/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/egcd2-ll_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 14:52:29,043 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 14:52:29,045 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 14:52:29,078 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 14:52:29,099 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 14:52:29,101 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 14:52:29,102 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 14:52:29,103 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 14:52:29,104 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 14:52:29,104 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 14:52:29,108 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 14:52:29,112 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 14:52:29,113 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 14:52:29,116 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 14:52:29,117 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 14:52:29,117 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 14:52:29,119 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 14:52:29,123 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 14:52:29,124 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 14:52:29,124 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 14:52:29,128 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 14:52:29,151 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 14:52:29,151 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 14:52:29,152 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 14:52:29,152 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 14:52:29,152 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 14:52:29,152 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 14:52:29,154 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 14:52:29,154 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 14:52:29,154 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 14:52:29,155 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 14:52:29,155 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 14:52:29,155 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 14:52:29,156 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 14:52:29,156 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 14:52:29,156 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 14:52:29,156 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 14:52:29,156 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 14:52:29,156 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 14:52:29,156 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 14:52:29,156 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 14:52:29,156 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 14:52:29,157 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 14:52:29,157 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 14:52:29,157 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 14:52:29,157 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 14:52:29,157 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 14:52:29,157 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 14:52:29,157 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 14:52:29,157 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 14:52:29,454 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 14:52:29,481 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 14:52:29,482 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 14:52:29,483 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 14:52:29,484 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 14:52:29,484 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound1.c [2021-05-02 14:52:29,530 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8161e3250/302ab6b0b7fc4d6f928447e487be8b36/FLAG5da24b15e [2021-05-02 14:52:29,917 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 14:52:29,918 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound1.c [2021-05-02 14:52:29,924 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8161e3250/302ab6b0b7fc4d6f928447e487be8b36/FLAG5da24b15e [2021-05-02 14:52:29,935 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8161e3250/302ab6b0b7fc4d6f928447e487be8b36 [2021-05-02 14:52:29,937 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 14:52:29,939 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 14:52:29,940 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 14:52:29,940 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 14:52:29,943 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 14:52:29,944 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:52:29" (1/1) ... [2021-05-02 14:52:29,945 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b10642f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:52:29, skipping insertion in model container [2021-05-02 14:52:29,945 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:52:29" (1/1) ... [2021-05-02 14:52:29,949 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 14:52:29,964 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 14:52:30,061 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/egcd2-ll_valuebound1.c[490,503] [2021-05-02 14:52:30,074 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:52:30,089 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 14:52:30,137 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/egcd2-ll_valuebound1.c[490,503] [2021-05-02 14:52:30,153 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:52:30,168 INFO L208 MainTranslator]: Completed translation [2021-05-02 14:52:30,168 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:52:30 WrapperNode [2021-05-02 14:52:30,168 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 14:52:30,169 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 14:52:30,169 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 14:52:30,169 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 14:52:30,177 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:52:30" (1/1) ... [2021-05-02 14:52:30,178 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:52:30" (1/1) ... [2021-05-02 14:52:30,190 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:52:30" (1/1) ... [2021-05-02 14:52:30,190 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:52:30" (1/1) ... [2021-05-02 14:52:30,202 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:52:30" (1/1) ... [2021-05-02 14:52:30,205 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:52:30" (1/1) ... [2021-05-02 14:52:30,205 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:52:30" (1/1) ... [2021-05-02 14:52:30,207 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 14:52:30,207 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 14:52:30,207 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 14:52:30,208 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 14:52:30,208 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:52:30" (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 14:52:30,264 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 14:52:30,264 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 14:52:30,264 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 14:52:30,264 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 14:52:30,265 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 14:52:30,265 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 14:52:30,265 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 14:52:30,265 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 14:52:30,265 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 14:52:30,265 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 14:52:30,265 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 14:52:30,265 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 14:52:30,265 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 14:52:30,265 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 14:52:30,265 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 14:52:30,265 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 14:52:30,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 14:52:30,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 14:52:30,266 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 14:52:30,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 14:52:30,440 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 14:52:30,440 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 14:52:30,441 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:52:30 BoogieIcfgContainer [2021-05-02 14:52:30,441 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 14:52:30,442 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 14:52:30,442 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 14:52:30,444 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 14:52:30,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 02:52:29" (1/3) ... [2021-05-02 14:52:30,445 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e2cca7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:52:30, skipping insertion in model container [2021-05-02 14:52:30,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:52:30" (2/3) ... [2021-05-02 14:52:30,445 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e2cca7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:52:30, skipping insertion in model container [2021-05-02 14:52:30,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:52:30" (3/3) ... [2021-05-02 14:52:30,446 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound1.c [2021-05-02 14:52:30,450 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 14:52:30,452 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 14:52:30,463 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 14:52:30,478 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 14:52:30,478 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 14:52:30,478 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 14:52:30,478 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 14:52:30,478 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 14:52:30,478 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 14:52:30,479 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 14:52:30,479 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 14:52:30,489 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 14:52:30,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 14:52:30,495 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:52:30,496 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 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 