/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_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 14:55:34,798 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 14:55:34,801 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 14:55:34,844 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 14:55:34,867 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 14:55:34,869 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 14:55:34,870 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 14:55:34,872 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 14:55:34,875 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 14:55:34,875 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 14:55:34,878 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 14:55:34,884 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 14:55:34,885 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 14:55:34,887 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 14:55:34,890 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 14:55:34,892 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 14:55:34,899 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 14:55:34,909 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 14:55:34,910 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 14:55:34,910 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 14:55:34,911 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 14:55:34,950 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 14:55:34,950 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 14:55:34,954 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 14:55:34,954 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 14:55:34,954 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 14:55:34,955 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 14:55:34,955 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 14:55:34,955 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 14:55:34,955 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 14:55:34,956 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 14:55:34,956 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 14:55:34,957 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 14:55:34,957 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 14:55:34,957 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 14:55:34,957 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 14:55:34,957 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 14:55:34,957 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 14:55:34,958 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 14:55:34,958 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 14:55:34,958 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 14:55:34,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 14:55:34,959 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 14:55:34,959 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 14:55:34,959 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 14:55:34,959 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 14:55:34,959 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 14:55:34,959 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 14:55:34,960 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 14:55:34,960 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 14:55:35,327 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 14:55:35,354 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 14:55:35,357 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 14:55:35,358 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 14:55:35,359 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 14:55:35,360 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound20.c [2021-05-02 14:55:35,419 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f511f8aa4/3e0bb62a989d42faae6ef70a80bce7e9/FLAGf1abcbd16 [2021-05-02 14:55:36,202 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 14:55:36,202 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound20.c [2021-05-02 14:55:36,207 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f511f8aa4/3e0bb62a989d42faae6ef70a80bce7e9/FLAGf1abcbd16 [2021-05-02 14:55:36,251 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f511f8aa4/3e0bb62a989d42faae6ef70a80bce7e9 [2021-05-02 14:55:36,254 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 14:55:36,256 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 14:55:36,260 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 14:55:36,260 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 14:55:36,264 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 14:55:36,264 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:55:36" (1/1) ... [2021-05-02 14:55:36,265 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ad7876b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:55:36, skipping insertion in model container [2021-05-02 14:55:36,265 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:55:36" (1/1) ... [2021-05-02 14:55:36,272 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 14:55:36,289 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 14:55:36,438 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_valuebound20.c[490,503] [2021-05-02 14:55:36,469 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:55:36,480 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 14:55:36,493 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_valuebound20.c[490,503] [2021-05-02 14:55:36,518 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:55:36,555 INFO L208 MainTranslator]: Completed translation [2021-05-02 14:55:36,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:55:36 WrapperNode [2021-05-02 14:55:36,555 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 14:55:36,556 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 14:55:36,556 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 14:55:36,556 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 14:55:36,594 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:55:36" (1/1) ... [2021-05-02 14:55:36,595 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:55:36" (1/1) ... [2021-05-02 14:55:36,609 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:55:36" (1/1) ... [2021-05-02 14:55:36,609 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:55:36" (1/1) ... [2021-05-02 14:55:36,621 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:55:36" (1/1) ... [2021-05-02 14:55:36,624 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:55:36" (1/1) ... [2021-05-02 14:55:36,625 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:55:36" (1/1) ... [2021-05-02 14:55:36,627 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 14:55:36,628 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 14:55:36,628 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 14:55:36,628 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 14:55:36,629 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:55:36" (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 14:55:36,705 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 14:55:36,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 14:55:36,706 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 14:55:36,706 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 14:55:36,706 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 14:55:36,707 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 14:55:36,707 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 14:55:36,707 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 14:55:36,708 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 14:55:36,708 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 14:55:36,708 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 14:55:36,708 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 14:55:36,709 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 14:55:36,709 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 14:55:36,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 14:55:36,711 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 14:55:36,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 14:55:36,711 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 14:55:36,711 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 14:55:36,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 14:55:37,045 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 14:55:37,046 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 14:55:37,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:55:37 BoogieIcfgContainer [2021-05-02 14:55:37,047 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 14:55:37,049 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 14:55:37,049 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 14:55:37,054 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 14:55:37,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 02:55:36" (1/3) ... [2021-05-02 14:55:37,055 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35adae37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:55:37, skipping insertion in model container [2021-05-02 14:55:37,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:55:36" (2/3) ... [2021-05-02 14:55:37,055 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35adae37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:55:37, skipping insertion in model container [2021-05-02 14:55:37,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:55:37" (3/3) ... [2021-05-02 14:55:37,056 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound20.c [2021-05-02 14:55:37,061 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 14:55:37,065 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 14:55:37,084 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 14:55:37,117 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 14:55:37,118 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 14:55:37,118 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 14:55:37,119 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 14:55:37,119 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 14:55:37,119 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 14:55:37,119 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 14:55:37,119 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 14:55:37,138 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 14:55:37,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 14:55:37,144 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:55:37,145 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 14:55:37,145 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:55:37,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:55:37,151 INFO L82 PathProgramCache]: Analyzing trace with hash -587582002, now seen corresponding path program 1 times [2021-05-02 14:55:37,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:55:37,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456212568] [2021-05-02 14:55:37,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:55:37,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:55:37,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 14:55:37,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:55:37,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 14:55:37,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:55:37,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 14:55:37,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:55:37,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 14:55:37,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:55:37,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 14:55:37,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:55:37,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-05-02 14:55:37,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:55:37,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-05-02 14:55:37,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:55:37,480 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 14:55:37,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:55:37,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456212568] [2021-05-02 14:55:37,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456212568] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:55:37,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:55:37,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 14:55:37,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139012351] [2021-05-02 14:55:37,488 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 14:55:37,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:55:37,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 14:55:37,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:55:37,501 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 14:55:37,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:55:37,723 INFO L93 Difference]: Finished difference Result 73 states and 118 transitions. [2021-05-02 14:55:37,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 14:55:37,726 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 14:55:37,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:55:37,734 INFO L225 Difference]: With dead ends: 73 [2021-05-02 14:55:37,734 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 14:55:37,739 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 58.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:55:37,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 14:55:37,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 14:55:37,787 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 14:55:37,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2021-05-02 14:55:37,790 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 43 [2021-05-02 14:55:37,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:55:37,790 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2021-05-02 14:55:37,790 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 14:55:37,790 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2021-05-02 14:55:37,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 14:55:37,792 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:55:37,792 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 14:55:37,792 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 14:55:37,792 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:55:37,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:55:37,793 INFO L82 PathProgramCache]: Analyzing trace with hash 987777007, now seen corresponding path program 1 times [2021-05-02 14:55:37,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:55:37,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281900499] [2021-05-02 14:55:37,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:55:37,809 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:55:37,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [716829352] [2021-05-02 14:55:37,810 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 14:55:37,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:55:37,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 14:55:37,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:55:37,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:37,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:37,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:38,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:38,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:38,023 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 14:55:38,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:55:38,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281900499] [2021-05-02 14:55:38,023 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:55:38,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716829352] [2021-05-02 14:55:38,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716829352] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:55:38,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:55:38,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 14:55:38,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892158833] [2021-05-02 14:55:38,025 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 14:55:38,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:55:38,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 14:55:38,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:55:38,026 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 14:55:38,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:55:38,122 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2021-05-02 14:55:38,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 14:55:38,122 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 14:55:38,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:55:38,124 INFO L225 Difference]: With dead ends: 52 [2021-05-02 14:55:38,124 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 14:55:38,124 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 28.7ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:55:38,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 14:55:38,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-05-02 14:55:38,134 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 14:55:38,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2021-05-02 14:55:38,136 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 44 [2021-05-02 14:55:38,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:55:38,136 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2021-05-02 14:55:38,136 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 14:55:38,136 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2021-05-02 14:55:38,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 14:55:38,137 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:55:38,138 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 14:55:38,365 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 14:55:38,365 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:55:38,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:55:38,366 INFO L82 PathProgramCache]: Analyzing trace with hash 561616070, now seen corresponding path program 1 times [2021-05-02 14:55:38,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:55:38,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864100457] [2021-05-02 14:55:38,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:55:38,398 