/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/ps5-ll_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 04:59:14,868 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 04:59:14,869 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 04:59:14,894 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 04:59:14,902 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 04:59:14,903 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 04:59:14,903 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 04:59:14,904 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 04:59:14,905 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 04:59:14,906 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 04:59:14,907 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 04:59:14,908 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 04:59:14,909 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 04:59:14,910 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 04:59:14,911 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 04:59:14,912 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 04:59:14,914 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 04:59:14,919 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 04:59:14,920 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 04:59:14,921 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 04:59:14,921 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 [2021-05-06 04:59:14,945 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 04:59:14,945 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 04:59:14,946 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 04:59:14,947 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 04:59:14,947 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 04:59:14,947 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 04:59:14,947 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 04:59:14,947 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 04:59:14,947 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 04:59:14,948 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 04:59:14,948 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 04:59:14,948 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 04:59:14,948 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 04:59:14,948 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 04:59:14,949 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 04:59:14,949 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 04:59:14,949 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 04:59:14,949 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 04:59:14,949 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 04:59:14,950 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 04:59:14,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 04:59:14,950 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 04:59:14,950 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 04:59:14,950 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 04:59:14,950 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 04:59:14,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 04:59:14,951 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 04:59:14,951 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 04:59:14,951 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 04:59:15,213 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 04:59:15,229 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 04:59:15,231 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 04:59:15,231 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 04:59:15,232 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 04:59:15,233 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps5-ll_valuebound5.c [2021-05-06 04:59:15,286 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d61c69418/cff38a56aa50496dac6520901d18d54c/FLAG10cb5dd39 [2021-05-06 04:59:15,698 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 04:59:15,698 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps5-ll_valuebound5.c [2021-05-06 04:59:15,704 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d61c69418/cff38a56aa50496dac6520901d18d54c/FLAG10cb5dd39 [2021-05-06 04:59:15,719 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d61c69418/cff38a56aa50496dac6520901d18d54c [2021-05-06 04:59:15,723 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 04:59:15,725 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 04:59:15,728 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 04:59:15,729 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 04:59:15,732 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 04:59:15,733 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 04:59:15" (1/1) ... [2021-05-06 04:59:15,734 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5864a6d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:59:15, skipping insertion in model container [2021-05-06 04:59:15,734 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 04:59:15" (1/1) ... [2021-05-06 04:59:15,740 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 04:59:15,756 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 04:59:15,898 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/ps5-ll_valuebound5.c[458,471] [2021-05-06 04:59:15,917 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 04:59:15,928 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 04:59:15,979 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/ps5-ll_valuebound5.c[458,471] [2021-05-06 04:59:15,989 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 04:59:16,002 INFO L208 MainTranslator]: Completed translation [2021-05-06 04:59:16,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:59:16 WrapperNode [2021-05-06 04:59:16,003 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 04:59:16,003 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 04:59:16,004 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 04:59:16,005 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 04:59:16,012 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:59:16" (1/1) ... [2021-05-06 04:59:16,013 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:59:16" (1/1) ... [2021-05-06 04:59:16,019 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:59:16" (1/1) ... [2021-05-06 04:59:16,019 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:59:16" (1/1) ... [2021-05-06 04:59:16,030 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:59:16" (1/1) ... [2021-05-06 04:59:16,033 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:59:16" (1/1) ... [2021-05-06 04:59:16,035 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:59:16" (1/1) ... [2021-05-06 04:59:16,040 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 04:59:16,041 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 04:59:16,041 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 04:59:16,041 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 04:59:16,042 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:59:16" (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 [2021-05-06 04:59:16,111 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 04:59:16,111 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 04:59:16,111 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 04:59:16,112 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 04:59:16,112 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 04:59:16,112 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 04:59:16,112 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 04:59:16,113 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 04:59:16,113 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 04:59:16,113 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 04:59:16,113 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-06 04:59:16,113 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 04:59:16,114 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 04:59:16,114 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 04:59:16,115 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 04:59:16,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 04:59:16,115 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 04:59:16,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 04:59:16,115 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 04:59:16,115 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 04:59:16,395 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 04:59:16,396 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 04:59:16,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 04:59:16 BoogieIcfgContainer [2021-05-06 04:59:16,397 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 04:59:16,398 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 04:59:16,398 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 04:59:16,410 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 04:59:16,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 04:59:15" (1/3) ... [2021-05-06 04:59:16,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15cf1786 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 04:59:16, skipping insertion in model container [2021-05-06 04:59:16,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:59:16" (2/3) ... [2021-05-06 04:59:16,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15cf1786 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 04:59:16, skipping insertion in model container [2021-05-06 04:59:16,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 04:59:16" (3/3) ... [2021-05-06 04:59:16,413 INFO L111 eAbstractionObserver]: Analyzing ICFG ps5-ll_valuebound5.c [2021-05-06 04:59:16,417 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 