14:52:30,496 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:52:30,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:52:30,500 INFO L82 PathProgramCache]: Analyzing trace with hash -587582002, now seen corresponding path program 1 times [2021-05-02 14:52:30,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:52:30,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359941121] [2021-05-02 14:52:30,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:52:30,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:52:30,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 14:52:30,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:52:30,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 14:52:30,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:52:30,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 14:52:30,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:52:30,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 14:52:30,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:52:30,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 14:52:30,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:52:30,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-05-02 14:52:30,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:52:30,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-05-02 14:52:30,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:52:30,801 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 14:52:30,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:52:30,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359941121] [2021-05-02 14:52:30,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359941121] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:52:30,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:52:30,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 14:52:30,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408684605] [2021-05-02 14:52:30,808 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 14:52:30,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:52:30,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 14:52:30,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:52:30,818 INFO L87 Difference]: Start difference. First operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) 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, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 14:52:30,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:52:30,997 INFO L93 Difference]: Finished difference Result 73 states and 118 transitions. [2021-05-02 14:52:30,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 14:52:30,999 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, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2021-05-02 14:52:30,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:52:31,004 INFO L225 Difference]: With dead ends: 73 [2021-05-02 14:52:31,004 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 14:52:31,008 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:52:31,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 14:52:31,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 14:52:31,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 14:52:31,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2021-05-02 14:52:31,057 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 43 [2021-05-02 14:52:31,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:52:31,057 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2021-05-02 14:52:31,058 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, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 14:52:31,058 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2021-05-02 14:52:31,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 14:52:31,059 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:52:31,060 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 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 14:52:31,060 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 14:52:31,061 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:52:31,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:52:31,061 INFO L82 PathProgramCache]: Analyzing trace with hash 987777007, now seen corresponding path program 1 times [2021-05-02 14:52:31,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:52:31,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131088185] [2021-05-02 14:52:31,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:52:31,087 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:52:31,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1413929982] [2021-05-02 14:52:31,088 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 14:52:31,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:52:31,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 14:52:31,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:52:31,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:31,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:31,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:31,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:31,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:31,347 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-05-02 14:52:31,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:52:31,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131088185] [2021-05-02 14:52:31,348 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:52:31,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413929982] [2021-05-02 14:52:31,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413929982] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:52:31,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:52:31,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 14:52:31,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431524048] [2021-05-02 14:52:31,350 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 14:52:31,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:52:31,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 14:52:31,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:52:31,351 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 14:52:31,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:52:31,439 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2021-05-02 14:52:31,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 14:52:31,440 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2021-05-02 14:52:31,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:52:31,441 INFO L225 Difference]: With dead ends: 52 [2021-05-02 14:52:31,441 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 14:52:31,442 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 26.5ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:52:31,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 14:52:31,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-05-02 14:52:31,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 14:52:31,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2021-05-02 14:52:31,449 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 44 [2021-05-02 14:52:31,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:52:31,449 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2021-05-02 14:52:31,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 14:52:31,450 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2021-05-02 14:52:31,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 14:52:31,450 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:52:31,451 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 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 14:52:31,667 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 14:52:31,667 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:52:31,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:52:31,667 INFO L82 PathProgramCache]: Analyzing trace with hash 561616070, now seen corresponding path program 1 times [2021-05-02 14:52:31,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:52:31,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911281642] [2021-05-02 14:52:31,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:52:31,678 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:52:31,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [662817652] [2021-05-02 14:52:31,678 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 14:52:31,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:52:31,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 14:52:31,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:52:31,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:31,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:31,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:31,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:31,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:31,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:31,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:31,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:31,826 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-02 14:52:31,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:52:31,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911281642] [2021-05-02 14:52:31,826 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:52:31,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662817652] [2021-05-02 14:52:31,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662817652] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:52:31,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:52:31,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 14:52:31,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329807119] [2021-05-02 14:52:31,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:52:31,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:52:31,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:52:31,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:52:31,828 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 14:52:31,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:52:31,948 INFO L93 Difference]: Finished difference Result 57 states and 77 transitions. [2021-05-02 14:52:31,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:52:31,948 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 45 [2021-05-02 14:52:31,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:52:31,949 INFO L225 Difference]: With dead ends: 57 [2021-05-02 14:52:31,949 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 14:52:31,949 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 50.0ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:52:31,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 