-02 15:25:45,734 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:25:45,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:45,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:25:45,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:25:45,735 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 15:25:46,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:46,031 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2021-05-02 15:25:46,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:25:46,032 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-02 15:25:46,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:46,033 INFO L225 Difference]: With dead ends: 47 [2021-05-02 15:25:46,033 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 15:25:46,034 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 164.0ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:25:46,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 15:25:46,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2021-05-02 15:25:46,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 15:25:46,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2021-05-02 15:25:46,045 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 18 [2021-05-02 15:25:46,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:46,046 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2021-05-02 15:25:46,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 15:25:46,046 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2021-05-02 15:25:46,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 15:25:46,047 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:46,047 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:25:46,047 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 15:25:46,047 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:46,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:46,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1819267188, now seen corresponding path program 1 times [2021-05-02 15:25:46,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:46,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254199824] [2021-05-02 15:25:46,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:46,062 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:25:46,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [418329462] [2021-05-02 15:25:46,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:25:46,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:46,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 15:25:46,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:25:46,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:46,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:46,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:46,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:46,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:46,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:25:46,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:46,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254199824] [2021-05-02 15:25:46,273 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:25:46,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418329462] [2021-05-02 15:25:46,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418329462] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:25:46,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:25:46,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 15:25:46,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061766273] [2021-05-02 15:25:46,274 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 15:25:46,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:46,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 15:25:46,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 15:25:46,274 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 15:25:46,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:46,289 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2021-05-02 15:25:46,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 15:25:46,290 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-02 15:25:46,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:46,291 INFO L225 Difference]: With dead ends: 52 [2021-05-02 15:25:46,291 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 15:25:46,291 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 15:25:46,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 15:25:46,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-02 15:25:46,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 15:25:46,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2021-05-02 15:25:46,300 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 20 [2021-05-02 15:25:46,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:46,301 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2021-05-02 15:25:46,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 15:25:46,301 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2021-05-02 15:25:46,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 15:25:46,302 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:46,302 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:25:46,521 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 15:25:46,521 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:46,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:46,522 INFO L82 PathProgramCache]: Analyzing trace with hash -784889968, now seen corresponding path program 1 times [2021-05-02 15:25:46,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:46,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598724913] [2021-05-02 15:25:46,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:46,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:46,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:25:46,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:46,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:25:46,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:46,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 15:25:46,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:46,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:25:46,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:46,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598724913] [2021-05-02 15:25:46,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598724913] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:25:46,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:25:46,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 15:25:46,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096831755] [2021-05-02 15:25:46,662 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:25:46,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:46,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:25:46,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:25:46,663 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:25:46,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:46,930 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2021-05-02 15:25:46,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:25:46,931 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 15:25:46,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:46,932 INFO L225 Difference]: With dead ends: 52 [2021-05-02 15:25:46,932 INFO L226 Difference]: Without dead ends: 50 [2021-05-02 15:25:46,932 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 164.7ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:25:46,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-02 15:25:46,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2021-05-02 15:25:46,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 15:25:46,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2021-05-02 15:25:46,937 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2021-05-02 15:25:46,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:46,937 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2021-05-02 15:25:46,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:25:46,937 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2021-05-02 15:25:46,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 15:25:46,938 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:46,938 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:25:46,938 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 15:25:46,938 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:46,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:46,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1024624683, now seen corresponding path program 1 times [2021-05-02 15:25:46,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:46,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205523247] [2021-05-02 15:25:46,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:46,946 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:25:46,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [570729369] [2021-05-02 15:25:46,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:25:47,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:47,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 15:25:47,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:25:47,117 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 15:25:47,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:47,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205523247] [2021-05-02 15:25:47,117 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:25:47,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570729369] [2021-05-02 15:25:47,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570729369] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:25:47,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:25:47,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 15:25:47,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683584619] [2021-05-02 15:25:47,118 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:25:47,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:47,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:25:47,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:25:47,119 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 15:25:47,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:47,274 INFO L93 Difference]: Finished difference Result 75 states and 96 transitions. [2021-05-02 15:25:47,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:25:47,274 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2021-05-02 15:25:47,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:47,275 INFO L225 Difference]: With dead ends: 75 [2021-05-02 15:25:47,275 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 15:25:47,276 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 