/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 03:27:52,352 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 03:27:52,353 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 03:27:52,384 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 03:27:52,395 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 03:27:52,396 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 03:27:52,396 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 03:27:52,397 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 03:27:52,398 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 03:27:52,398 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 03:27:52,399 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 03:27:52,401 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 03:27:52,402 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 03:27:52,402 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 03:27:52,403 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 03:27:52,404 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 03:27:52,406 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 03:27:52,411 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 03:27:52,412 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 03:27:52,412 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 03:27:52,413 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 03:27:52,428 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 03:27:52,429 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 03:27:52,429 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 03:27:52,430 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 03:27:52,430 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 03:27:52,430 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 03:27:52,430 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 03:27:52,430 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 03:27:52,430 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 03:27:52,430 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 03:27:52,431 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 03:27:52,431 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 03:27:52,431 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 03:27:52,431 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 03:27:52,431 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 03:27:52,431 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 03:27:52,431 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 03:27:52,431 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 03:27:52,432 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 03:27:52,432 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 03:27:52,432 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 03:27:52,432 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 03:27:52,432 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 03:27:52,432 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 03:27:52,432 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 03:27:52,433 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 03:27:52,433 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 03:27:52,433 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 03:27:52,433 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 03:27:52,653 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 03:27:52,675 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 03:27:52,677 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 03:27:52,678 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 03:27:52,679 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 03:27:52,679 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound2.c [2021-05-06 03:27:52,728 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d55b0a08/27e2759ce27e4343b5adc28b690b78cd/FLAGb739b4643 [2021-05-06 03:27:53,074 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 03:27:53,075 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound2.c [2021-05-06 03:27:53,080 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d55b0a08/27e2759ce27e4343b5adc28b690b78cd/FLAGb739b4643 [2021-05-06 03:27:53,093 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d55b0a08/27e2759ce27e4343b5adc28b690b78cd [2021-05-06 03:27:53,095 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 03:27:53,096 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 03:27:53,099 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 03:27:53,099 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 03:27:53,101 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 03:27:53,102 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 03:27:53" (1/1) ... [2021-05-06 03:27:53,102 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@789672c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:27:53, skipping insertion in model container [2021-05-06 03:27:53,103 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 03:27:53" (1/1) ... [2021-05-06 03:27:53,107 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 03:27:53,120 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 03:27:53,209 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound2.c[545,558] [2021-05-06 03:27:53,221 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 03:27:53,229 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 03:27:53,243 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound2.c[545,558] [2021-05-06 03:27:53,262 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 03:27:53,271 INFO L208 MainTranslator]: Completed translation [2021-05-06 03:27:53,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:27:53 WrapperNode [2021-05-06 03:27:53,271 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 03:27:53,272 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 03:27:53,272 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 03:27:53,272 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 03:27:53,304 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:27:53" (1/1) ... [2021-05-06 03:27:53,304 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:27:53" (1/1) ... [2021-05-06 03:27:53,317 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:27:53" (1/1) ... [2021-05-06 03:27:53,317 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:27:53" (1/1) ... [2021-05-06 03:27:53,327 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:27:53" (1/1) ... [2021-05-06 03:27:53,330 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:27:53" (1/1) ... [2021-05-06 03:27:53,330 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:27:53" (1/1) ... [2021-05-06 03:27:53,331 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 03:27:53,332 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 03:27:53,332 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 03:27:53,332 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 03:27:53,333 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:27:53" (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 03:27:53,376 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 03:27:53,376 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 03:27:53,376 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 03:27:53,376 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 03:27:53,376 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 03:27:53,376 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 03:27:53,377 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 03:27:53,377 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 03:27:53,377 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 03:27:53,377 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 03:27:53,377 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 03:27:53,378 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 03:27:53,378 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 03:27:53,378 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 03:27:53,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 03:27:53,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 03:27:53,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 03:27:53,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 03:27:53,380 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 03:27:53,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 03:27:53,633 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 03:27:53,633 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 03:27:53,634 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 03:27:53 BoogieIcfgContainer [2021-05-06 03:27:53,634 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 03:27:53,635 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 03:27:53,635 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 03:27:53,637 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 03:27:53,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 03:27:53" (1/3) ... [2021-05-06 03:27:53,638 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a74561 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 03:27:53, skipping insertion in model container [2021-05-06 03:27:53,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:27:53" (2/3) ... [2021-05-06 03:27:53,638 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a74561 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 03:27:53, skipping insertion in model container [2021-05-06 03:27:53,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 03:27:53" (3/3) ... [2021-05-06 03:27:53,639 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_valuebound2.c [2021-05-06 03:27:53,642 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 03:27:53,644 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 03:27:53,655 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 03:27:53,669 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 03:27:53,669 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 03:27:53,669 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 03:27:53,669 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 03:27:53,669 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 03:27:53,669 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 03:27:53,670 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 03:27:53,670 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 03:27:53,680 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 03:27:53,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 03:27:53,684 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:27:53,684 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:27:53,684 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:27:53,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:27:53,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1784424332, now seen corresponding path program 1 times [2021-05-06 03:27:53,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:27:53,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708346338] [2021-05-06 03:27:53,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:27:53,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:27:53,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:27:53,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:27:53,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:27:53,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:27:53,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 03:27:53,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:27:53,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 03:27:53,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:27:53,899 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 03:27:53,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:27:53,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708346338] [2021-05-06 03:27:53,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708346338] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:27:53,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:27:53,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 03:27:53,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724102373] [2021-05-06 03:27:53,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 03:27:53,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:27:53,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 03:27:53,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 03:27:53,919 INFO L87 Difference]: Start difference. First operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 03:27:54,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:27:54,032 INFO L93 Difference]: Finished difference Result 69 states and 110 transitions. [2021-05-06 03:27:54,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 03:27:54,033 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-06 03:27:54,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:27:54,038 INFO L225 Difference]: With dead ends: 69 [2021-05-06 03:27:54,038 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 03:27:54,040 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 50.