14:52:31,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2021-05-02 14:52:31,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 14:52:31,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2021-05-02 14:52:31,956 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 45 [2021-05-02 14:52:31,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:52:31,956 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2021-05-02 14:52:31,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 14:52:31,957 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2021-05-02 14:52:31,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 14:52:31,957 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:52:31,957 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 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, 1, 1, 1, 1] [2021-05-02 14:52:32,174 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:52:32,174 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:52:32,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:52:32,175 INFO L82 PathProgramCache]: Analyzing trace with hash -680064098, now seen corresponding path program 1 times [2021-05-02 14:52:32,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:52:32,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760923569] [2021-05-02 14:52:32,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:52:32,184 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:52:32,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1547978880] [2021-05-02 14:52:32,184 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 14:52:32,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:52:32,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 14:52:32,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:52:32,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:32,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:32,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:32,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:32,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:32,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:32,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:32,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:32,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:32,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:32,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:32,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:32,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:32,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:32,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:32,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:32,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:32,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:32,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:32,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:32,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:32,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:32,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:32,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:32,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:32,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:32,507 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-02 14:52:32,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:52:32,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760923569] [2021-05-02 14:52:32,507 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:52:32,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547978880] [2021-05-02 14:52:32,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547978880] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:52:32,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:52:32,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:52:32,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671519597] [2021-05-02 14:52:32,508 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:52:32,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:52:32,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:52:32,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:52:32,509 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2021-05-02 14:52:32,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:52:32,613 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2021-05-02 14:52:32,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:52:32,614 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 50 [2021-05-02 14:52:32,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:52:32,615 INFO L225 Difference]: With dead ends: 56 [2021-05-02 14:52:32,616 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 14:52:32,616 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 91.7ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:52:32,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 14:52:32,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-05-02 14:52:32,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 30 states have internal predecessors, (32), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 14:52:32,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2021-05-02 14:52:32,624 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 50 [2021-05-02 14:52:32,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:52:32,624 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2021-05-02 14:52:32,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2021-05-02 14:52:32,624 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2021-05-02 14:52:32,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 14:52:32,625 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:52:32,625 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 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, 1, 1, 1, 1, 1] [2021-05-02 14:52:32,841 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:52:32,842 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:52:32,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:52:32,842 INFO L82 PathProgramCache]: Analyzing trace with hash 606548870, now seen corresponding path program 1 times [2021-05-02 14:52:32,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:52:32,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908836200] [2021-05-02 14:52:32,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:52:32,851 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:52:32,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1454485589] [2021-05-02 14:52:32,851 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 14:52:32,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:52:32,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 14:52:32,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:52:32,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:32,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:32,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:32,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:32,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:32,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:32,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:32,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:33,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:33,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:33,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:33,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:33,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:33,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:33,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:33,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:33,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:33,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:33,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:33,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:33,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:33,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:33,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:33,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:33,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:33,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:33,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:33,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:33,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:33,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:33,184 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 14:52:33,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:52:33,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908836200] [2021-05-02 14:52:33,184 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:52:33,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454485589] [2021-05-02 14:52:33,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454485589] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:52:33,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:52:33,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:52:33,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701572779] [2021-05-02 14:52:33,185 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:52:33,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:52:33,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:52:33,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:52:33,186 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 14:52:33,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:52:33,316 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2021-05-02 14:52:33,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:52:33,316 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 55 [2021-05-02 14:52:33,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:52:33,317 INFO L225 Difference]: With dead ends: 60 [2021-05-02 14:52:33,317 INFO L226 Difference]: Without dead ends: 58 [2021-05-02 14:52:33,317 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 107.2ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:52:33,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-02 14:52:33,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2021-05-02 14:52:33,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 33 states have internal predecessors, (35), 19 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 14:52:33,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2021-05-02 14:52:33,325 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 55 [2021-05-02 14:52:33,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:52:33,326 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2021-05-02 