54.8ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:25:47,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 15:25:47,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-05-02 15:25:47,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 38 states have internal predecessors, (44), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 15:25:47,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 73 transitions. [2021-05-02 15:25:47,287 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 73 transitions. Word has length 28 [2021-05-02 15:25:47,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:47,287 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 73 transitions. [2021-05-02 15:25:47,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 15:25:47,287 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 73 transitions. [2021-05-02 15:25:47,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 15:25:47,288 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:47,288 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:25:47,507 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:25:47,508 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:47,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:47,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1301357193, now seen corresponding path program 1 times [2021-05-02 15:25:47,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:47,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54377876] [2021-05-02 15:25:47,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:47,516 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:25:47,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1031652874] [2021-05-02 15:25:47,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:25:47,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:47,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 15:25:47,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:25:47,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:47,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:47,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:47,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:47,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:47,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:47,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:47,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:47,648 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 15:25:47,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:47,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54377876] [2021-05-02 15:25:47,648 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:25:47,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031652874] [2021-05-02 15:25:47,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031652874] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:25:47,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:25:47,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 15:25:47,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307083250] [2021-05-02 15:25:47,649 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 15:25:47,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:47,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 15:25:47,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:25:47,649 INFO L87 Difference]: Start difference. First operand 60 states and 73 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 15:25:47,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:47,679 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2021-05-02 15:25:47,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 15:25:47,680 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2021-05-02 15:25:47,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:47,681 INFO L225 Difference]: With dead ends: 76 [2021-05-02 15:25:47,681 INFO L226 Difference]: Without dead ends: 69 [2021-05-02 15:25:47,681 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 7.1ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:25:47,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-02 15:25:47,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2021-05-02 15:25:47,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 44 states have internal predecessors, (49), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 15:25:47,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2021-05-02 15:25:47,687 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 36 [2021-05-02 15:25:47,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:47,687 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2021-05-02 15:25:47,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 15:25:47,687 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2021-05-02 15:25:47,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 15:25:47,688 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:47,688 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:25:47,904 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:25:47,904 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:47,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:47,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1303085071, now seen corresponding path program 1 times [2021-05-02 15:25:47,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:47,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320639453] [2021-05-02 15:25:47,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:47,914 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:25:47,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2111663458] [2021-05-02 15:25:47,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:25:47,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:47,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 15:25:47,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:25:48,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:48,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:48,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:48,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:48,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:48,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:48,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:48,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:48,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:48,163 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 15:25:48,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:48,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320639453] [2021-05-02 15:25:48,163 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:25:48,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111663458] [2021-05-02 15:25:48,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111663458] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:25:48,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:25:48,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 15:25:48,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164900754] [2021-05-02 15:25:48,164 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 15:25:48,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:48,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 15:25:48,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:25:48,165 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:25:48,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:48,290 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2021-05-02 15:25:48,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 15:25:48,291 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2021-05-02 15:25:48,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:48,291 INFO L225 Difference]: With dead ends: 74 [2021-05-02 15:25:48,292 INFO L226 Difference]: Without dead ends: 58 [2021-05-02 15:25:48,292 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 92.5ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:25:48,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-02 15:25:48,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-05-02 15:25:48,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 37 states have internal predecessors, (42), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 15:25:48,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2021-05-02 15:25:48,297 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 36 [2021-05-02 15:25:48,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:48,297 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2021-05-02 15:25:48,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:25:48,298 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2021-05-02 15:25:48,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 15:25:48,298 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:48,298 INFO L523 BasicCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1] [2021-05-02 15:25:48,514 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:25:48,514 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:48,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:48,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1189074514, now seen corresponding path program 1 times [2021-05-02 15:25:48,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:48,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828556627] [2021-05-02 15:25:48,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:48,522 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:25:48,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [64722580] [2021-05-02 15:25:48,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:25:48,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:48,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 15:25:48,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:25:48,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:48,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:48,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:48,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:48,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:48,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:48,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:48,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:48,621 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 15:25:48,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:48,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828556627] [2021-05-02 15:25:48,621 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:25:48,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64722580] [2021-05-02 15:25:48,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64722580] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:25:48,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:25:48,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 