04:59:16,420 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 04:59:16,451 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 04:59:16,485 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 04:59:16,485 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 04:59:16,485 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 04:59:16,485 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 04:59:16,485 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 04:59:16,485 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 04:59:16,486 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 04:59:16,486 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 04:59:16,506 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 04:59:16,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 04:59:16,510 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:59:16,511 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:59:16,511 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:59:16,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:59:16,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1098891495, now seen corresponding path program 1 times [2021-05-06 04:59:16,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:59:16,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988701570] [2021-05-06 04:59:16,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:59:16,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:59:16,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 04:59:16,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:59:16,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 04:59:16,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:59:16,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 04:59:16,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:59:16,755 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 04:59:16,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:59:16,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988701570] [2021-05-06 04:59:16,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988701570] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 04:59:16,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 04:59:16,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 04:59:16,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039949136] [2021-05-06 04:59:16,760 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 04:59:16,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:59:16,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 04:59:16,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 04:59:16,772 INFO L87 Difference]: Start difference. First operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 04:59:16,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:59:16,843 INFO L93 Difference]: Finished difference Result 51 states and 69 transitions. [2021-05-06 04:59:16,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 04:59:16,845 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-06 04:59:16,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:59:16,850 INFO L225 Difference]: With dead ends: 51 [2021-05-06 04:59:16,851 INFO L226 Difference]: Without dead ends: 24 [2021-05-06 04:59:16,853 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 04:59:16,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-06 04:59:16,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-05-06 04:59:16,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 04:59:16,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-05-06 04:59:16,897 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 22 [2021-05-06 04:59:16,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:59:16,897 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-05-06 04:59:16,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 04:59:16,898 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-05-06 04:59:16,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 04:59:16,898 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:59:16,899 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:59:16,899 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 04:59:16,899 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:59:16,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:59:16,899 INFO L82 PathProgramCache]: Analyzing trace with hash 769620075, now seen corresponding path program 1 times [2021-05-06 04:59:16,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:59:16,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703180140] [2021-05-06 04:59:16,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:59:16,914 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:59:16,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1271408951] [2021-05-06 04:59:16,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-06 04:59:17,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:59:17,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 04:59:17,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:59:17,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:59:17,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 04:59:17,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:59:17,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703180140] [2021-05-06 04:59:17,187 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:59:17,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271408951] [2021-05-06 04:59:17,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271408951] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 04:59:17,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 04:59:17,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 04:59:17,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179027142] [2021-05-06 04:59:17,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 04:59:17,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:59:17,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 04:59:17,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 04:59:17,192 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 04:59:17,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:59:17,234 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2021-05-06 04:59:17,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 04:59:17,235 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2021-05-06 04:59:17,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:59:17,237 INFO L225 Difference]: With dead ends: 35 [2021-05-06 04:59:17,237 INFO L226 Difference]: Without dead ends: 31 [2021-05-06 04:59:17,238 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.4ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 04:59:17,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-06 04:59:17,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-05-06 04:59:17,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 04:59:17,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-05-06 04:59:17,247 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 22 [2021-05-06 04:59:17,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:59:17,248 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-05-06 04:59:17,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 04:59:17,248 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-05-06 04:59:17,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 04:59:17,249 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:59:17,249 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:59:17,452 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 04:59:17,453 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:59:17,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:59:17,453 INFO L82 PathProgramCache]: Analyzing trace with hash 645812411, now seen corresponding path program 1 times [2021-05-06 04:59:17,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:59:17,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137162288] [2021-05-06 04:59:17,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:59:17,466 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:59:17,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1704014862] [2021-05-06 04:59:17,466 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 [2021-05-06 04:59:17,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:59:17,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 04:59:17,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:59:17,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:59:17,676 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 04:59:17,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:59:17,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137162288] [2021-05-06 04:59:17,676 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:59:17,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704014862] [2021-05-06 04:59:17,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704014862] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:59:17,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:59:17,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 04:59:17,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890920699] [2021-05-06 04:59:17,677 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 04:59:17,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:59:17,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 04:59:17,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 04:59:17,678 INFO L87 Difference]: Start difference. First operand 31 states and 34 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 04:59:17,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:59:17,781 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2021-05-06 04:59:17,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 