14:52:33,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 14:52:33,326 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2021-05-02 14:52:33,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-02 14:52:33,326 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:52:33,326 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 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, 1, 1, 1, 1, 1, 1] [2021-05-02 14:52:33,543 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:52:33,543 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:52:33,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:52:33,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1584976990, now seen corresponding path program 1 times [2021-05-02 14:52:33,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:52:33,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29716281] [2021-05-02 14:52:33,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:52:33,552 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:52:33,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [738171581] [2021-05-02 14:52:33,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:52:33,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:52:33,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 14:52:33,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:52:33,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:33,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:33,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:33,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:33,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:33,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:33,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:33,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:33,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:33,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:33,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:33,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:33,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:33,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:33,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:33,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:33,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:33,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:33,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:33,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:33,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:33,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:33,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:33,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:33,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:33,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:33,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:33,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:33,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:33,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:33,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:33,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:33,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:33,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:33,840 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 14 proven. 25 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-05-02 14:52:33,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:52:33,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29716281] [2021-05-02 14:52:33,840 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:52:33,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738171581] [2021-05-02 14:52:33,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738171581] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:52:33,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:52:33,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 14:52:33,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610185629] [2021-05-02 14:52:33,841 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 14:52:33,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:52:33,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 14:52:33,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:52:33,842 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 14:52:34,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:52:34,022 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2021-05-02 14:52:34,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 14:52:34,023 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 60 [2021-05-02 14:52:34,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:52:34,027 INFO L225 Difference]: With dead ends: 66 [2021-05-02 14:52:34,028 INFO L226 Difference]: Without dead ends: 64 [2021-05-02 14:52:34,028 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 93.8ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:52:34,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-02 14:52:34,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2021-05-02 14:52:34,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 36 states have internal predecessors, (38), 19 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 14:52:34,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2021-05-02 14:52:34,046 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 60 [2021-05-02 14:52:34,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:52:34,046 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2021-05-02 14:52:34,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 14:52:34,047 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2021-05-02 14:52:34,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-02 14:52:34,047 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:52:34,047 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:52:34,248 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 14:52:34,248 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:52:34,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:52:34,249 INFO L82 PathProgramCache]: Analyzing trace with hash -669670075, now seen corresponding path program 1 times [2021-05-02 14:52:34,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:52:34,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647341139] [2021-05-02 14:52:34,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:52:34,258 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:52:34,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [774863626] [2021-05-02 14:52:34,258 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 14:52:34,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:52:34,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 14:52:34,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:52:34,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:34,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:34,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:34,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:34,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:34,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:34,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:34,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:34,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:34,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:34,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:34,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:34,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:34,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:34,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:34,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:34,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:34,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:34,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:34,559 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 11 proven. 26 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-05-02 14:52:34,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:52:34,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647341139] [2021-05-02 14:52:34,559 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:52:34,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774863626] [2021-05-02 14:52:34,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774863626] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:52:34,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:52:34,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:52:34,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739940177] [2021-05-02 14:52:34,560 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:52:34,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:52:34,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:52:34,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:52:34,561 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 14:52:34,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:52:34,745 INFO L93 Difference]: Finished difference Result 80 states and 101 transitions. [2021-05-02 14:52:34,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:52:34,746 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 67 [2021-05-02 14:52:34,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:52:34,747 INFO L225 Difference]: With dead ends: 80 [2021-05-02 14:52:34,747 INFO L226 Difference]: Without dead ends: 78 [2021-05-02 14:52:34,747 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 103.5ms TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-05-02 14:52:34,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-02 14:52:34,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 71. [2021-05-02 14:52:34,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 41 states have internal predecessors, (44), 23 states have call successors, (23), 9 states have call predecessors, (23), 8 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 14:52:34,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2021-05-02 14:52:34,758 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 67 [2021-05-02 14:52:34,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:52:34,758 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2021-05-02 14:52:34,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 14:52:34,759 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2021-05-02 14:52:34,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 14:52:34,759 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:52:34,759 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:52:34,960 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:52:34,960 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:52:34,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:52:34,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1682830289, now seen corresponding path program 1 times [2021-05-02 14:52:34,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:52:34,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478431069] [2021-05-02 14:52:34,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:52:34,968 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:52:34,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [922613813] [2021-05-02 14:52:34,969 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 14:52:35,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:52:35,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 14:52:35,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:52:35,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,189 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 16 proven. 