15:25:48,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923593496] [2021-05-02 15:25:48,622 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 15:25:48,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:48,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 15:25:48,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:25:48,623 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 15:25:48,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:48,651 INFO L93 Difference]: Finished difference Result 74 states and 88 transitions. [2021-05-02 15:25:48,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 15:25:48,652 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 38 [2021-05-02 15:25:48,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:48,652 INFO L225 Difference]: With dead ends: 74 [2021-05-02 15:25:48,652 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 15:25:48,653 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.2ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:25:48,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 15:25:48,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-05-02 15:25:48,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 39 states have internal predecessors, (44), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 15:25:48,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2021-05-02 15:25:48,666 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 38 [2021-05-02 15:25:48,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:48,666 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2021-05-02 15:25:48,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 15:25:48,666 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2021-05-02 15:25:48,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 15:25:48,667 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:48,667 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:25:48,882 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:25:48,882 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:48,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:48,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1861890039, now seen corresponding path program 1 times [2021-05-02 15:25:48,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:48,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106100072] [2021-05-02 15:25:48,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:48,890 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:25:48,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [551110843] [2021-05-02 15:25:48,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:25:48,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:48,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 15:25:48,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:25:48,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:48,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:48,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:48,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:49,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:49,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:49,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:49,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:49,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:49,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:49,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:49,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:49,088 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 15:25:49,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:49,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106100072] [2021-05-02 15:25:49,089 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:25:49,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551110843] [2021-05-02 15:25:49,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551110843] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:25:49,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:25:49,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 15:25:49,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957845972] [2021-05-02 15:25:49,089 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 15:25:49,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:49,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 15:25:49,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:25:49,090 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 15:25:49,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:49,317 INFO L93 Difference]: Finished difference Result 101 states and 128 transitions. [2021-05-02 15:25:49,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 15:25:49,317 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 46 [2021-05-02 15:25:49,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:49,318 INFO L225 Difference]: With dead ends: 101 [2021-05-02 15:25:49,318 INFO L226 Difference]: Without dead ends: 86 [2021-05-02 15:25:49,319 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 77.1ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 15:25:49,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-02 15:25:49,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2021-05-02 15:25:49,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 52 states have (on average 1.1923076923076923) internal successors, (62), 54 states have internal predecessors, (62), 21 states have call successors, (21), 11 states have call predecessors, (21), 10 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 15:25:49,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 101 transitions. [2021-05-02 15:25:49,326 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 101 transitions. Word has length 46 [2021-05-02 15:25:49,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:49,326 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 101 transitions. [2021-05-02 15:25:49,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 15:25:49,326 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 101 transitions. [2021-05-02 15:25:49,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 15:25:49,327 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:49,327 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:25:49,545 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:25:49,545 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:49,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:49,545 INFO L82 PathProgramCache]: Analyzing trace with hash 243046571, now seen corresponding path program 1 times [2021-05-02 15:25:49,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:49,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895219411] [2021-05-02 15:25:49,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:49,552 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:25:49,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [626732059] [2021-05-02 15:25:49,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:25:49,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:49,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 15:25:49,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:25:49,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:49,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:49,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:49,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:49,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:49,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:49,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:49,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:49,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:49,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:49,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:49,741 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 15:25:49,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:49,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895219411] [2021-05-02 15:25:49,741 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:25:49,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626732059] [2021-05-02 15:25:49,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626732059] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:25:49,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:25:49,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 15:25:49,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735421925] [2021-05-02 15:25:49,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:25:49,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:49,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:25:49,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:25:49,742 INFO L87 Difference]: Start difference. First operand 84 states and 101 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 15:25:49,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:49,800 INFO L93 Difference]: Finished difference Result 101 states and 116 transitions. [2021-05-02 15:25:49,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 15:25:49,801 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 54 [2021-05-02 15:25:49,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:49,801 INFO L225 Difference]: With dead ends: 101 [2021-05-02 15:25:49,801 INFO L226 Difference]: Without dead ends: 93 [2021-05-02 15:25:49,802 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 9.8ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:25:49,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-02 15:25:49,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-05-02 15:25:49,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 60 states have internal predecessors, (67), 21 states have call successors, (21), 13 states have call predecessors, (21), 12 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 15:25:49,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 106 transitions. [2021-05-02 15:25:49,809 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 106 transitions. Word has length 54 [2021-05-02 15:25:49,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:49,809 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 106 transitions. [2021-05-02 15:25:49,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 15:25:49,810 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 106 transitions. [2021-05-02 15:25:49,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 15:25:49,810 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:49,810 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:25:50,025 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 15:25:50,025 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:50,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:50,026 INFO L82 PathProgramCache]: Analyzing trace with hash 244774449, now