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:55:38,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [131415046] [2021-05-02 14:55:38,398 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 14:55:38,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:55:38,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 14:55:38,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:55:38,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:38,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:38,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:38,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:38,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:38,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:38,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:38,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:38,643 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 14:55:38,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:55:38,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864100457] [2021-05-02 14:55:38,643 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:55:38,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131415046] [2021-05-02 14:55:38,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131415046] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:55:38,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:55:38,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 14:55:38,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403614186] [2021-05-02 14:55:38,644 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:55:38,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:55:38,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:55:38,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:55:38,645 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 14:55:38,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:55:38,831 INFO L93 Difference]: Finished difference Result 57 states and 77 transitions. [2021-05-02 14:55:38,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:55:38,831 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 14:55:38,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:55:38,834 INFO L225 Difference]: With dead ends: 57 [2021-05-02 14:55:38,834 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 14:55:38,836 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 65.8ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:55:38,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 14:55:38,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2021-05-02 14:55:38,855 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 14:55:38,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2021-05-02 14:55:38,856 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 45 [2021-05-02 14:55:38,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:55:38,857 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2021-05-02 14:55:38,857 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 14:55:38,857 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2021-05-02 14:55:38,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 14:55:38,858 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:55:38,858 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 14:55:39,079 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:55:39,079 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:55:39,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:55:39,080 INFO L82 PathProgramCache]: Analyzing trace with hash -680064098, now seen corresponding path program 1 times [2021-05-02 14:55:39,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:55:39,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033532112] [2021-05-02 14:55:39,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:55:39,100 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:55:39,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1381683939] [2021-05-02 14:55:39,101 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 14:55:39,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:55:39,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 14:55:39,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:55:39,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:39,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:39,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:39,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:39,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:39,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:39,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:39,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:39,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:39,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:39,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:39,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:39,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:39,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:39,466 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-02 14:55:39,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:55:39,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033532112] [2021-05-02 14:55:39,466 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:55:39,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381683939] [2021-05-02 14:55:39,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381683939] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:55:39,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:55:39,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 14:55:39,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107666477] [2021-05-02 14:55:39,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:55:39,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:55:39,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:55:39,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:55:39,469 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 14:55:39,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:55:39,608 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2021-05-02 14:55:39,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:55:39,609 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 50 [2021-05-02 14:55:39,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:55:39,614 INFO L225 Difference]: With dead ends: 56 [2021-05-02 14:55:39,614 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 14:55:39,620 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 69.6ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:55:39,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 14:55:39,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-05-02 14:55:39,634 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 14:55:39,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2021-05-02 14:55:39,642 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 50 [2021-05-02 14:55:39,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:55:39,642 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2021-05-02 14:55:39,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 14:55:39,643 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2021-05-02 14:55:39,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 14:55:39,649 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:55:39,650 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 14:55:39,864 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:55:39,865 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:55:39,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:55:39,865 INFO L82 PathProgramCache]: Analyzing trace with hash 606548870, now seen corresponding path program 1 times [2021-05-02 14:55:39,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:55:39,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659505835] [2021-05-02 14:55:39,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:55:39,881 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:55:39,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [318910236] [2021-05-02 14:55:39,882 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 14:55:39,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:55:39,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 14:55:39,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:55:40,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:40,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:40,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:40,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:40,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:40,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:40,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:40,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:40,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:40,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:40,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:40,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:40,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:40,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:40,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:40,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:40,215 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 14:55:40,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:55:40,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659505835] [2021-05-02 14:55:40,216 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:55:40,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318910236] [2021-05-02 14:55:40,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318910236] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:55:40,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:55:40,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 14:55:40,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109995105] [2021-05-02 14:55:40,217 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:55:40,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:55:40,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:55:40,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:55:40,218 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 14:55:40,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:55:40,370 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2021-05-02 14:55:40,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:55:40,371 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 55 [2021-05-02 14:55:40,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:55:40,372 INFO L225 Difference]: With dead ends: 60 [2021-05-02 14:55:40,372 INFO L226 Difference]: Without dead ends: 58 [2021-05-02 14:55:40,373 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 57.4ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:55:40,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-02 14:55:40,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2021-05-02 14:55:40,395 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 14:55:40,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2021-05-02 14:55:40,398 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 55 [2021-05-02 14:55:40,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:55:40,398 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2021-05-02 14:55:40,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 14:55:40,398 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2021-05-02 14:55:40,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-02 14:55:40,403 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:55:40,404 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 14:55:40,624 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:55:40,625 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:55:40,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:55:40,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1584976990, now seen corresponding path program 1 times [2021-05-02 14:55:40,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:55:40,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286040442] [2021-05-02 14:55:40,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:55:40,640 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:55:40,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1107209089] [2021-05-02 14:55:40,641 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 14:55:40,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:55:40,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 14:55:40,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:55:40,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:40,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:40,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:40,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:40,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:40,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:40,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:40,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:40,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:40,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:40,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:40,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:40,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:40,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:40,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:40,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:40,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:40,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:40,964 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-05-02 14:55:40,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:55:40,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286040442] [2021-05-02 14:55:40,965 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:55:40,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107209089] [2021-05-02 14:55:40,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107209089] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:55:40,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:55:40,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:55:40,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333724285] [2021-05-02 14:55:40,965 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:55:40,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:55:40,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:55:40,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:55:40,966 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-02 14:55:43,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:55:43,217 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2021-05-02 14:55:43,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:55:43,217 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 60 [2021-05-02 14:55:43,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:55:43,218 INFO L225 Difference]: With dead ends: 64 [2021-05-02 14:55:43,218 INFO L226 Difference]: Without dead ends: 62 [2021-05-02 14:55:43,219 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 82.6ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:55:43,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-05-02 14:55:43,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-05-02 14:55:43,227 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 14:55:43,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2021-05-02 14:55:43,227 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 60 [2021-05-02 14:55:43,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:55:43,228 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2021-05-02 14:55:43,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-02 14:55:43,228 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2021-05-02 14:55:43,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-02 14:55:43,228 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:55:43,229 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 14:55:43,452 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 14:55:43,452 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:55:43,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:55:43,453 INFO L82 PathProgramCache]: Analyzing trace with hash -669670075, now seen corresponding path program 1 times [2021-05-02 14:55:43,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:55:43,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829487964] [2021-05-02 14:55:43,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:55:43,464 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:55:43,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [383983810] [2021-05-02 14:55:43,464 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 14:55:43,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:55:43,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 14:55:43,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:55:43,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:43,682 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-05-02 14:55:43,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:55:43,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829487964] [2021-05-02 14:55:43,682 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:55:43,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383983810] [2021-05-02 14:55:43,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383983810] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:55:43,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:55:43,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 14:55:43,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290233644] [2021-05-02 14:55:43,684 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:55:43,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:55:43,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:55:43,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:55:43,684 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-05-02 14:55:43,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:55:43,867 INFO L93 Difference]: Finished difference Result 91 states and 122 transitions. [2021-05-02 14:55:43,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 14:55:43,868 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 67 [2021-05-02 14:55:43,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:55:43,870 INFO L225 Difference]: With dead ends: 91 [2021-05-02 14:55:43,870 INFO L226 Difference]: Without dead ends: 89 [2021-05-02 14:55:43,872 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 44.4ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:55:43,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-02 14:55:43,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 79. [2021-05-02 14:55:43,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 45 states have internal predecessors, (48), 28 states have call successors, (28), 9 states have call predecessors, (28), 8 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-02 14:55:43,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2021-05-02 14:55:43,897 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 67 [2021-05-02 14:55:43,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:55:43,899 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2021-05-02 14:55:43,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-05-02 14:55:43,899 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2021-05-02 14:55:43,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 14:55:43,900 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:55:43,901 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 14:55:44,120 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:55:44,121 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:55:44,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:55:44,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1682830289, now seen corresponding path program 1 times [2021-05-02 14:55:44,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:55:44,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949939079] [2021-05-02 14:55:44,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:55:44,131 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:55:44,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1867163575] [2021-05-02 14:55:44,131 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 14:55:44,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:55:44,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 14:55:44,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:55:44,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:44,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:44,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:44,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:44,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:44,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:44,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:44,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:44,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:44,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:44,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:44,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:44,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:44,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:44,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:44,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:44,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:44,351 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-05-02 14:55:44,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:55:44,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949939079] [2021-05-02 14:55:44,351 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:55:44,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867163575] [2021-05-02 14:55:44,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867163575] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:55:44,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:55:44,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 14:55:44,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373713736] [2021-05-02 14:55:44,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:55:44,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:55:44,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:55:44,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:55:44,353 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 14:55:44,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:55:44,526 INFO L93 Difference]: Finished difference Result 124 states and 172 transitions. [2021-05-02 14:55:44,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:55:44,527 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2021-05-02 14:55:44,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:55:44,528 INFO L225 Difference]: With dead ends: 124 [2021-05-02 14:55:44,528 INFO L226 Difference]: Without dead ends: 116 [2021-05-02 14:55:44,529 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 65.8ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:55:44,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-02 14:55:44,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 105. [2021-05-02 14:55:44,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 55 states have (on average 1.1818181818181819) internal successors, (65), 59 states have internal predecessors, (65), 41 states have call successors, (41), 9 states have call predecessors, (41), 8 states have return successors, (39), 36 states have call predecessors, (39), 39 states have call successors, (39) [2021-05-02 14:55:44,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 145 transitions. [2021-05-02 14:55:44,547 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 145 transitions. Word has length 69 [2021-05-02 14:55:44,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:55:44,547 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 145 transitions. [2021-05-02 14:55:44,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 14:55:44,547 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 145 transitions. [2021-05-02 14:55:44,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 14:55:44,548 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:55:44,548 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 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] [2021-05-02 14:55:44,764 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:55:44,765 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:55:44,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:55:44,765 INFO L82 PathProgramCache]: Analyzing trace with hash 376741854, now seen corresponding path program 1 times [2021-05-02 14:55:44,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:55:44,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527698463] [2021-05-02 14:55:44,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:55:44,775 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:55:44,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2040952859] [2021-05-02 14:55:44,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:55:44,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:55:44,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 14:55:44,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:55:44,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:44,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:44,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:44,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:44,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:44,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:44,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:44,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:44,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:44,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:44,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:44,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:44,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:44,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:44,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:44,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:45,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:45,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:45,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:45,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:45,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:45,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:45,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:45,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:45,085 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-05-02 14:55:45,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:55:45,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527698463] [2021-05-02 14:55:45,086 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:55:45,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040952859] [2021-05-02 14:55:45,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040952859] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:55:45,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:55:45,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 14:55:45,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955141795] [2021-05-02 14:55:45,086 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 14:55:45,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:55:45,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 14:55:45,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:55:45,087 INFO L87 Difference]: Start difference. First operand 105 states and 145 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 14:55:45,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:55:45,346 INFO L93 Difference]: Finished difference Result 150 states and 213 transitions. [2021-05-02 14:55:45,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:55:45,346 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 75 [2021-05-02 14:55:45,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:55:45,349 INFO L225 Difference]: With dead ends: 150 [2021-05-02 14:55:45,349 INFO L226 Difference]: Without dead ends: 147 [2021-05-02 14:55:45,350 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 112.7ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:55:45,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-05-02 14:55:45,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 144. [2021-05-02 14:55:45,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 74 states have (on average 1.2027027027027026) internal successors, (89), 81 states have internal predecessors, (89), 60 states have call successors, (60), 10 states have call predecessors, (60), 9 states have return successors, (57), 52 states have call predecessors, (57), 57 states have call successors, (57) [2021-05-02 14:55:45,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 206 transitions. [2021-05-02 14:55:45,383 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 206 transitions. Word has length 75 [2021-05-02 14:55:45,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:55:45,384 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 206 transitions. [2021-05-02 14:55:45,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 14:55:45,384 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 206 transitions. [2021-05-02 14:55:45,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 14:55:45,386 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:55:45,386 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:55:45,610 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 14:55:45,610 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:55:45,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:55:45,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1245952186, now seen corresponding path program 2 times [2021-05-02 14:55:45,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:55:45,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632570309] [2021-05-02 14:55:45,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:55:45,626 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:55:45,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1478647013] [2021-05-02 14:55:45,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:55:45,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:55:45,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:55:45,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-02 14:55:45,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:55:45,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:45,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:45,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:45,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:45,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:45,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:45,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:45,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:45,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:45,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:45,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:45,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:45,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:45,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:45,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:45,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:45,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:45,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:45,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:45,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:45,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:45,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:45,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:45,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:45,957 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-05-02 14:55:45,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:55:45,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632570309] [2021-05-02 14:55:45,958 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:55:45,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478647013] [2021-05-02 14:55:45,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478647013] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:55:45,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:55:45,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:55:45,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475622973] [2021-05-02 14:55:45,958 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:55:45,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:55:45,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:55:45,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:55:45,959 INFO L87 Difference]: Start difference. First operand 144 states and 206 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 14:55:46,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:55:46,211 INFO L93 Difference]: Finished difference Result 152 states and 213 transitions. [2021-05-02 14:55:46,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:55:46,212 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 80 [2021-05-02 14:55:46,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:55:46,214 INFO L225 Difference]: With dead ends: 152 [2021-05-02 14:55:46,214 INFO L226 Difference]: Without dead ends: 150 [2021-05-02 14:55:46,214 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 111.0ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:55:46,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-05-02 14:55:46,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2021-05-02 14:55:46,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 77 states have (on average 1.1948051948051948) internal successors, (92), 84 states have internal predecessors, (92), 60 states have call successors, (60), 11 states have call predecessors, (60), 10 states have return successors, (57), 52 states have call predecessors, (57), 57 states have call successors, (57) [2021-05-02 14:55:46,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 209 transitions. [2021-05-02 14:55:46,236 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 209 transitions. Word has length 80 [2021-05-02 14:55:46,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:55:46,236 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 209 transitions. [2021-05-02 14:55:46,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 14:55:46,236 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 209 transitions. [2021-05-02 14:55:46,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-02 14:55:46,237 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:55:46,237 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 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] [2021-05-02 14:55:46,456 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:55:46,457 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:55:46,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:55:46,457 INFO L82 PathProgramCache]: Analyzing trace with hash 901388446, now seen corresponding path program 3 times [2021-05-02 14:55:46,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:55:46,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977074022] [2021-05-02 14:55:46,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:55:46,466 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:55:46,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1106529505] [2021-05-02 14:55:46,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 14:55:46,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 14:55:46,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:55:46,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-02 14:55:46,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:55:46,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:46,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:46,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:46,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:46,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:46,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:46,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:46,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:46,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:46,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:46,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:46,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:46,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:46,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:46,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:46,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:46,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:46,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:46,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:46,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:46,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:46,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:46,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:46,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:46,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:46,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:46,985 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 31 proven. 