04:59:17,781 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2021-05-06 04:59:17,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:59:17,785 INFO L225 Difference]: With dead ends: 42 [2021-05-06 04:59:17,785 INFO L226 Difference]: Without dead ends: 40 [2021-05-06 04:59:17,787 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.3ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 04:59:17,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-06 04:59:17,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-05-06 04:59:17,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 04:59:17,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2021-05-06 04:59:17,806 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 29 [2021-05-06 04:59:17,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:59:17,807 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2021-05-06 04:59:17,807 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 04:59:17,807 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2021-05-06 04:59:17,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 04:59:17,808 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:59:17,808 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:59:18,008 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:59:18,009 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:59:18,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:59:18,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1415216747, now seen corresponding path program 2 times [2021-05-06 04:59:18,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:59:18,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682697940] [2021-05-06 04:59:18,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:59:18,029 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:59:18,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [979423562] [2021-05-06 04:59:18,030 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 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 [2021-05-06 04:59:18,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 04:59:18,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:59:18,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 04:59:18,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:59:18,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:59:18,348 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-06 04:59:18,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:59:18,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682697940] [2021-05-06 04:59:18,348 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:59:18,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979423562] [2021-05-06 04:59:18,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979423562] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:59:18,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:59:18,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 04:59:18,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017475298] [2021-05-06 04:59:18,349 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 04:59:18,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:59:18,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 04:59:18,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 04:59:18,350 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 04:59:18,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:59:18,488 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2021-05-06 04:59:18,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 04:59:18,490 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2021-05-06 04:59:18,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:59:18,492 INFO L225 Difference]: With dead ends: 51 [2021-05-06 04:59:18,492 INFO L226 Difference]: Without dead ends: 49 [2021-05-06 04:59:18,493 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 69.0ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-06 04:59:18,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-06 04:59:18,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2021-05-06 04:59:18,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 31 states have internal predecessors, (32), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 04:59:18,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2021-05-06 04:59:18,515 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 36 [2021-05-06 04:59:18,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:59:18,515 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2021-05-06 04:59:18,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 04:59:18,515 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2021-05-06 04:59:18,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-06 04:59:18,518 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:59:18,518 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:59:18,723 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:59:18,725 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:59:18,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:59:18,729 INFO L82 PathProgramCache]: Analyzing trace with hash 463554397, now seen corresponding path program 1 times [2021-05-06 04:59:18,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:59:18,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455657759] [2021-05-06 04:59:18,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:59:18,741 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:59:18,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [502287365] [2021-05-06 04:59:18,741 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 [2021-05-06 04:59:18,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:59:18,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 04:59:18,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:59:18,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:59:18,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:59:18,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:59:18,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:59:18,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:59:18,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:59:18,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:59:18,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:59:18,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:59:19,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:59:19,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:59:19,062 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 04:59:19,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:59:19,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455657759] [2021-05-06 04:59:19,063 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:59:19,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502287365] [2021-05-06 04:59:19,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502287365] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:59:19,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:59:19,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 04:59:19,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592694023] [2021-05-06 04:59:19,070 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 04:59:19,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:59:19,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 04:59:19,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 04:59:19,072 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-06 04:59:19,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:59:19,141 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2021-05-06 04:59:19,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 04:59:19,141 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 40 [2021-05-06 04:59:19,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:59:19,143 INFO L225 Difference]: With dead ends: 54 [2021-05-06 04:59:19,143 INFO L226 Difference]: Without dead ends: 46 [2021-05-06 04:59:19,144 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 62.1ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 04:59:19,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-06 04:59:19,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-05-06 04:59:19,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 30 states have internal predecessors, (31), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 04:59:19,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-05-06 04:59:19,152 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 40 [2021-05-06 04:59:19,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:59:19,152 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-05-06 04:59:19,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-06 04:59:19,152 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-05-06 04:59:19,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-06 04:59:19,153 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:59:19,153 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:59:19,377 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:59:19,377 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:59:19,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:59:19,378 INFO L82 PathProgramCache]: Analyzing trace with hash 380668603, now seen corresponding path program 3 times [2021-05-06 04:59:19,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:59:19,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770975715] [2021-05-06 04:59:19,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:59:19,390 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:59:19,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1429225591] [2021-05-06 04:59:19,390 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 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