seen corresponding path program 1 times [2021-05-02 15:25:50,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:50,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203404078] [2021-05-02 15:25:50,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:50,034 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:25:50,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1899839377] [2021-05-02 15:25:50,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:25:50,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:50,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 15:25:50,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:25:50,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:50,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:50,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:50,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:50,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:50,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:50,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:50,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:50,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:50,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:50,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:50,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:50,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:50,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:50,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:50,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:50,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:50,435 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 15:25:50,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:50,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203404078] [2021-05-02 15:25:50,435 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:25:50,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899839377] [2021-05-02 15:25:50,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899839377] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:25:50,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:25:50,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 15:25:50,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743357549] [2021-05-02 15:25:50,436 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 15:25:50,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:50,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 15:25:50,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:25:50,437 INFO L87 Difference]: Start difference. First operand 92 states and 106 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 15:25:50,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:50,685 INFO L93 Difference]: Finished difference Result 98 states and 111 transitions. [2021-05-02 15:25:50,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 15:25:50,685 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 54 [2021-05-02 15:25:50,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:50,686 INFO L225 Difference]: With dead ends: 98 [2021-05-02 15:25:50,686 INFO L226 Difference]: Without dead ends: 90 [2021-05-02 15:25:50,686 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 188.4ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-02 15:25:50,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-05-02 15:25:50,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-05-02 15:25:50,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 58 states have (on average 1.1206896551724137) internal successors, (65), 59 states have internal predecessors, (65), 18 states have call successors, (18), 14 states have call predecessors, (18), 13 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 15:25:50,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2021-05-02 15:25:50,692 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 54 [2021-05-02 15:25:50,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:50,692 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2021-05-02 15:25:50,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 15:25:50,693 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2021-05-02 15:25:50,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-02 15:25:50,693 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:50,693 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:25:50,909 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-02 15:25:50,909 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:50,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:50,910 INFO L82 PathProgramCache]: Analyzing trace with hash -318333104, now seen corresponding path program 2 times [2021-05-02 15:25:50,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:50,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856571011] [2021-05-02 15:25:50,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:50,925 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:25:50,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [391252868] [2021-05-02 15:25:50,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:25:50,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-05-02 15:25:50,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:25:50,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 15:25:50,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:25:50,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:51,088 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-05-02 15:25:51,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:51,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856571011] [2021-05-02 15:25:51,089 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:25:51,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391252868] [2021-05-02 15:25:51,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391252868] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:25:51,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:25:51,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 15:25:51,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997454771] [2021-05-02 15:25:51,090 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 15:25:51,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:51,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 15:25:51,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 15:25:51,091 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:25:51,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:51,164 INFO L93 Difference]: Finished difference Result 104 states and 118 transitions. [2021-05-02 15:25:51,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:25:51,165 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 56 [2021-05-02 15:25:51,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:51,166 INFO L225 Difference]: With dead ends: 104 [2021-05-02 15:25:51,166 INFO L226 Difference]: Without dead ends: 102 [2021-05-02 15:25:51,167 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 33.0ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:25:51,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-05-02 15:25:51,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2021-05-02 15:25:51,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 67 states have internal predecessors, (75), 21 states have call successors, (21), 15 states have call predecessors, (21), 14 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 15:25:51,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 115 transitions. [2021-05-02 15:25:51,178 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 115 transitions. Word has length 56 [2021-05-02 15:25:51,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:51,178 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 115 transitions. [2021-05-02 15:25:51,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:25:51,178 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 115 transitions. [2021-05-02 15:25:51,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 15:25:51,179 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:51,179 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:25:51,398 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:25:51,399 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:51,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:51,399 INFO L82 PathProgramCache]: Analyzing trace with hash 940283669, now seen corresponding path program 1 times [2021-05-02 15:25:51,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:51,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654839582] [2021-05-02 15:25:51,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:51,411 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:25:51,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1722361244] [2021-05-02 15:25:51,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:25:51,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:51,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 15:25:51,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:25:51,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:51,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:51,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:51,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:51,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:51,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:51,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:51,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:51,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:51,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:51,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:51,566 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 36 proven. 46 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-05-02 15:25:51,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:51,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654839582] [2021-05-02 15:25:51,567 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:25:51,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722361244] [2021-05-02 15:25:51,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722361244] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:25:51,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:25:51,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 15:25:51,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546105246] [2021-05-02 15:25:51,568 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:25:51,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:51,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:25:51,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:25:51,569 INFO L87 Difference]: Start difference. First operand 101 states and 115 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 15:25:51,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:51,615 INFO L93 Difference]: Finished difference Result 128 states and 153 transitions. [2021-05-02 15:25:51,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:25:51,616 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) Word has length 61 [2021-05-02 15:25:51,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:51,619 INFO L225 Difference]: With dead ends: 128 [2021-05-02 15:25:51,619 INFO L226 Difference]: Without dead ends: 103 [2021-05-02 15:25:51,620 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 20.