23 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-05-02 14:55:46,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:55:46,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977074022] [2021-05-02 14:55:46,985 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:55:46,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106529505] [2021-05-02 14:55:46,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106529505] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:55:46,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:55:46,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 14:55:46,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453875263] [2021-05-02 14:55:46,986 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 14:55:46,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:55:46,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 14:55:46,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:55:46,988 INFO L87 Difference]: Start difference. First operand 148 states and 209 transitions. Second operand has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 6 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 14:55:47,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:55:47,447 INFO L93 Difference]: Finished difference Result 160 states and 219 transitions. [2021-05-02 14:55:47,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 14:55:47,447 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 6 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 85 [2021-05-02 14:55:47,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:55:47,451 INFO L225 Difference]: With dead ends: 160 [2021-05-02 14:55:47,451 INFO L226 Difference]: Without dead ends: 158 [2021-05-02 14:55:47,452 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 303.6ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-05-02 14:55:47,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-05-02 14:55:47,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 156. [2021-05-02 14:55:47,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 83 states have (on average 1.180722891566265) internal successors, (98), 90 states have internal predecessors, (98), 60 states have call successors, (60), 13 states have call predecessors, (60), 12 states have return successors, (57), 52 states have call predecessors, (57), 57 states have call successors, (57) [2021-05-02 14:55:47,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 215 transitions. [2021-05-02 14:55:47,480 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 215 transitions. Word has length 85 [2021-05-02 14:55:47,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:55:47,481 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 215 transitions. [2021-05-02 14:55:47,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 6 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 14:55:47,481 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 215 transitions. [2021-05-02 14:55:47,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-02 14:55:47,483 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:55:47,483 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 14:55:47,708 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:55:47,709 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:55:47,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:55:47,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1507900548, now seen corresponding path program 2 times [2021-05-02 14:55:47,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:55:47,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798955901] [2021-05-02 14:55:47,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:55:47,718 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:55:47,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1872448557] [2021-05-02 14:55:47,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:55:47,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:55:47,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:55:47,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 14:55:47,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:55:47,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:47,993 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 27 proven. 35 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-05-02 14:55:47,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:55:47,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798955901] [2021-05-02 14:55:47,993 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:55:47,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872448557] [2021-05-02 14:55:47,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872448557] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:55:47,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:55:47,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:55:47,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919540999] [2021-05-02 14:55:47,994 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:55:47,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:55:47,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:55:47,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:55:47,995 INFO L87 Difference]: Start difference. First operand 156 states and 215 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-05-02 14:55:48,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:55:48,330 INFO L93 Difference]: Finished difference Result 219 states and 322 transitions. [2021-05-02 14:55:48,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:55:48,331 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 89 [2021-05-02 14:55:48,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:55:48,332 INFO L225 Difference]: With dead ends: 219 [2021-05-02 14:55:48,332 INFO L226 Difference]: Without dead ends: 217 [2021-05-02 14:55:48,333 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 95.2ms TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-02 14:55:48,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-05-02 14:55:48,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 190. [2021-05-02 14:55:48,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 96 states have (on average 1.2083333333333333) internal successors, (116), 103 states have internal predecessors, (116), 80 states have call successors, (80), 14 states have call predecessors, (80), 13 states have return successors, (77), 72 states have call predecessors, (77), 77 states have call successors, (77) [2021-05-02 14:55:48,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 273 transitions. [2021-05-02 14:55:48,362 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 273 transitions. Word has length 89 [2021-05-02 14:55:48,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:55:48,362 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 273 transitions. [2021-05-02 14:55:48,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-05-02 14:55:48,362 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 273 transitions. [2021-05-02 14:55:48,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-02 14:55:48,363 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:55:48,363 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 14:55:48,585 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 14:55:48,586 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:55:48,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:55:48,586 INFO L82 PathProgramCache]: Analyzing trace with hash -686534738, now seen corresponding path program 1 times [2021-05-02 14:55:48,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:55:48,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056537714] [2021-05-02 14:55:48,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:55:48,595 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:55:48,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2021873558] [2021-05-02 14:55:48,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:55:48,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:55:48,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-02 14:55:48,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:55:48,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:48,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:48,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:48,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:48,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:48,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:48,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:48,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:48,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:48,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:48,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:48,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:48,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:48,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:48,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:48,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:48,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:48,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:48,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:48,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:48,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:48,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:48,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:48,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:48,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:48,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:49,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:49,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:49,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:49,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:49,137 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-05-02 14:55:49,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:55:49,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056537714] [2021-05-02 14:55:49,137 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:55:49,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021873558] [2021-05-02 14:55:49,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021873558] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:55:49,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:55:49,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 14:55:49,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591563625] [2021-05-02 14:55:49,137 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 14:55:49,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:55:49,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 14:55:49,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-05-02 14:55:49,138 INFO L87 Difference]: Start difference. First operand 190 states and 273 transitions. Second operand has 17 states, 16 states have (on average 1.8125) internal successors, (29), 14 states have internal predecessors, (29), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2021-05-02 14:55:49,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:55:49,694 INFO L93 Difference]: Finished difference Result 225 states and 323 transitions. [2021-05-02 14:55:49,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 14:55:49,694 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.8125) internal successors, (29), 14 states have internal predecessors, (29), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) Word has length 91 [2021-05-02 14:55:49,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:55:49,696 INFO L225 Difference]: With dead ends: 225 [2021-05-02 14:55:49,696 INFO L226 Difference]: Without dead ends: 222 [2021-05-02 14:55:49,697 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 324.2ms TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-05-02 14:55:49,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-05-02 14:55:49,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 221. [2021-05-02 14:55:49,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 112 states have (on average 1.2053571428571428) internal successors, (135), 120 states have internal predecessors, (135), 93 states have call successors, (93), 16 states have call predecessors, (93), 15 states have return successors, (90), 84 states have call predecessors, (90), 90 states have call successors, (90) [2021-05-02 14:55:49,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 318 transitions. [2021-05-02 14:55:49,726 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 318 transitions. Word has length 91 [2021-05-02 14:55:49,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:55:49,727 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 318 transitions. [2021-05-02 14:55:49,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.8125) internal successors, (29), 14 states have internal predecessors, (29), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2021-05-02 14:55:49,727 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 318 transitions. [2021-05-02 14:55:49,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-02 14:55:49,728 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:55:49,728 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 6, 6, 6, 3, 3, 3, 3, 3, 3, 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] [2021-05-02 14:55:49,940 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 14:55:49,941 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:55:49,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:55:49,941 INFO L82 PathProgramCache]: Analyzing trace with hash -663071842, now seen corresponding path program 4 times [2021-05-02 14:55:49,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:55:49,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464291696] [2021-05-02 14:55:49,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:55:49,949 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:55:49,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [576814220] [2021-05-02 14:55:49,950 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:55:50,007 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 14:55:50,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:55:50,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 14:55:50,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:55:50,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:50,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:50,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:50,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:50,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:50,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:50,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:50,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:50,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:50,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:50,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:50,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:50,151 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2021-05-02 14:55:50,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:55:50,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464291696] [2021-05-02 14:55:50,152 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:55:50,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576814220] [2021-05-02 14:55:50,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576814220] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:55:50,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:55:50,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 14:55:50,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460095742] [2021-05-02 14:55:50,153 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 14:55:50,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:55:50,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 14:55:50,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 14:55:50,153 INFO L87 Difference]: Start difference. First operand 221 states and 318 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-05-02 14:55:50,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:55:50,233 INFO L93 Difference]: Finished difference Result 269 states and 387 transitions. [2021-05-02 14:55:50,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 14:55:50,234 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 100 [2021-05-02 14:55:50,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:55:50,235 INFO L225 Difference]: With dead ends: 269 [2021-05-02 14:55:50,235 INFO L226 Difference]: Without dead ends: 198 [2021-05-02 14:55:50,241 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 20.3ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:55:50,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-05-02 14:55:50,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 189. [2021-05-02 14:55:50,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 97 states have (on average 1.1443298969072164) internal successors, (111), 104 states have internal predecessors, (111), 76 states have call successors, (76), 16 states have call predecessors, (76), 15 states have return successors, (73), 68 states have call predecessors, (73), 73 states have call successors, (73) [2021-05-02 14:55:50,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 260 transitions. [2021-05-02 14:55:50,268 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 260 transitions. Word has length 100 [2021-05-02 14:55:50,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:55:50,270 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 260 transitions. [2021-05-02 