18 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 14:52:35,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:52:35,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478431069] [2021-05-02 14:52:35,189 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:52:35,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922613813] [2021-05-02 14:52:35,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922613813] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:52:35,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:52:35,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 14:52:35,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321457858] [2021-05-02 14:52:35,190 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:52:35,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:52:35,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:52:35,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:52:35,191 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-02 14:52:35,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:52:35,304 INFO L93 Difference]: Finished difference Result 89 states and 112 transitions. [2021-05-02 14:52:35,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 14:52:35,304 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 69 [2021-05-02 14:52:35,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:52:35,305 INFO L225 Difference]: With dead ends: 89 [2021-05-02 14:52:35,305 INFO L226 Difference]: Without dead ends: 72 [2021-05-02 14:52:35,306 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 49.1ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:52:35,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-05-02 14:52:35,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2021-05-02 14:52:35,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 41 states have internal predecessors, (43), 23 states have call successors, (23), 9 states have call predecessors, (23), 8 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 14:52:35,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 87 transitions. [2021-05-02 14:52:35,314 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 87 transitions. Word has length 69 [2021-05-02 14:52:35,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:52:35,314 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 87 transitions. [2021-05-02 14:52:35,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-02 14:52:35,314 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 87 transitions. [2021-05-02 14:52:35,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-02 14:52:35,315 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:52:35,315 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 3, 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, 1, 1, 1, 1] [2021-05-02 14:52:35,535 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:52:35,535 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:52:35,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:52:35,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1507900548, now seen corresponding path program 2 times [2021-05-02 14:52:35,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:52:35,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611451500] [2021-05-02 14:52:35,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:52:35,558 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:52:35,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1444331126] [2021-05-02 14:52:35,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:52:35,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:52:35,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:52:35,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 14:52:35,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:52:35,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:35,825 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 32 proven. 18 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-05-02 14:52:35,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:52:35,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611451500] [2021-05-02 14:52:35,825 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:52:35,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444331126] [2021-05-02 14:52:35,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444331126] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:52:35,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:52:35,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 14:52:35,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502121639] [2021-05-02 14:52:35,826 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:52:35,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:52:35,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:52:35,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:52:35,826 INFO L87 Difference]: Start difference. First operand 71 states and 87 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-02 14:52:35,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:52:35,933 INFO L93 Difference]: Finished difference Result 105 states and 128 transitions. [2021-05-02 14:52:35,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 14:52:35,933 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 89 [2021-05-02 14:52:35,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:52:35,934 INFO L225 Difference]: With dead ends: 105 [2021-05-02 14:52:35,934 INFO L226 Difference]: Without dead ends: 70 [2021-05-02 14:52:35,935 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 58.1ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:52:35,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-05-02 14:52:35,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2021-05-02 14:52:35,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 39 states have internal predecessors, (41), 22 states have call successors, (22), 9 states have call predecessors, (22), 8 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-02 14:52:35,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 83 transitions. [2021-05-02 14:52:35,951 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 83 transitions. Word has length 89 [2021-05-02 14:52:35,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:52:35,952 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 83 transitions. [2021-05-02 14:52:35,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-02 14:52:35,952 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 83 transitions. [2021-05-02 14:52:35,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-02 14:52:35,958 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:52:35,958 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:52:36,172 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 14:52:36,172 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:52:36,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:52:36,173 INFO L82 PathProgramCache]: Analyzing trace with hash -686534738, now seen corresponding path program 1 times [2021-05-02 14:52:36,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:52:36,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485963072] [2021-05-02 14:52:36,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:52:36,184 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:52:36,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1566363529] [2021-05-02 14:52:36,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 14:52:36,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:52:36,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-02 14:52:36,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:52:36,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:36,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:36,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:36,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:36,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:36,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:36,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:36,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:36,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:36,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:36,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:36,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:36,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:36,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:36,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:36,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:36,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:36,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:36,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:36,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:36,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:36,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:36,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:36,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:36,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:36,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:36,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:36,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:36,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:36,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:36,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:36,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:36,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:36,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:36,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:36,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:36,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:36,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