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:25:51,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-05-02 15:25:51,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-05-02 15:25:51,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 67 states have (on average 1.1492537313432836) internal successors, (77), 69 states have internal predecessors, (77), 21 states have call successors, (21), 15 states have call predecessors, (21), 14 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 15:25:51,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 117 transitions. [2021-05-02 15:25:51,627 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 117 transitions. Word has length 61 [2021-05-02 15:25:51,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:51,628 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 117 transitions. [2021-05-02 15:25:51,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 15:25:51,628 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 117 transitions. [2021-05-02 15:25:51,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-02 15:25:51,629 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:51,629 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:25:51,833 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:25:51,833 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:51,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:51,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1995039641, now seen corresponding path program 2 times [2021-05-02 15:25:51,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:51,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583803311] [2021-05-02 15:25:51,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:51,840 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:25:51,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [536350197] [2021-05-02 15:25:51,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:25:51,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:25:51,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:25:51,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-02 15:25:51,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:25:52,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:52,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:52,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:52,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:52,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:52,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:52,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:52,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:52,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:52,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:52,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:52,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:52,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:52,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:52,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:52,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:52,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:52,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:52,278 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 43 proven. 34 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-05-02 15:25:52,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:52,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583803311] [2021-05-02 15:25:52,278 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:25:52,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536350197] [2021-05-02 15:25:52,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536350197] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:25:52,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:25:52,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 15:25:52,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082946523] [2021-05-02 15:25:52,279 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 15:25:52,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:52,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 15:25:52,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-02 15:25:52,279 INFO L87 Difference]: Start difference. First operand 103 states and 117 transitions. Second operand has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 10 states have internal predecessors, (24), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 15:25:52,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:52,598 INFO L93 Difference]: Finished difference Result 163 states and 207 transitions. [2021-05-02 15:25:52,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 15:25:52,599 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 10 states have internal predecessors, (24), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) Word has length 64 [2021-05-02 15:25:52,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:52,599 INFO L225 Difference]: With dead ends: 163 [2021-05-02 15:25:52,599 INFO L226 Difference]: Without dead ends: 131 [2021-05-02 15:25:52,600 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 150.2ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-05-02 15:25:52,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-05-02 15:25:52,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 125. [2021-05-02 15:25:52,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 80 states have (on average 1.175) internal successors, (94), 83 states have internal predecessors, (94), 28 states have call successors, (28), 17 states have call predecessors, (28), 16 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-02 15:25:52,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 148 transitions. [2021-05-02 15:25:52,608 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 148 transitions. Word has length 64 [2021-05-02 15:25:52,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:52,608 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 148 transitions. [2021-05-02 15:25:52,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 10 states have internal predecessors, (24), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 15:25:52,609 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 148 transitions. [2021-05-02 15:25:52,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 15:25:52,609 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:52,609 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:25:52,826 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 15:25:52,826 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:52,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:52,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1140868055, now seen corresponding path program 1 times [2021-05-02 15:25:52,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:52,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815680569] [2021-05-02 15:25:52,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:52,832 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:25:52,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2071354201] [2021-05-02 15:25:52,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:25:52,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:52,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 15:25:52,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:25:52,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:52,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:52,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:52,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:52,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:52,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:53,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:53,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:53,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:53,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:53,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:53,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:53,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:53,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:53,064 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 16 proven. 92 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 15:25:53,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:53,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815680569] [2021-05-02 15:25:53,064 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:25:53,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071354201] [2021-05-02 15:25:53,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071354201] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:25:53,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:25:53,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 15:25:53,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719657501] [2021-05-02 15:25:53,065 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 15:25:53,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:53,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 15:25:53,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 15:25:53,067 INFO L87 Difference]: Start difference. First operand 125 states and 148 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 15:25:53,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:53,133 INFO L93 Difference]: Finished difference Result 151 states and 173 transitions. [2021-05-02 15:25:53,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:25:53,134 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 68 [2021-05-02 15:25:53,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:53,135 INFO L225 Difference]: With dead ends: 151 [2021-05-02 15:25:53,136 INFO L226 Difference]: Without dead ends: 138 [2021-05-02 15:25:53,137 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 20.2ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:25:53,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-05-02 15:25:53,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2021-05-02 15:25:53,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 90 states have (on average 1.1444444444444444) internal successors, (103), 92 states have internal predecessors, (103), 28 states have