14:55:50,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-05-02 14:55:50,270 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 260 transitions. [2021-05-02 14:55:50,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-05-02 14:55:50,271 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:55:50,271 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 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 14:55:50,495 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 14:55:50,495 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:55:50,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:55:50,496 INFO L82 PathProgramCache]: Analyzing trace with hash -428114403, now seen corresponding path program 1 times [2021-05-02 14:55:50,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:55:50,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704327652] [2021-05-02 14:55:50,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:55:50,502 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:55:50,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1445179330] [2021-05-02 14:55:50,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:55:50,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:55:50,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 58 conjunts are in the unsatisfiable core [2021-05-02 14:55:50,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:55:50,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:50,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:50,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:50,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:50,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:50,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:50,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:50,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:50,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:50,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:50,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:50,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:50,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:50,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:50,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:50,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:50,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:50,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:50,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:50,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:50,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:50,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:51,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:51,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:51,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:51,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:51,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:51,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:51,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:51,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:51,143 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 68 proven. 41 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2021-05-02 14:55:51,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:55:51,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704327652] [2021-05-02 14:55:51,144 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:55:51,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445179330] [2021-05-02 14:55:51,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445179330] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:55:51,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:55:51,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 14:55:51,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838375100] [2021-05-02 14:55:51,144 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 14:55:51,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:55:51,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 14:55:51,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:55:51,145 INFO L87 Difference]: Start difference. First operand 189 states and 260 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-02 14:55:57,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:55:57,823 INFO L93 Difference]: Finished difference Result 196 states and 266 transitions. [2021-05-02 14:55:57,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 14:55:57,824 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 107 [2021-05-02 14:55:57,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:55:57,825 INFO L225 Difference]: With dead ends: 196 [2021-05-02 14:55:57,825 INFO L226 Difference]: Without dead ends: 194 [2021-05-02 14:55:57,826 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 443.7ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-05-02 14:55:57,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-05-02 14:55:57,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 193. [2021-05-02 14:55:57,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 100 states have (on average 1.14) internal successors, (114), 107 states have internal predecessors, (114), 76 states have call successors, (76), 17 states have call predecessors, (76), 16 states have return successors, (73), 68 states have call predecessors, (73), 73 states have call successors, (73) [2021-05-02 14:55:57,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 263 transitions. [2021-05-02 14:55:57,851 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 263 transitions. Word has length 107 [2021-05-02 14:55:57,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:55:57,851 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 263 transitions. [2021-05-02 14:55:57,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-02 14:55:57,851 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 263 transitions. [2021-05-02 14:55:57,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-05-02 14:55:57,852 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:55:57,852 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-05-02 14:55:58,068 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:55:58,069 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:55:58,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:55:58,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1483033219, now seen corresponding path program 3 times [2021-05-02 14:55:58,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:55:58,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141286724] [2021-05-02 14:55:58,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:55:58,074 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:55:58,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [634456351] [2021-05-02 14:55:58,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:55:58,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 14:55:58,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:55:58,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 14:55:58,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:55:58,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:58,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:58,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:58,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:58,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:58,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:58,324 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 87 proven. 11 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2021-05-02 14:55:58,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:55:58,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141286724] [2021-05-02 14:55:58,325 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:55:58,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634456351] [2021-05-02 14:55:58,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634456351] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:55:58,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:55:58,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 14:55:58,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463778020] [2021-05-02 14:55:58,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 14:55:58,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:55:58,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 14:55:58,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:55:58,326 INFO L87 Difference]: Start difference. First operand 193 states and 263 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-05-02 14:55:58,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:55:58,410 INFO L93 Difference]: Finished difference Result 199 states and 268 transitions. [2021-05-02 14:55:58,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 14:55:58,411 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 111 [2021-05-02 14:55:58,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:55:58,412 INFO L225 Difference]: With dead ends: 199 [2021-05-02 14:55:58,412 INFO L226 Difference]: Without dead ends: 197 [2021-05-02 14:55:58,413 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 45.8ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:55:58,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-05-02 14:55:58,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 167. [2021-05-02 14:55:58,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 91 states have (on average 1.10989010989011) internal successors, (101), 97 states have internal predecessors, (101), 59 states have call successors, (59), 17 states have call predecessors, (59), 16 states have return successors, (56), 52 states have call predecessors, (56), 56 states have call successors, (56) [2021-05-02 14:55:58,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 216 transitions. [2021-05-02 14:55:58,435 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 216 transitions. Word has length 111 [2021-05-02 14:55:58,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:55:58,435 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 216 transitions. [2021-05-02 14:55:58,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-05-02 14:55:58,436 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 216 transitions. [2021-05-02 14:55:58,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-05-02 14:55:58,437 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:55:58,437 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-05-02 14:55:58,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 14:55:58,653 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:55:58,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:55:58,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1185765869, now seen corresponding path program 2 times [2021-05-02 14:55:58,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:55:58,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577178833] [2021-05-02 14:55:58,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:55:58,659 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:55:58,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [465411493] [2021-05-02 14:55:58,660 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:55:58,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:55:58,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:55:58,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 63 conjunts are in the unsatisfiable core [2021-05-02 14:55:58,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:55:58,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:58,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:58,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:58,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:58,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:58,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:58,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:58,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:58,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:58,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:58,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:58,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:58,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:58,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:58,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:58,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:58,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:58,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:58,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:58,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:58,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:58,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:58,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:58,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:58,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:58,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:58,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:58,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:58,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:58,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:58,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:58,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:59,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:59,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:59,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:59,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:59,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:59,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:59,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:59,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:59,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:59,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:59,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:59,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:59,381 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2021-05-02 14:55:59,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:59,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:59,485 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 75 proven. 65 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2021-05-02 14:55:59,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:55:59,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577178833] [2021-05-02 14:55:59,485 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:55:59,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465411493] [2021-05-02 14:55:59,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465411493] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:55:59,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:55:59,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 14:55:59,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822542957] [2021-05-02 14:55:59,486 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 14:55:59,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:55:59,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 14:55:59,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-02 14:55:59,487 INFO L87 Difference]: Start difference. First operand 167 states and 216 transitions. Second operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 8 states have call successors, (19) [2021-05-02 14:56:00,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:56:00,218 INFO L93 Difference]: Finished difference Result 202 states and 265 transitions. [2021-05-02 14:56:00,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 14:56:00,219 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 8 states have call successors, (19) Word has length 113 [2021-05-02 14:56:00,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:56:00,220 INFO L225 Difference]: With dead ends: 202 [2021-05-02 14:56:00,220 INFO L226 Difference]: Without dead ends: 199 [2021-05-02 14:56:00,221 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 597.5ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-05-02 14:56:00,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-05-02 14:56:00,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 198. [2021-05-02 14:56:00,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 107 states have (on average 1.1121495327102804) internal successors, (119), 114 states have internal predecessors, (119), 72 states have call successors, (72), 19 states have call predecessors, (72), 18 states have return successors, (69), 64 states have call predecessors, (69), 69 states have call successors, (69) [2021-05-02 14:56:00,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 260 transitions. [2021-05-02 14:56:00,247 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 260 transitions. Word has length 113 [2021-05-02 14:56:00,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:56:00,247 INFO L480 AbstractCegarLoop]: Abstraction has 198 states and 260 transitions. [2021-05-02 14:56:00,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 8 states have call successors, (19) [2021-05-02 14:56:00,247 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 260 transitions. [2021-05-02 14:56:00,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-05-02 14:56:00,250 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:56:00,250 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 14:56:00,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 14:56:00,465 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:56:00,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:56:00,465 INFO L82 PathProgramCache]: Analyzing trace with hash 884638574, now seen corresponding path program 3 times [2021-05-02 14:56:00,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:56:00,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666146591] [2021-05-02 14:56:00,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:56:00,472 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:56:00,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [593023903] [2021-05-02 14:56:00,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:56:00,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 14:56:00,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:56:00,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 