:36,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:36,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:36,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:36,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:36,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:36,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:36,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:36,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:36,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:36,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:36,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:36,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:36,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:36,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:36,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:36,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:36,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:36,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:36,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:36,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:36,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:36,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:36,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:36,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:36,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:36,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:36,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:36,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:36,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:36,624 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-05-02 14:52:36,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:52:36,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485963072] [2021-05-02 14:52:36,625 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:52:36,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566363529] [2021-05-02 14:52:36,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566363529] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:52:36,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:52:36,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 14:52:36,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890602984] [2021-05-02 14:52:36,625 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 14:52:36,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:52:36,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 14:52:36,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-05-02 14:52:36,626 INFO L87 Difference]: Start difference. First operand 69 states and 83 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 8 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2021-05-02 14:52:36,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:52:36,933 INFO L93 Difference]: Finished difference Result 87 states and 107 transitions. [2021-05-02 14:52:36,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 14:52:36,933 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 8 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) Word has length 91 [2021-05-02 14:52:36,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:52:36,934 INFO L225 Difference]: With dead ends: 87 [2021-05-02 14:52:36,934 INFO L226 Difference]: Without dead ends: 85 [2021-05-02 14:52:36,935 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 242.6ms TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-05-02 14:52:36,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-05-02 14:52:36,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 77. [2021-05-02 14:52:36,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 46 states have internal predecessors, (48), 23 states have call successors, (23), 10 states have call predecessors, (23), 9 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 14:52:36,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 92 transitions. [2021-05-02 14:52:36,942 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 92 transitions. Word has length 91 [2021-05-02 14:52:36,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:52:36,942 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 92 transitions. [2021-05-02 14:52:36,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 8 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2021-05-02 14:52:36,942 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 92 transitions. [2021-05-02 14:52:36,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 14:52:36,943 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:52:36,943 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 3, 3, 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 14:52:37,159 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:52:37,160 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:52:37,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:52:37,160 INFO L82 PathProgramCache]: Analyzing trace with hash 197559527, now seen corresponding path program 1 times [2021-05-02 14:52:37,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:52:37,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703924793] [2021-05-02 14:52:37,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:52:37,168 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:52:37,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1087917618] [2021-05-02 14:52:37,168 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 14:52:37,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:52:37,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 14:52:37,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:52:37,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:37,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:37,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:37,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:37,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:37,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:37,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:37,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:37,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:37,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:37,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:37,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:37,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:37,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:37,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:37,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:37,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:37,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:37,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:37,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:37,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:37,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:37,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:37,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:37,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:37,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:37,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:37,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:37,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:37,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:37,558 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 20 proven. 23 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-05-02 14:52:37,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:52:37,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703924793] [2021-05-02 14:52:37,558 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:52:37,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087917618] [2021-05-02 14:52:37,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087917618] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:52:37,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:52:37,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:52:37,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370763716] [2021-05-02 14:52:37,559 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:52:37,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:52:37,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:52:37,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:52:37,559 INFO L87 Difference]: Start difference. First operand 77 states and 92 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-02 14:52:37,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:52:37,784 INFO L93 Difference]: Finished difference Result 84 states and 98 transitions. [2021-05-02 14:52:37,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:52:37,784 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 92 [2021-05-02 14:52:37,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:52:37,787 INFO L225 Difference]: With dead ends: 84 [2021-05-02 14:52:37,787 INFO L226 Difference]: Without dead ends: 65 [2021-05-02 14:52:37,788 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 131.4ms TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-05-02 14:52:37,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-02 14:52:37,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-05-02 14:52:37,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 38 states have (on average 1.0) internal successors, (38), 38 states have internal predecessors, (38), 18 states have call successors, (18), 10 states have call predecessors, (18), 8 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 14:52:37,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2021-05-02 14:52:37,812 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 92 [2021-05-02 14:52:37,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:52:37,813 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2021-05-02 14:52:37,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-02 14:52:37,813 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2021-05-02 14:52:37,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-05-02 14:52:37,815 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:52:37,815 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:52:38,015 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:52:38,015 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:52:38,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:52:38,016 INFO L82 PathProgramCache]: Analyzing trace with hash -2082914122, now seen corresponding path program 1 times [2021-05-02 14:52:38,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:52:38,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610152384] [2021-05-02 