call successors, (28), 19 states have call predecessors, (28), 18 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-02 15:25:53,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 157 transitions. [2021-05-02 15:25:53,147 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 157 transitions. Word has length 68 [2021-05-02 15:25:53,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:53,148 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 157 transitions. [2021-05-02 15:25:53,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 15:25:53,148 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 157 transitions. [2021-05-02 15:25:53,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 15:25:53,148 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:53,148 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:25:53,365 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-02 15:25:53,365 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:53,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:53,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1142595933, now seen corresponding path program 1 times [2021-05-02 15:25:53,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:53,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647208703] [2021-05-02 15:25:53,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:53,379 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:25:53,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1113280714] [2021-05-02 15:25:53,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:25:53,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:53,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 15:25:53,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:25:53,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:53,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:53,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:53,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:53,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:53,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:53,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:53,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:53,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:53,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:53,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:53,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:53,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:53,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:53,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:53,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:53,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:53,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:53,843 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-05-02 15:25:53,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:53,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647208703] [2021-05-02 15:25:53,843 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:25:53,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113280714] [2021-05-02 15:25:53,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113280714] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:25:53,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:25:53,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 15:25:53,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614451242] [2021-05-02 15:25:53,844 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 15:25:53,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:53,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 15:25:53,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:25:53,845 INFO L87 Difference]: Start difference. First operand 137 states and 157 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 15:25:54,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:54,030 INFO L93 Difference]: Finished difference Result 151 states and 176 transitions. [2021-05-02 15:25:54,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 15:25:54,030 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 68 [2021-05-02 15:25:54,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:54,031 INFO L225 Difference]: With dead ends: 151 [2021-05-02 15:25:54,031 INFO L226 Difference]: Without dead ends: 149 [2021-05-02 15:25:54,032 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 168.8ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-02 15:25:54,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-05-02 15:25:54,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 147. [2021-05-02 15:25:54,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 97 states have (on average 1.1649484536082475) internal successors, (113), 99 states have internal predecessors, (113), 30 states have call successors, (30), 20 states have call predecessors, (30), 19 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-02 15:25:54,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 171 transitions. [2021-05-02 15:25:54,041 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 171 transitions. Word has length 68 [2021-05-02 15:25:54,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:54,042 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 171 transitions. [2021-05-02 15:25:54,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 15:25:54,042 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 171 transitions. [2021-05-02 15:25:54,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-02 15:25:54,042 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:54,042 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:25:54,274 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 15:25:54,274 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:54,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:54,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1390565976, now seen corresponding path program 2 times [2021-05-02 15:25:54,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:54,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108784017] [2021-05-02 15:25:54,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:54,279 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:25:54,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [695397419] [2021-05-02 15:25:54,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:25:54,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:25:54,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:25:54,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 15:25:54,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:25:54,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:54,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:54,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:54,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:54,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:54,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:54,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:54,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:54,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:54,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:54,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:54,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:54,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:54,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:54,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:54,686 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 46 proven. 24 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-05-02 15:25:54,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:54,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108784017] [2021-05-02 15:25:54,687 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:25:54,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695397419] [2021-05-02 15:25:54,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695397419] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:25:54,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:25:54,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 15:25:54,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067496819] [2021-05-02 15:25:54,689 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 15:25:54,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:54,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 15:25:54,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:25:54,690 INFO L87 Difference]: Start difference. First operand 147 states and 171 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2021-05-02 15:25:54,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:54,923 INFO L93 Difference]: Finished difference Result 174 states and 206 transitions. [2021-05-02 15:25:54,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 15:25:54,923 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) Word has length 73 [2021-05-02 15:25:54,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:54,924 INFO L225 Difference]: With dead ends: 174 [2021-05-02 15:25:54,924 INFO L226 Difference]: Without dead ends: 149 [2021-05-02 15:25:54,925 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 126.7ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 15:25:54,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-05-02 15:25:54,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2021-05-02 15:25:54,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 97 states have (on average 1.134020618556701) internal successors, (110), 100 states have internal predecessors, (110), 31 states have call successors, (31), 21 states have call predecessors, (31), 20 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-02 15:25:54,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 169 transitions. [2021-05-02 15:25:54,933 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 169 transitions. Word has length 73 [2021-05-02 15:25:54,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:54,934 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 169 transitions. [2021-05-02 15:25:54,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2021-05-02 15:25:54,934 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 169 transitions. [2021-05-02 15:25:54,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-02 15:25:54,934 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:54,935 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:25:55,151 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:25:55,151 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:55,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:55,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1792978632, now seen corresponding path program 1 times [2021-05-02 15:25:55,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:55,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709870609] [2021-05-02 