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 03:27:54,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 03:27:54,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-06 03:27:54,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 03:27:54,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-05-06 03:27:54,088 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2021-05-06 03:27:54,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:27:54,088 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-05-06 03:27:54,089 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 03:27:54,089 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-05-06 03:27:54,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 03:27:54,090 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:27:54,090 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:27:54,090 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 03:27:54,090 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:27:54,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:27:54,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1361835634, now seen corresponding path program 1 times [2021-05-06 03:27:54,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:27:54,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567954875] [2021-05-06 03:27:54,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:27:54,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:27:54,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:27:54,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:27:54,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:27:54,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:27:54,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 03:27:54,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:27:54,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 03:27:54,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:27:54,239 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 03:27:54,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:27:54,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567954875] [2021-05-06 03:27:54,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567954875] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:27:54,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:27:54,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 03:27:54,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460631660] [2021-05-06 03:27:54,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:27:54,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:27:54,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:27:54,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:27:54,241 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 03:27:54,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:27:54,474 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2021-05-06 03:27:54,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 03:27:54,474 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2021-05-06 03:27:54,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:27:54,475 INFO L225 Difference]: With dead ends: 46 [2021-05-06 03:27:54,475 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 03:27:54,476 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 113.3ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:27:54,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 03:27:54,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-05-06 03:27:54,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 03:27:54,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-06 03:27:54,483 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2021-05-06 03:27:54,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:27:54,483 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-06 03:27:54,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 03:27:54,483 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-06 03:27:54,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 03:27:54,484 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:27:54,484 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:27:54,484 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 03:27:54,484 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:27:54,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:27:54,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1382067636, now seen corresponding path program 1 times [2021-05-06 03:27:54,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:27:54,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601066421] [2021-05-06 03:27:54,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:27:54,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:27:54,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:27:54,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:27:54,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:27:54,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:27:54,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 03:27:54,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:27:54,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 03:27:54,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:27:54,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-06 03:27:54,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:27:54,641 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 03:27:54,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:27:54,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601066421] [2021-05-06 03:27:54,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601066421] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:27:54,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:27:54,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 03:27:54,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547331160] [2021-05-06 03:27:54,642 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:27:54,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:27:54,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:27:54,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:27:54,643 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 03:27:54,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:27:54,862 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2021-05-06 03:27:54,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 03:27:54,862 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-06 03:27:54,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:27:54,864 INFO L225 Difference]: With dead ends: 50 [2021-05-06 03:27:54,864 INFO L226 Difference]: Without dead ends: 48 [2021-05-06 03:27:54,865 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 130.1ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:27:54,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-06 03:27:54,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2021-05-06 03:27:54,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 03:27:54,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-05-06 03:27:54,883 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2021-05-06 03:27:54,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:27:54,883 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-05-06 03:27:54,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 03:27:54,884 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-05-06 03:27:54,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 03:27:54,885 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:27:54,885 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-06 03:27:54,885 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 03:27:54,885 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:27:54,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:27:54,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1455208590, now seen corresponding path program 1 times [2021-05-06 03:27:54,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:27:54,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207680675] [2021-05-06 03:27:54,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:27:54,904 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:27:54,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1288674105] [2021-05-06 03:27:54,905 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 03:27:55,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:27:55,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 03:27:55,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:27:55,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:27:55,119 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 03:27:55,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:27:55,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207680675] [2021-05-06 03:27:55,119 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:27:55,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288674105] [2021-05-06 03:27:55,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288674105] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:27:55,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:27:55,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 03:27:55,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116543174] [2021-05-06 03:27:55,120 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 03:27:55,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:27:55,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 03:27:55,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 03:27:55,120 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 03:27:57,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:27:57,358 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2021-05-06 03:27:57,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 03:27:57,359 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2021-05-06 03:27:57,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:27:57,360 INFO L225 Difference]: With dead ends: 58 [2021-05-06 03:27:57,360 INFO L226 Difference]: Without dead ends: 55 [2021-05-06 03:27:57,360 