14:52:38,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:52:38,022 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:52:38,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [494046642] [2021-05-02 14:52:38,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 14:52:38,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:52:38,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 61 conjunts are in the unsatisfiable core [2021-05-02 14:52:38,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:52:38,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:38,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:38,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:38,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:38,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:38,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:38,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:38,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:38,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:38,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:38,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:38,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:38,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:38,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:38,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:38,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:38,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:38,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:38,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:38,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:38,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:38,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:38,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:38,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:38,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:38,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:38,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:38,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:38,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:38,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:38,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:38,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:38,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:38,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:38,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:38,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:38,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:38,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:38,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:38,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:38,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:38,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:38,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:38,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:38,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:38,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:38,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:38,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:38,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:38,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:52:38,649 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 46 proven. 49 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-05-02 14:52:38,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:52:38,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610152384] [2021-05-02 14:52:38,649 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:52:38,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494046642] [2021-05-02 14:52:38,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494046642] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:52:38,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:52:38,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-02 14:52:38,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365497256] [2021-05-02 14:52:38,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 14:52:38,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:52:38,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 14:52:38,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-05-02 14:52:38,650 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand has 19 states, 16 states have (on average 1.8125) internal successors, (29), 14 states have internal predecessors, (29), 10 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 10 states have call predecessors, (16), 10 states have call successors, (16) [2021-05-02 14:52:38,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:52:38,994 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2021-05-02 14:52:38,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 14:52:38,995 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 1.8125) internal successors, (29), 14 states have internal predecessors, (29), 10 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 10 states have call predecessors, (16), 10 states have call successors, (16) Word has length 96 [2021-05-02 14:52:38,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:52:38,996 INFO L225 Difference]: With dead ends: 65 [2021-05-02 14:52:38,996 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 14:52:38,999 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 450.6ms TimeCoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2021-05-02 14:52:38,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 14:52:39,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 14:52:39,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 14:52:39,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 14:52:39,000 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 96 [2021-05-02 14:52:39,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:52:39,000 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 14:52:39,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 16 states have (on average 1.8125) internal successors, (29), 14 states have internal predecessors, (29), 10 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 10 states have call predecessors, (16), 10 states have call successors, (16) [2021-05-02 14:52:39,000 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 14:52:39,000 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 14:52:39,219 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 14:52:39,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 14:52:39,647 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 36 [2021-05-02 14:52:39,834 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 34 [2021-05-02 14:52:40,139 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 36 [2021-05-02 14:52:40,369 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 34 [2021-05-02 14:52:40,610 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 41 [2021-05-02 14:52:40,770 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 44 [2021-05-02 14:52:40,781 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2021-05-02 14:52:40,782 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 4) no Hoare annotation was computed. [2021-05-02 14:52:40,782 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2021-05-02 14:52:40,782 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 14:52:40,782 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-02 14:52:40,782 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 14:52:40,782 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 14:52:40,782 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-02 14:52:40,782 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 14:52:40,782 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 14:52:40,782 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 7 9) the Hoare annotation is: true [2021-05-02 14:52:40,782 INFO L198 CegarLoopUtils]: For program point L8(line 8) no Hoare annotation was computed. [2021-05-02 14:52:40,782 INFO L198 CegarLoopUtils]: For program point L8-2(lines 7 9) no Hoare annotation was computed. [2021-05-02 14:52:40,782 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 7 9) no Hoare annotation was computed. [2021-05-02 14:52:40,782 INFO L194 CegarLoopUtils]: At program point L25(line 25) the Hoare annotation is: (and (<= 1 main_~x~0) (<= 0 main_~y~0) (<= main_~x~0 1) (<= main_~y~0 1)) [2021-05-02 14:52:40,782 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 18 74) no Hoare annotation was computed. [2021-05-02 14:52:40,783 INFO L194 CegarLoopUtils]: At program point L50(line 50) the Hoare annotation is: (let ((.cse0 (= (* main_~y~0 main_~y~0) main_~yy~0)) (.cse1 (= main_~r~0 0)) (.cse2 (<= main_~x~0 1)) (.cse3 (= main_~p~0 1)) (.cse4 (= main_~s~0 1)) (.cse5 (<= main_~y~0 1))) (or (and .cse0 (= main_~a~0 main_~x~0) (<= 0 main_~c~0) (<= 1 main_~b~0) .cse1 (= main_~b~0 (+ (* main_~y~0 main_~s~0) (* main_~x~0 main_~q~0))) (= main_~k~0 1) (= main_~x~0 (+ main_~b~0 main_~c~0)) .cse2 (<= main_~b~0 main_~y~0) .cse3 .cse4 .cse5) (and .cse0 (= main_~q~0 0) (= main_~k~0 0) (<= main_~c~0 main_~x~0) .cse1 (= main_~b~0 main_~y~0) (<= 1 main_~y~0) (= main_~c~0 main_~a~0) (<= 1 main_~a~0) .cse2 .cse3 .cse4 .cse5))) [2021-05-02 14:52:40,785 INFO L194 CegarLoopUtils]: At program point L48(line 48) the Hoare annotation is: (let ((.cse0 (= (* main_~y~0 main_~y~0) main_~yy~0)) (.cse1 (= main_~q~0 0)) (.cse2 (<= 1 main_~b~0)) (.cse3 (= main_~r~0 0)) (.cse4 (<= main_~x~0 1)) (.cse5 (= main_~p~0 1)) (.cse6 (<= main_~b~0 main_~y~0)) (.cse7 (= main_~s~0 1)) (.cse8 (<= main_~y~0 1))) (or (and .cse0 .cse1 (<= 0 main_~c~0) (<= main_~a~0 main_~x~0) .cse2 (<= main_~b~0 main_~a~0) .cse3 (= main_~k~0 1) (<= (+ main_~b~0 main_~c~0) 1) .cse4 .cse5 .cse6 .cse7 .cse8) (and .cse0 .cse1 (<= 1 main_~x~0) (= main_~a~0 main_~x~0) (= main_~k~0 0) .cse2 .cse3 (= main_~c~0 main_~a~0) .cse4 .cse5 .cse6 .cse7 .cse8))) [2021-05-02 14:52:40,785 INFO L194 CegarLoopUtils]: At program point L48-1(line 48) the Hoare annotation is: (let ((.cse0 (= (* main_~y~0 main_~y~0) main_~yy~0)) (.cse1 (= main_~q~0 0)) (.cse2 (= main_~r~0 0)) (.cse3 (= main_~b~0 main_~y~0)) (.cse4 (<= 1 main_~y~0)) (.cse5 (<= 1 main_~a~0)) (.cse6 (<= main_~x~0 1)) (.cse7 (= main_~p~0 1)) (.cse8 (= main_~s~0 1)) (.cse9 (<= main_~y~0 1))) (or (and .cse0 .cse1 (= main_~k~0 0) (<= main_~c~0 main_~x~0) .cse2 .cse3 .cse4 (= main_~c~0 main_~a~0) .cse5 .cse6 .cse7 .cse8 .cse9) (and .cse0 .cse1 (<= main_~a~0 main_~x~0) .cse2 .cse3 (= main_~k~0 1) .cse4 (= main_~a~0 (+ main_~b~0 main_~c~0)) .cse5 .cse6 .cse7 .cse8 .cse9))) [2021-05-02 14:52:40,785 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 