15:25:55,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:55,158 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:25:55,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1091344413] [2021-05-02 15:25:55,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:25:55,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:55,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 15:25:55,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:25:55,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:55,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:55,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:55,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:55,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:55,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:55,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:55,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:55,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:55,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:55,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:55,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:55,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:55,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:55,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:55,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:55,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:55,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:55,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:55,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:55,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:55,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:55,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:55,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:55,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:55,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:55,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:55,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:55,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:55,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:01,511 WARN L205 SmtUtils]: Spent 5.71 s on a formula simplification. DAG size of input: 87 DAG size of output: 83 [2021-05-02 15:26:01,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:01,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:01,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:01,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:01,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:02,046 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2021-05-02 15:26:02,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:02,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:02,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:02,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:02,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:02,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:02,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:02,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:02,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:02,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:02,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:02,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:02,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:02,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:02,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:02,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:02,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:02,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:02,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:02,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:02,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:02,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:10,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:10,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:10,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:10,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:10,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:10,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:10,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:10,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:10,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:10,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:10,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:10,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:10,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:10,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:10,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:10,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:10,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:10,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:10,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:10,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:11,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:11,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:11,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:11,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:11,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:11,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:11,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:11,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:11,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:11,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:11,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:12,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:12,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:12,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:12,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:12,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:12,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:12,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:12,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:12,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:12,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:12,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:12,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:12,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:12,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:12,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:12,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:12,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:12,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:13,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:13,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:13,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:13,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:13,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:13,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:13,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:14,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:14,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:14,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:14,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:14,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:14,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:14,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:14,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:14,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:14,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:14,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:14,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:14,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:15,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:15,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:15,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:15,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:15,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:15,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:15,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:15,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:15,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:15,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:15,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:15,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:15,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:15,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:15,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:15,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:15,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:15,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:15,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:15,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:15,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:15,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:15,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:15,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:15,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:15,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:15,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:15,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:15,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:15,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:15,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:16,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:16,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:16,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:16,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:16,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:16,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:16,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:16,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:16,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:16,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:16,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:16,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:16,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:16,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:16,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:16,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:16,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:16,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:16,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:16,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:16,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:16