14:56:00,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:56:00,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:00,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:00,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:00,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:00,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:00,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:00,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:00,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:00,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:00,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:00,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:00,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:00,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:00,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:00,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:00,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:00,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:00,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:00,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:00,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:00,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:00,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:00,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:00,775 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-05-02 14:56:00,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:56:00,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666146591] [2021-05-02 14:56:00,775 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:56:00,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593023903] [2021-05-02 14:56:00,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593023903] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:56:00,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:56:00,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 14:56:00,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940513205] [2021-05-02 14:56:00,778 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 14:56:00,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:56:00,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 14:56:00,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:56:00,778 INFO L87 Difference]: Start difference. First operand 198 states and 260 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-05-02 14:56:01,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:56:01,032 INFO L93 Difference]: Finished difference Result 248 states and 345 transitions. [2021-05-02 14:56:01,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 14:56:01,032 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 116 [2021-05-02 14:56:01,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:56:01,034 INFO L225 Difference]: With dead ends: 248 [2021-05-02 14:56:01,034 INFO L226 Difference]: Without dead ends: 240 [2021-05-02 14:56:01,036 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 93.0ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:56:01,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-05-02 14:56:01,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 221. [2021-05-02 14:56:01,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 115 states have (on average 1.1478260869565218) internal successors, (132), 117 states have internal predecessors, (132), 87 states have call successors, (87), 19 states have call predecessors, (87), 18 states have return successors, (84), 84 states have call predecessors, (84), 84 states have call successors, (84) [2021-05-02 14:56:01,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 303 transitions. [2021-05-02 14:56:01,078 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 303 transitions. Word has length 116 [2021-05-02 14:56:01,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:56:01,079 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 303 transitions. [2021-05-02 14:56:01,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-05-02 14:56:01,079 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 303 transitions. [2021-05-02 14:56:01,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-02 14:56:01,080 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:56:01,080 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 6, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-05-02 14:56:01,296 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 14:56:01,297 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:56:01,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:56:01,297 INFO L82 PathProgramCache]: Analyzing trace with hash -743412771, now seen corresponding path program 2 times [2021-05-02 14:56:01,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:56:01,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717529617] [2021-05-02 14:56:01,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:56:01,304 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:56:01,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [30341398] [2021-05-02 14:56:01,304 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:56:01,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:56:01,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:56:01,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 14:56:01,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:56:01,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:01,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:01,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:01,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:01,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:01,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:01,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:01,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:01,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:01,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:01,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:01,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:01,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:01,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:01,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:01,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:01,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:01,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:01,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:01,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:01,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:01,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:01,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:01,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:01,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:01,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:01,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:01,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:01,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:01,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:01,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:01,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:01,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:01,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:01,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:01,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:01,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:01,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:01,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:01,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:01,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:01,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:01,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:01,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:01,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:01,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:01,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:01,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:01,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:01,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:01,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:01,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:01,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:01,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:01,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:01,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:01,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:01,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:01,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:01,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:01,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:01,933 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 49 proven. 62 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2021-05-02 14:56:01,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:56:01,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717529617] [2021-05-02 14:56:01,934 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:56:01,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30341398] [2021-05-02 14:56:01,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30341398] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:56:01,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:56:01,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 14:56:01,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423045696] [2021-05-02 14:56:01,936 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 14:56:01,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:56:01,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 14:56:01,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-05-02 14:56:01,936 INFO L87 Difference]: Start difference. First operand 221 states and 303 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 15 states have internal predecessors, (35), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2021-05-02 14:56:03,708 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2021-05-02 14:56:04,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:56:04,361 INFO L93 Difference]: Finished difference Result 279 states and 389 transitions. [2021-05-02 14:56:04,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-02 14:56:04,361 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 15 states have internal predecessors, (35), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) Word has length 122 [2021-05-02 14:56:04,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:56:04,363 INFO L225 Difference]: With dead ends: 279 [2021-05-02 14:56:04,363 INFO L226 Difference]: Without dead ends: 277 [2021-05-02 14:56:04,363 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 1106.5ms TimeCoverageRelationStatistics Valid=301, Invalid=1505, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 14:56:04,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-05-02 14:56:04,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 271. [2021-05-02 14:56:04,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 139 states have (on average 1.158273381294964) internal successors, (161), 141 states have internal predecessors, (161), 111 states have call successors, (111), 21 states have call predecessors, (111), 20 states have return successors, (108), 108 states have call predecessors, (108), 108 states have call successors, (108) [2021-05-02 14:56:04,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 380 transitions. [2021-05-02 14:56:04,400 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 380 transitions. Word has length 122 [2021-05-02 14:56:04,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:56:04,401 INFO L480 AbstractCegarLoop]: Abstraction has 271 states and 380 transitions. [2021-05-02 14:56:04,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 15 states have internal predecessors, (35), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2021-05-02 14:56:04,401 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 380 transitions. [2021-05-02 14:56:04,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-05-02 14:56:04,402 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:56:04,402 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2021-05-02 14:56:04,616 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:56:04,617 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:56:04,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:56:04,617 INFO L82 PathProgramCache]: Analyzing trace with hash 541794983, now seen corresponding path program 3 times [2021-05-02 14:56:04,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:56:04,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5780671] [2021-05-02 14:56:04,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:56:04,632 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:56:04,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1137472449] [2021-05-02 14:56:04,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:56:04,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 14:56:04,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:56:04,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 70 conjunts are in the unsatisfiable core [2021-05-02 14:56:04,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:56:04,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:04,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:04,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:05,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:05,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:05,122 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 78 proven. 41 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2021-05-02 14:56:05,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:56:05,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5780671] [2021-05-02 14:56:05,123 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:56:05,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137472449] [2021-05-02 14:56:05,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137472449] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:56:05,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:56:05,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 14:56:05,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44948142] [2021-05-02 14:56:05,124 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 14:56:05,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:56:05,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 14:56:05,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:56:05,125 INFO L87 Difference]: Start difference. First operand 271 states and 380 transitions. Second operand has 15 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 7 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-02 14:56:05,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:56:05,898 INFO L93 Difference]: Finished difference Result 313 states and 432 transitions. [2021-05-02 14:56:05,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 14:56:05,899 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 7 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) Word has length 127 [2021-05-02 14:56:05,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:56:05,901 INFO L225 Difference]: With dead ends: 313 [2021-05-02 14:56:05,901 INFO L226 Difference]: Without dead ends: 311 [2021-05-02 14:56:05,902 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 295.7ms TimeCoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-05-02 14:56:05,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-05-02 14:56:05,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 308. [2021-05-02 14:56:05,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 160 states have (on average 1.15) internal successors, (184), 162 states have internal predecessors, (184), 123 states have call successors, (123), 25 states have call predecessors, (123), 24 states have return successors, (120), 120 states have call predecessors, (120), 120 states have call successors, (120) [2021-05-02 14:56:05,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 427 transitions. [2021-05-02 14:56:05,944 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 427 transitions. Word has length 127 [2021-05-02 14:56:05,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:56:05,945 INFO L480 AbstractCegarLoop]: Abstraction has 308 states and 427 transitions. [2021-05-02 14:56:05,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 7 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-02 14:56:05,945 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 427 transitions. [2021-05-02 14:56:05,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-05-02 14:56:05,946 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:56:05,946 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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 14:56:06,164 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:56:06,165 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:56:06,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:56:06,165 INFO L82 PathProgramCache]: Analyzing trace with hash -2138166692, now seen corresponding path program 4 times [2021-05-02 14:56:06,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:56:06,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561506435] [2021-05-02 14:56:06,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:56:06,171 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:56:06,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [553055627] [2021-05-02 14:56:06,172 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:56:06,230 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 14:56:06,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:56:06,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 69 conjunts are in the unsatisfiable core [2021-05-02 