18 74) no Hoare annotation was computed. [2021-05-02 14:52:40,785 INFO L198 CegarLoopUtils]: For program point L42(lines 42 43) no Hoare annotation was computed. [2021-05-02 14:52:40,785 INFO L194 CegarLoopUtils]: At program point L71(line 71) the Hoare annotation is: (and (< (* 2 main_~c~0) 1) (< main_~x~0 (* 2 main_~a~0)) (= main_~p~0 0) (= main_~r~0 1) (<= 0 main_~c~0) (<= 1 main_~y~0) (<= 0 main_~b~0) (= (+ main_~a~0 main_~b~0) main_~x~0) (<= main_~x~0 1) (<= main_~y~0 1)) [2021-05-02 14:52:40,785 INFO L194 CegarLoopUtils]: At program point L38(line 38) the Hoare annotation is: (and (= (* main_~y~0 main_~y~0) main_~yy~0) (= main_~q~0 0) (<= 1 main_~x~0) (= main_~a~0 main_~x~0) (= main_~k~0 0) (<= 0 main_~c~0) (<= 1 main_~b~0) (< (* 2 main_~c~0) 1) (= main_~r~0 0) (<= main_~x~0 1) (= main_~p~0 1) (<= main_~b~0 main_~y~0) (= main_~s~0 1) (<= main_~y~0 1)) [2021-05-02 14:52:40,785 INFO L194 CegarLoopUtils]: At program point L38-1(line 38) the Hoare annotation is: (and (= (* main_~y~0 main_~y~0) main_~yy~0) (= main_~q~0 0) (<= 1 main_~x~0) (= main_~a~0 main_~x~0) (= main_~k~0 0) (<= 0 main_~c~0) (<= 1 main_~b~0) (< (* 2 main_~c~0) 1) (= main_~r~0 0) (<= main_~x~0 1) (= main_~p~0 1) (<= main_~b~0 main_~y~0) (= main_~s~0 1) (<= main_~y~0 1)) [2021-05-02 14:52:40,786 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 18 74) the Hoare annotation is: true [2021-05-02 14:52:40,786 INFO L198 CegarLoopUtils]: For program point L26(line 26) no Hoare annotation was computed. [2021-05-02 14:52:40,786 INFO L194 CegarLoopUtils]: At program point L24(line 24) the Hoare annotation is: (and (<= 0 main_~x~0) (<= main_~x~0 1)) [2021-05-02 14:52:40,786 INFO L194 CegarLoopUtils]: At program point L24-1(line 24) the Hoare annotation is: (and (<= 0 main_~x~0) (<= 0 main_~y~0) (<= main_~x~0 1) (<= main_~y~0 1)) [2021-05-02 14:52:40,786 INFO L201 CegarLoopUtils]: At program point L22(line 22) the Hoare annotation is: true [2021-05-02 14:52:40,787 INFO L198 CegarLoopUtils]: For program point L22-1(line 22) no Hoare annotation was computed. [2021-05-02 14:52:40,787 INFO L198 CegarLoopUtils]: For program point L51(lines 47 56) no Hoare annotation was computed. [2021-05-02 14:52:40,787 INFO L194 CegarLoopUtils]: At program point L49(line 49) the Hoare annotation is: (let ((.cse0 (= (* main_~y~0 main_~y~0) main_~yy~0)) (.cse1 (= main_~q~0 0)) (.cse2 (= main_~r~0 0)) (.cse3 (= main_~b~0 main_~y~0)) (.cse4 (<= 1 main_~y~0)) (.cse5 (<= 1 main_~a~0)) (.cse6 (<= main_~x~0 1)) (.cse7 (= main_~p~0 1)) (.cse8 (= main_~s~0 1)) (.cse9 (<= main_~y~0 1))) (or (and .cse0 .cse1 (= main_~k~0 0) (<= main_~c~0 main_~x~0) .cse2 .cse3 .cse4 (= main_~c~0 main_~a~0) .cse5 .cse6 .cse7 .cse8 .cse9) (let ((.cse10 (+ main_~b~0 main_~c~0))) (and .cse0 .cse1 .cse2 .cse3 (= main_~x~0 .cse10) (= main_~k~0 1) .cse4 (= main_~a~0 .cse10) .cse5 .cse6 .cse7 .cse8 .cse9)))) [2021-05-02 14:52:40,787 INFO L194 CegarLoopUtils]: At program point L47-2(lines 47 56) the Hoare annotation is: (let ((.cse0 (= (* main_~y~0 main_~y~0) main_~yy~0)) (.cse1 (= main_~q~0 0)) (.cse2 (<= 1 main_~b~0)) (.cse3 (= main_~r~0 0)) (.cse4 (<= main_~x~0 1)) (.cse5 (= main_~p~0 1)) (.cse6 (<= main_~b~0 main_~y~0)) (.cse7 (= main_~s~0 1)) (.cse8 (<= main_~y~0 1))) (or (and .cse0 .cse1 (<= 0 main_~c~0) (<= main_~a~0 main_~x~0) .cse2 (<= main_~b~0 main_~a~0) .cse3 (= main_~k~0 1) (<= (+ main_~b~0 main_~c~0) 1) .cse4 .cse5 .cse6 .cse7 .cse8) (and .cse0 .cse1 (<= 1 main_~x~0) (= main_~a~0 main_~x~0) (= main_~k~0 0) .cse2 .cse3 (= main_~c~0 main_~a~0) .cse4 .cse5 .cse6 .cse7 .cse8))) [2021-05-02 14:52:40,787 INFO L198 CegarLoopUtils]: For program point L47-3(lines 47 56) no Hoare annotation was computed. [2021-05-02 14:52:40,787 INFO L194 CegarLoopUtils]: At program point L41-1(lines 39 68) the Hoare annotation is: (let ((.cse1 (< (* 2 main_~c~0) 1)) (.cse0 (<= 0 main_~c~0)) (.cse2 (<= main_~x~0 1)) (.cse3 (<= main_~y~0 1))) (or (and (= (* main_~y~0 main_~y~0) main_~yy~0) (= main_~q~0 0) (<= 1 main_~x~0) (= main_~a~0 main_~x~0) (= main_~k~0 0) .cse0 (<= 1 main_~b~0) .cse1 (= main_~r~0 0) .cse2 (= main_~p~0 1) (<= main_~b~0 main_~y~0) (= main_~s~0 1) .cse3) (and .cse1 (< main_~x~0 (* 2 main_~a~0)) (= main_~p~0 0) (= main_~r~0 1) .cse0 (<= 0 main_~b~0) (= (+ main_~a~0 main_~b~0) main_~x~0) (< 0 main_~y~0) (= main_~q~0 1) .cse2 (= (+ main_~s~0 1) 0) .cse3))) [2021-05-02 14:52:40,787 INFO L198 CegarLoopUtils]: For program point L72(line 72) no Hoare annotation was computed. [2021-05-02 14:52:40,787 INFO L194 CegarLoopUtils]: At program point L41-2(lines 41 68) the Hoare annotation is: (and (< (* 2 main_~c~0) 1) (< main_~x~0 (* 2 main_~a~0)) (= main_~p~0 0) (= main_~r~0 1) (<= 0 main_~c~0) (<= 0 main_~b~0) (= (+ main_~a~0 main_~b~0) main_~x~0) (< 0 main_~y~0) (= main_~q~0 1) (<= main_~x~0 1) (= (+ main_~s~0 1) 0) (<= main_~y~0 1)) [2021-05-02 14:52:40,787 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 10 16) the Hoare annotation is: true [2021-05-02 14:52:40,787 INFO L198 CegarLoopUtils]: For program point L12(lines 12 13) no Hoare annotation was computed. [2021-05-02 14:52:40,795 INFO L198 CegarLoopUtils]: For program point L11(lines 11 14) no Hoare annotation was computed. [2021-05-02 14:52:40,795 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 10 16) no Hoare annotation was computed. [2021-05-02 14:52:40,795 INFO L198 CegarLoopUtils]: For program point L11-2(lines 10 16) no Hoare annotation was computed. [2021-05-02 14:52:40,796 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2021-05-02 14:52:40,824 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 02:52:40 BoogieIcfgContainer [2021-05-02 14:52:40,824 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 14:52:40,824 INFO L168 Benchmark]: Toolchain (without parser) took 10885.35 ms. Allocated memory was 173.0 MB in the beginning and 314.6 MB in the end (delta: 141.6 MB). Free memory was 136.8 MB in the beginning and 252.2 MB in the end (delta: -115.4 MB). Peak memory consumption was 167.3 MB. Max. memory is 8.0 GB. [2021-05-02 14:52:40,824 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 173.0 MB. Free memory was 153.2 MB in the beginning and 153.1 MB in the end (delta: 106.9 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 14:52:40,824 INFO L168 Benchmark]: CACSL2BoogieTranslator took 228.28 ms. Allocated memory is still 173.0 MB. Free memory was 136.6 MB in the beginning and 155.1 MB in the end (delta: -18.5 MB). Peak memory consumption was 11.6 MB. Max. memory is 8.0 GB. [2021-05-02 14:52:40,824 INFO L168 Benchmark]: Boogie Preprocessor took 37.87 ms. Allocated memory is still 173.0 MB. Free memory was 155.1 MB in the beginning and 153.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 14:52:40,825 INFO L168 Benchmark]: RCFGBuilder took 233.89 ms. Allocated memory is still 173.0 MB. Free memory was 153.6 MB in the beginning and 135.7 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-05-02 14:52:40,825 INFO L168 Benchmark]: TraceAbstraction took 10381.58 ms. Allocated memory was 173.0 MB in the beginning and 314.6 MB in the end (delta: 141.6 MB). Free memory was 135.2 MB in the beginning and 252.2 MB in the end (delta: -117.0 MB). Peak memory consumption was 166.1 MB. Max. memory is 8.0 GB. [2021-05-02 14:52:40,825 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 173.0 MB. Free memory was 153.2 MB in the beginning and 153.1 MB in the end (delta: 106.9 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 228.28 ms. Allocated memory is still 173.0 MB. Free memory was 136.6 MB in the beginning and 155.1 MB in the end (delta: -18.5 MB). Peak memory consumption was 11.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 37.87 ms. Allocated memory is still 173.0 MB. Free memory was 155.1 MB in the beginning and 153.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 233.89 ms. Allocated memory is still 173.0 MB. Free memory was 153.6 MB in the beginning and 135.7 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 10381.58 ms. Allocated memory was 173.0 MB in the beginning and 314.6 MB in the end (delta: 141.6 MB). Free memory was 135.2 MB in the beginning and 252.2 MB in the end (delta: -117.0 MB). Peak memory consumption was 166.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 8743.0ms, OverallIterations: 12, TraceHistogramMax: 10, EmptinessCheckTime: 22.8ms, AutomataDifference: 2138.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 1561.9ms, InitialAbstractionConstructionTime: 8.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 492 SDtfs, 417 SDslu, 2249 SDs, 0 SdLazy, 1663 SolverSat, 415 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1042.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 810 GetRequests, 669 SyntacticMatches, 1 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 1439.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=77occurred in iteration=10, InterpolantAutomatonStates: 121, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 152.5ms AutomataMinimizationTime, 12 MinimizatonAttempts, 41 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 20 LocationsWithAnnotation, 69 PreInvPairs, 88 NumberOfFragments, 788 HoareAnnotationTreeSize, 69 FomulaSimplifications, 2627 FormulaSimplificationTreeSizeReduction, 185.6ms HoareSimplificationTime, 20 FomulaSimplificationsInter, 1454 FormulaSimplificationTreeSizeReductionInter, 1358.5ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 142.1ms SsaConstructionTime, 374.2ms SatisfiabilityAnalysisTime, 2995.7ms InterpolantComputationTime, 801 NumberOfCodeBlocks, 801 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 789 ConstructedInterpolants, 0 QuantifiedInterpolants, 3659 SizeOfPredicates, 67 NumberOfNonLiveVariables, 2412 ConjunctsInSsa, 308 ConjunctsInUnsatCore, 12 InterpolantComputations, 1 PerfectInterpolantSequences, 1134/1400 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 47]: Loop Invariant Derived loop invariant: (((((((((((((y * y == yy && q == 0) && 0 <= c) && a <= x) && 1 <= b) && b <= a) && r == 0) && k == 1) && b + c <= 1) && x <= 1) && p == 1) && b <= y) && s == 1) && y <= 1) || ((((((((((((y * y == yy && q == 0) && 1 <= x) && a == x) && k == 0) && 1 <= b) && r == 0) && c == a) && x <= 1) && p == 1) && b <= y) && s == 1) && y <= 1) - InvariantResult [Line: 39]: Loop Invariant Derived loop invariant: (((((((((((((y * y == yy && q == 0) && 1 <= x) && a == x) && k == 0) && 0 <= c) && 1 <= b) && 2 * c < 1) && r == 0) && x <= 1) && p == 1) && b <= y) && s == 1) && y <= 1) || (((((((((((2 * c < 1 && x < 2 * a) && p == 0) && r == 1) && 0 <= c) && 0 <= b) && a + b == x) && 0 < y) && q == 1) && x <= 1) && s + 1 == 0) && y <= 1) RESULT: Ultimate proved your program to be correct! Received shutdown request...