,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:16,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:16,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:16,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:16,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:16,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:16,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:16,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:16,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:16,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:16,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:16,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:17,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:17,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:17,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:17,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:17,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:17,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:17,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:17,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:17,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:17,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:17,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:17,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:17,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:17,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:17,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:17,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:17,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:17,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:17,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:17,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:17,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:17,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:17,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:17,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:17,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:17,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:17,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:17,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:17,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:17,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:18,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:18,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:18,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:18,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:18,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:18,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:18,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:18,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:18,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:18,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:18,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:18,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:18,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:18,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:18,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:18,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:18,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:18,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:18,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:18,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:18,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:18,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:18,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:18,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:18,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:18,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:18,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:18,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:18,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:18,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:18,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:18,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:18,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:12,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:30:12,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709870609] [2021-05-02 15:30:12,635 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:30:12,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091344413] [2021-05-02 15:30:12,635 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: -1836939766 [2021-05-02 15:30:12,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:30:12,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-05-02 15:30:12,635 ERROR L212 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-05-02 15:30:12,635 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 15:30:12,853 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 15:30:12,870 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-02 15:30:12,871 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 03:30:12 BoogieIcfgContainer [2021-05-02 15:30:12,871 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 15:30:12,871 INFO L168 Benchmark]: Toolchain (without parser) took 268548.79 ms. Allocated memory was 186.6 MB in the beginning and 7.3 GB in the end (delta: 7.1 GB). Free memory was 149.9 MB in the beginning and 5.4 GB in the end (delta: -5.3 GB). Peak memory consumption was 4.9 GB. Max. memory is 8.0 GB. [2021-05-02 15:30:12,871 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 186.6 MB. Free memory is still 166.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 15:30:12,871 INFO L168 Benchmark]: CACSL2BoogieTranslator took 201.92 ms. Allocated memory is still 186.6 MB. Free memory was 149.7 MB in the beginning and 139.2 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-02 15:30:12,871 INFO L168 Benchmark]: Boogie Preprocessor took 81.55 ms. Allocated memory is still 186.6 MB. Free memory was 139.2 MB in the beginning and 168.9 MB in the end (delta: -29.7 MB). Peak memory consumption was 2.4 MB. Max. memory is 8.0 GB. [2021-05-02 15:30:12,872 INFO L168 Benchmark]: RCFGBuilder took 462.53 ms. Allocated memory is still 186.6 MB. Free memory was 168.9 MB in the beginning and 152.1 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-02 15:30:12,872 INFO L168 Benchmark]: TraceAbstraction took 267796.30 ms. Allocated memory was 186.6 MB in the beginning and 7.3 GB in the end (delta: 7.1 GB). Free memory was 151.6 MB in the beginning and 5.4 GB in the end (delta: -5.3 GB). Peak memory consumption was 4.9 GB. Max. memory is 8.0 GB. [2021-05-02 15:30:12,872 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 186.6 MB. Free memory is still 166.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 201.92 ms. Allocated memory is still 186.6 MB. Free memory was 149.7 MB in the beginning and 139.2 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 81.55 ms. Allocated memory is still 186.6 MB. Free memory was 139.2 MB in the beginning and 168.9 MB in the end (delta: -29.7 MB). Peak memory consumption was 2.4 MB. Max. memory is 8.0 GB. * RCFGBuilder took 462.53 ms. Allocated memory is still 186.6 MB. Free memory was 168.9 MB in the beginning and 152.1 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 267796.30 ms. Allocated memory was 186.6 MB in the beginning and 7.3 GB in the end (delta: 7.1 GB). Free memory was 151.6 MB in the beginning and 5.4 GB in the end (delta: -5.3 GB). Peak memory consumption was 4.9 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L22] int counter = 0; [L24] unsigned int A, B; [L25] long long r, d, p, q; [L26] A = __VERIFIER_nondet_unsigned_int() [L27] B = __VERIFIER_nondet_unsigned_int() [L28] CALL assume_abort_if_not(B >= 1) [L12] COND FALSE !(!cond) [L28] RET assume_abort_if_not(B >= 1) [L30] r = A [L31] d = B [L32] p = 1 [L33] q = 0 [L35] EXPR counter++ [L35] COND TRUE counter++<5 [L36] CALL __VERIFIER_assert(q == 0) [L15] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(q == 0) [L37] CALL __VERIFIER_assert(r == A) [L15] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(r == A) [L38] CALL __VERIFIER_assert(d == B * p) [L15] COND FALSE !(!(cond)) [L38] RET __VERIFIER_assert(d == B * p) [L39] COND FALSE !(!(r >= d)) [L41] d = 2 * d [L42] p = 2 * p [L35] EXPR counter++ [L35] COND TRUE counter++<5 [L36] CALL __VERIFIER_assert(q == 0) [L15] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(q == 0) [L37] CALL __VERIFIER_assert(r == A) [L15] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(r == A) [L38] CALL __VERIFIER_assert(d == B * p) [L15] COND FALSE !(!(cond)) [L38] RET __VERIFIER_assert(d == B * p) [L39] COND TRUE !(r >= d) [L45] EXPR counter++ [L45] COND TRUE counter++<5 [L46] CALL __VERIFIER_assert(A == q*B + r) [L15] COND FALSE !(!(cond)) [L46] RET __VERIFIER_assert(A == q*B + r) [L47] CALL __VERIFIER_assert(d == B*p) [L15] COND FALSE !(!(cond)) [L47] RET __VERIFIER_assert(d == B*p) [L49] COND FALSE !(!(p != 1)) [L51] d = d / 2 [L52] p = p / 2 [L53] COND TRUE r >= d [L54] r = r - d [L55] q = q + p [L45] EXPR counter++ [L45] COND TRUE counter++<5 [L46] CALL __VERIFIER_assert(A == q*B + r) [L15] COND FALSE !(!(cond)) [L46] RET __VERIFIER_assert(A == q*B + r) [L47] CALL __VERIFIER_assert(d == B*p) [L15] COND FALSE !(!(cond)) [L47] RET __VERIFIER_assert(d == B*p) [L49] COND TRUE !(p != 1) [L59] CALL __VERIFIER_assert(A == d*q + r) [L15] COND TRUE !(cond) [L17] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 267720.9ms, OverallIterations: 18, TraceHistogramMax: 11, EmptinessCheckTime: 20.9ms, AutomataDifference: 2573.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 23.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 711 SDtfs, 363 SDslu, 2676 SDs, 0 SdLazy, 2091 SolverSat, 226 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1384.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 750 GetRequests, 616 SyntacticMatches, 2 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1349.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=149occurred in iteration=17, InterpolantAutomatonStates: 136, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 157.6ms AutomataMinimizationTime, 17 MinimizatonAttempts, 32 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 123.5ms SsaConstructionTime, 505.2ms SatisfiabilityAnalysisTime, 2722.6ms InterpolantComputationTime, 761 NumberOfCodeBlocks, 725 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 744 ConstructedInterpolants, 0 QuantifiedInterpolants, 3559 SizeOfPredicates, 52 NumberOfNonLiveVariables, 2411 ConjunctsInSsa, 260 ConjunctsInUnsatCore, 17 InterpolantComputations, 7 PerfectInterpolantSequences, 788/1056 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process Received shutdown request...