14:56:06,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:56:06,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:06,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:06,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:06,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:06,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:06,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:06,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:06,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:06,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:06,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:06,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:06,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:06,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:06,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:06,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:06,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:06,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:06,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:06,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:06,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:06,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:06,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:06,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:06,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:06,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:06,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:06,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:06,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:06,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:06,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:06,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:06,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:06,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:06,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:06,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:06,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:06,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:06,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:06,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:06,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:06,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:06,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:06,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:06,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:06,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:06,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:06,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:06,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:06,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:06,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:06,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:06,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:06,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:06,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:06,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:06,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:06,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:06,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:06,944 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 119 proven. 93 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2021-05-02 14:56:06,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:56:06,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561506435] [2021-05-02 14:56:06,944 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:56:06,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553055627] [2021-05-02 14:56:06,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553055627] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:56:06,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:56:06,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 14:56:06,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293154616] [2021-05-02 14:56:06,945 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 14:56:06,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:56:06,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 14:56:06,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-05-02 14:56:06,946 INFO L87 Difference]: Start difference. First operand 308 states and 427 transitions. Second operand has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) [2021-05-02 14:56:10,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:56:10,122 INFO L93 Difference]: Finished difference Result 328 states and 443 transitions. [2021-05-02 14:56:10,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 14:56:10,123 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) Word has length 129 [2021-05-02 14:56:10,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:56:10,125 INFO L225 Difference]: With dead ends: 328 [2021-05-02 14:56:10,125 INFO L226 Difference]: Without dead ends: 326 [2021-05-02 14:56:10,125 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 452.7ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-05-02 14:56:10,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-05-02 14:56:10,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 324. [2021-05-02 14:56:10,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 172 states have (on average 1.1395348837209303) internal successors, (196), 174 states have internal predecessors, (196), 123 states have call successors, (123), 29 states have call predecessors, (123), 28 states have return successors, (120), 120 states have call predecessors, (120), 120 states have call successors, (120) [2021-05-02 14:56:10,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 439 transitions. [2021-05-02 14:56:10,167 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 439 transitions. Word has length 129 [2021-05-02 14:56:10,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:56:10,168 INFO L480 AbstractCegarLoop]: Abstraction has 324 states and 439 transitions. [2021-05-02 14:56:10,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) [2021-05-02 14:56:10,168 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 439 transitions. [2021-05-02 14:56:10,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-05-02 14:56:10,169 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:56:10,169 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2021-05-02 14:56:10,384 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-02 14:56:10,385 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:56:10,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:56:10,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1899875875, now seen corresponding path program 5 times [2021-05-02 14:56:10,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:56:10,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123395448] [2021-05-02 14:56:10,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:56:10,393 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:56:10,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [617475543] [2021-05-02 14:56:10,393 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:56:10,835 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-02 14:56:10,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:56:10,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 74 conjunts are in the unsatisfiable core [2021-05-02 14:56:10,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:56:10,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:10,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:10,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:10,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:10,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:10,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:10,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:10,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:10,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:10,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:10,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:10,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:10,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:10,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:10,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:10,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:10,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:10,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:11,978 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 91 proven. 81 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-05-02 14:56:11,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:56:11,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123395448] [2021-05-02 14:56:11,979 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:56:11,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617475543] [2021-05-02 14:56:11,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617475543] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:56:11,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:56:11,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-02 14:56:11,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185826532] [2021-05-02 14:56:11,979 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 14:56:11,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:56:11,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 14:56:11,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-05-02 14:56:11,980 INFO L87 Difference]: Start difference. First operand 324 states and 439 transitions. Second operand has 20 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 15 states have internal predecessors, (35), 10 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 10 states have call predecessors, (22), 9 states have call successors, (22) [2021-05-02 14:56:13,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:56:13,474 INFO L93 Difference]: Finished difference Result 347 states and 458 transitions. [2021-05-02 14:56:13,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 14:56:13,476 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 15 states have internal predecessors, (35), 10 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 10 states have call predecessors, (22), 9 states have call successors, (22) Word has length 132 [2021-05-02 14:56:13,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:56:13,478 INFO L225 Difference]: With dead ends: 347 [2021-05-02 14:56:13,478 INFO L226 Difference]: Without dead ends: 345 [2021-05-02 14:56:13,478 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1113.5ms TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2021-05-02 14:56:13,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-05-02 14:56:13,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 340. [2021-05-02 14:56:13,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 184 states have (on average 1.1304347826086956) internal successors, (208), 186 states have internal predecessors, (208), 123 states have call successors, (123), 33 states have call predecessors, (123), 32 states have return successors, (120), 120 states have call predecessors, (120), 120 states have call successors, (120) [2021-05-02 14:56:13,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 451 transitions. [2021-05-02 14:56:13,527 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 451 transitions. Word has length 132 [2021-05-02 14:56:13,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:56:13,527 INFO L480 AbstractCegarLoop]: Abstraction has 340 states and 451 transitions. [2021-05-02 14:56:13,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 15 states have internal predecessors, (35), 10 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 10 states have call predecessors, (22), 9 states have call successors, (22) [2021-05-02 14:56:13,527 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 451 transitions. [2021-05-02 14:56:13,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-05-02 14:56:13,529 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:56:13,529 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:56:13,733 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-02 14:56:13,734 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:56:13,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:56:13,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1068997356, now seen corresponding path program 4 times [2021-05-02 14:56:13,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:56:13,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114057829] [2021-05-02 14:56:13,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:56:13,748 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:56:13,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [935109547] [2021-05-02 14:56:13,748 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:56:13,848 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 14:56:13,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:56:13,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 62 conjunts are in the unsatisfiable core [2021-05-02 14:56:13,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:56:13,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:13,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:13,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:13,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:13,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:13,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:14,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:14,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:14,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:14,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:14,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:14,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:14,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:14,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:14,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:14,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:14,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:14,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:14,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:14,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:14,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:14,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:14,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:14,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:14,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:14,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:14,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:14,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:14,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:14,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:14,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:14,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:14,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:14,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:14,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:14,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:14,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:14,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:14,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:14,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:14,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:14,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:14,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:14,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:14,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:14,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:14,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:14,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:14,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:14,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:14,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:14,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:14,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:14,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:14,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:14,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:14,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:14,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:14,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:14,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:14,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:14,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:14,828 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 84 proven. 