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.1ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:27:57,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-06 03:27:57,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-05-06 03:27:57,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.2) internal successors, (36), 32 states have internal predecessors, (36), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 03:27:57,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2021-05-06 03:27:57,370 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 69 transitions. Word has length 38 [2021-05-06 03:27:57,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:27:57,370 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 69 transitions. [2021-05-06 03:27:57,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 03:27:57,370 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 69 transitions. [2021-05-06 03:27:57,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-06 03:27:57,371 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:27:57,371 INFO L523 BasicCegarLoop]: trace histogram [4, 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, 1, 1] [2021-05-06 03:27:57,592 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:27:57,593 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:27:57,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:27:57,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1688067263, now seen corresponding path program 1 times [2021-05-06 03:27:57,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:27:57,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425483576] [2021-05-06 03:27:57,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:27:57,601 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:27:57,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [15701272] [2021-05-06 03:27:57,602 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 03:27:57,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:27:57,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 03:27:57,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:27:57,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:27:57,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:27:57,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:27:57,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:27:57,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:27:57,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:27:57,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:27:57,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:27:57,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:27:57,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:27:57,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:27:57,970 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-05-06 03:27:57,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:27:57,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425483576] [2021-05-06 03:27:57,970 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:27:57,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15701272] [2021-05-06 03:27:57,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15701272] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:27:57,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:27:57,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 03:27:57,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522096007] [2021-05-06 03:27:57,971 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 03:27:57,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:27:57,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 03:27:57,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 03:27:57,972 INFO L87 Difference]: Start difference. First operand 55 states and 69 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, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 03:27:58,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:27:58,277 INFO L93 Difference]: Finished difference Result 76 states and 92 transitions. [2021-05-06 03:27:58,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 03:27:58,277 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, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2021-05-06 03:27:58,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:27:58,279 INFO L225 Difference]: With dead ends: 76 [2021-05-06 03:27:58,279 INFO L226 Difference]: Without dead ends: 73 [2021-05-06 03:27:58,280 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 104.8ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 03:27:58,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-06 03:27:58,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2021-05-06 03:27:58,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 44 states have internal predecessors, (49), 20 states have call successors, (20), 10 states have call predecessors, (20), 9 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 03:27:58,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 87 transitions. [2021-05-06 03:27:58,288 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 87 transitions. Word has length 45 [2021-05-06 03:27:58,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:27:58,288 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 87 transitions. [2021-05-06 03:27:58,288 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, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 03:27:58,289 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 87 transitions. [2021-05-06 03:27:58,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-06 03:27:58,289 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:27:58,289 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 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 03:27:58,497 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:27:58,497 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:27:58,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:27:58,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1471734606, now seen corresponding path program 1 times [2021-05-06 03:27:58,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:27:58,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269571024] [2021-05-06 03:27:58,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:27:58,506 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:27:58,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2026237127] [2021-05-06 03:27:58,506 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 [2021-05-06 03:27:58,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:27:58,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 03:27:58,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:27:58,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:27:58,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:27:58,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:27:58,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:27:58,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:27:58,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:27:58,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:27:58,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:27:58,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:27:58,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:27:58,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:27:58,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:27:58,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:27:58,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:27:58,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:27:58,963 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-05-06 03:27:58,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:27:58,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269571024] [2021-05-06 03:27:58,964 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:27:58,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026237127] [2021-05-06 03:27:58,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026237127] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:27:58,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:27:58,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 03:27:58,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980542642] [2021-05-06 03:27:58,965 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 03:27:58,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:27:58,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 03:27:58,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:27:58,966 INFO L87 Difference]: Start difference. First operand 72 states and 87 transitions. Second operand has 10 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), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 03:28:03,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:28:03,673 INFO L93 Difference]: Finished difference Result 99 states and 125 transitions. [2021-05-06 03:28:03,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 03:28:03,673 INFO L78 Accepts]: Start accepts. Automaton has has 10 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), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 55 [2021-05-06 03:28:03,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:28:03,675 INFO L225 Difference]: With dead ends: 99 [2021-05-06 03:28:03,675 INFO L226 Difference]: Without dead ends: 91 [2021-05-06 03:28:03,676 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 111.2ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 03:28:03,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-05-06 03:28:03,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 85. [2021-05-06 03:28:03,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 49 states have (on average 1.163265306122449) internal successors, (57), 51 states have internal predecessors, (57), 25 states have call successors, (25), 11 states have call predecessors, (25), 10 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-06 03:28:03,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 105 transitions. [2021-05-06 03:28:03,690 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 105 transitions. Word has length 55 [2021-05-06 03:28:03,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:28:03,690 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 105 transitions. [2021-05-06 03:28:03,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 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), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 03:28:03,690 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 105 transitions. [2021-05-06 03:28:03,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-06 03:28:03,692 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:28:03,692 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 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, 1, 1] [2021-05-06 03:28:03,897 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:28:03,897 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:28:03,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:28:03,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1586192473, now seen corresponding path program 1 times [2021-05-06 03:28:03,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:28:03,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235184026] [2021-05-06 03:28:03,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:28:03,905 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:28:03,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [428244396] [2021-05-06 03:28:03,906 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