85 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-05-02 14:56:14,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:56:14,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114057829] [2021-05-02 14:56:14,829 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:56:14,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935109547] [2021-05-02 14:56:14,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935109547] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:56:14,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:56:14,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 14:56:14,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265202090] [2021-05-02 14:56:14,829 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 14:56:14,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:56:14,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 14:56:14,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-02 14:56:14,830 INFO L87 Difference]: Start difference. First operand 340 states and 451 transitions. Second operand has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 7 states have call predecessors, (23), 8 states have call successors, (23) [2021-05-02 14:56:16,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:56:16,170 INFO L93 Difference]: Finished difference Result 376 states and 506 transitions. [2021-05-02 14:56:16,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 14:56:16,170 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 7 states have call predecessors, (23), 8 states have call successors, (23) Word has length 135 [2021-05-02 14:56:16,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:56:16,172 INFO L225 Difference]: With dead ends: 376 [2021-05-02 14:56:16,172 INFO L226 Difference]: Without dead ends: 373 [2021-05-02 14:56:16,174 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 700.4ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-05-02 14:56:16,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-05-02 14:56:16,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 371. [2021-05-02 14:56:16,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 198 states have (on average 1.1363636363636365) internal successors, (225), 200 states have internal predecessors, (225), 139 states have call successors, (139), 34 states have call predecessors, (139), 33 states have return successors, (136), 136 states have call predecessors, (136), 136 states have call successors, (136) [2021-05-02 14:56:16,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 500 transitions. [2021-05-02 14:56:16,271 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 500 transitions. Word has length 135 [2021-05-02 14:56:16,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:56:16,272 INFO L480 AbstractCegarLoop]: Abstraction has 371 states and 500 transitions. [2021-05-02 14:56:16,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 7 states have call predecessors, (23), 8 states have call successors, (23) [2021-05-02 14:56:16,272 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 500 transitions. [2021-05-02 14:56:16,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-05-02 14:56:16,273 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:56:16,273 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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 14:56:16,505 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:56:16,505 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:56:16,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:56:16,505 INFO L82 PathProgramCache]: Analyzing trace with hash -896647763, now seen corresponding path program 5 times [2021-05-02 14:56:16,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:56:16,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139323153] [2021-05-02 14:56:16,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:56:16,512 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:56:16,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [288838224] [2021-05-02 14:56:16,517 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:56:16,707 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-02 14:56:16,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:56:16,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 95 conjunts are in the unsatisfiable core [2021-05-02 14:56:16,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:56:16,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:16,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:16,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:16,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:16,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:16,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:16,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:16,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:16,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:16,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:16,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:16,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:16,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:16,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:16,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:16,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:16,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:16,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:16,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:16,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:17,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:17,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:17,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:17,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:17,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:17,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:17,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:17,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:17,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:17,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:17,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:17,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:17,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:17,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:17,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:17,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:17,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:17,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:17,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:17,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:17,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:17,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:17,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:17,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:17,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:17,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:17,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:17,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:17,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:17,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:17,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:17,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:17,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:17,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:17,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:17,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:17,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:17,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:17,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:17,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:18,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:18,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:18,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:18,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:18,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:18,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:18,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:18,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:18,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:18,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:18,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:18,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:18,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:18,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:18,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:18,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:18,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:18,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:18,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:18,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:18,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:18,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:18,255 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 102 proven. 153 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2021-05-02 14:56:18,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:56:18,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139323153] [2021-05-02 14:56:18,255 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:56:18,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288838224] [2021-05-02 14:56:18,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288838224] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:56:18,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:56:18,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-05-02 14:56:18,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057613540] [2021-05-02 14:56:18,256 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 14:56:18,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:56:18,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 14:56:18,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-05-02 14:56:18,257 INFO L87 Difference]: Start difference. First operand 371 states and 500 transitions. Second operand has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 16 states have internal predecessors, (36), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 9 states have call predecessors, (23), 8 states have call successors, (23) [2021-05-02 14:56:24,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:56:24,009 INFO L93 Difference]: Finished difference Result 425 states and 570 transitions. [2021-05-02 14:56:24,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 14:56:24,010 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 16 states have internal predecessors, (36), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 9 states have call predecessors, (23), 8 states have call successors, (23) Word has length 138 [2021-05-02 14:56:24,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:56:24,012 INFO L225 Difference]: With dead ends: 425 [2021-05-02 14:56:24,012 INFO L226 Difference]: Without dead ends: 423 [2021-05-02 14:56:24,012 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1235.9ms TimeCoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-05-02 14:56:24,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-05-02 14:56:24,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 419. [2021-05-02 14:56:24,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 224 states have (on average 1.1383928571428572) internal successors, (255), 227 states have internal predecessors, (255), 156 states have call successors, (156), 39 states have call predecessors, (156), 38 states have return successors, (153), 152 states have call predecessors, (153), 153 states have call successors, (153) [2021-05-02 14:56:24,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 564 transitions. [2021-05-02 14:56:24,153 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 564 transitions. Word has length 138 [2021-05-02 14:56:24,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:56:24,153 INFO L480 AbstractCegarLoop]: Abstraction has 419 states and 564 transitions. [2021-05-02 14:56:24,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 16 states have internal predecessors, (36), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 9 states have call predecessors, (23), 8 states have call successors, (23) [2021-05-02 14:56:24,154 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 564 transitions. [2021-05-02 14:56:24,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-05-02 14:56:24,155 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:56:24,155 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 17, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2021-05-02 14:56:24,376 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-02 14:56:24,377 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:56:24,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:56:24,377 INFO L82 PathProgramCache]: Analyzing trace with hash -206620137, now seen corresponding path program 1 times [2021-05-02 14:56:24,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:56:24,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508851427] [2021-05-02 14:56:24,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:56:24,383 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:56:24,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1744718696] [2021-05-02 14:56:24,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:56:24,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:56:24,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 69 conjunts are in the unsatisfiable core [2021-05-02 14:56:24,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:56:24,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:24,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:24,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:24,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:24,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:24,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:24,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:24,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:24,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:24,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:24,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:24,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:24,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:24,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:24,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:24,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:24,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:24,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:24,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:24,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:24,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:24,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:24,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:24,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:24,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:24,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:24,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:24,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:24,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:24,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:24,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:24,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:24,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:24,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:24,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:24,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:24,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:24,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:24,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:24,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:25,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:25,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:25,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:25,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:56:25,146 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 59 proven. 123 refuted. 0 times theorem prover too weak. 499 trivial. 0 not checked. [2021-05-02 14:56:25,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:56:25,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508851427] [2021-05-02 14:56:25,146 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:56:25,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744718696] [2021-05-02 14:56:25,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744718696] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:56:25,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:56:25,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-02 14:56:25,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854439341] [2021-05-02 14:56:25,147 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 14:56:25,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:56:25,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 14:56:25,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-05-02 14:56:25,148 INFO L87 Difference]: Start difference. First operand 419 states and 564 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 8 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2021-05-02 14:56:26,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:56:26,168 INFO L93 Difference]: Finished difference Result 429 states and 573 transitions. [2021-05-02 14:56:26,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 14:56:26,169 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 8 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 143 [2021-05-02 14:56:26,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:56:26,172 INFO L225 Difference]: With dead ends: 429 [2021-05-02 14:56:26,172 INFO L226 Difference]: Without dead ends: 425 [2021-05-02 14:56:26,172 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 123 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 637.6ms TimeCoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-05-02 14:56:26,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-05-02 14:56:26,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 422. [2021-05-02 14:56:26,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 227 states have (on average 1.13215859030837) internal successors, (257), 229 states have internal predecessors, (257), 155 states have call successors, (155), 40 states have call predecessors, (155), 39 states have return successors, (152), 152 states have call predecessors, (152), 152 states have call successors, (152) [2021-05-02 14:56:26,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 564 transitions. [2021-05-02 14:56:26,233 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 564 transitions. Word has length 143 [2021-05-02 14:56:26,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:56:26,233 INFO L480 AbstractCegarLoop]: Abstraction has 422 states and 564 transitions. [2021-05-02 14:56:26,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 8 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2021-05-02 14:56:26,233 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 564 transitions. [2021-05-02 14:56:26,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-05-02 14:56:26,234 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:56:26,235 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 17, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 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] [2021-05-02 14:56:26,458 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:56:26,458 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:56:26,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:56:26,458 INFO L82 PathProgramCache]: Analyzing trace with hash 391502270, now seen corresponding path program 6 times [2021-05-02 14:56:26,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:56:26,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734747698] [2021-05-02 14:56:26,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:56:26,465 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:56:26,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1618897825] [2021-05-02 14:56:26,466 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true