/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_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 03:27:53,237 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 03:27:53,238 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 03:27:53,273 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 03:27:53,290 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 03:27:53,291 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 03:27:53,292 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 03:27:53,293 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 03:27:53,296 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 03:27:53,297 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 03:27:53,299 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 03:27:53,301 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 03:27:53,301 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 03:27:53,302 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 03:27:53,303 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 03:27:53,303 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 03:27:53,305 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 03:27:53,309 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 03:27:53,310 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 03:27:53,310 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 03:27:53,311 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 03:27:53,325 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 03:27:53,325 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 03:27:53,341 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 03:27:53,341 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 03:27:53,341 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 03:27:53,342 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 03:27:53,342 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 03:27:53,342 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 03:27:53,342 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 03:27:53,342 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 03:27:53,342 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 03:27:53,342 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 03:27:53,342 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 03:27:53,343 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 03:27:53,343 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 03:27:53,343 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 03:27:53,343 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 03:27:53,343 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 03:27:53,343 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 03:27:53,343 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 03:27:53,343 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 03:27:53,343 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 03:27:53,344 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 03:27:53,344 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 03:27:53,344 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 03:27:53,344 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 03:27:53,344 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 03:27:53,344 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 03:27:53,344 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 03:27:53,582 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 03:27:53,601 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 03:27:53,603 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 03:27:53,604 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 03:27:53,620 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 03:27:53,621 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound20.c [2021-05-06 03:27:53,679 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1778a464c/e2d97ee397044485a356a382b06f0714/FLAGe6ba47bae [2021-05-06 03:27:53,963 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 03:27:53,964 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound20.c [2021-05-06 03:27:53,970 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1778a464c/e2d97ee397044485a356a382b06f0714/FLAGe6ba47bae [2021-05-06 03:27:54,403 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1778a464c/e2d97ee397044485a356a382b06f0714 [2021-05-06 03:27:54,408 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 03:27:54,410 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 03:27:54,415 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 03:27:54,415 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 03:27:54,417 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 03:27:54,418 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 03:27:54" (1/1) ... [2021-05-06 03:27:54,420 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a503efa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:27:54, skipping insertion in model container [2021-05-06 03:27:54,420 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 03:27:54" (1/1) ... [2021-05-06 03:27:54,425 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 03:27:54,438 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 03:27:54,531 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_valuebound20.c[545,558] [2021-05-06 03:27:54,545 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 03:27:54,550 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 03:27:54,560 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_valuebound20.c[545,558] [2021-05-06 03:27:54,568 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 03:27:54,577 INFO L208 MainTranslator]: Completed translation [2021-05-06 03:27:54,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:27:54 WrapperNode [2021-05-06 03:27:54,578 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 03:27:54,579 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 03:27:54,579 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 03:27:54,579 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 03:27:54,586 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:27:54" (1/1) ... [2021-05-06 03:27:54,586 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:27:54" (1/1) ... [2021-05-06 03:27:54,591 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:27:54" (1/1) ... [2021-05-06 03:27:54,591 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:27:54" (1/1) ... [2021-05-06 03:27:54,594 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:27:54" (1/1) ... [2021-05-06 03:27:54,597 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:27:54" (1/1) ... [2021-05-06 03:27:54,598 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:27:54" (1/1) ... [2021-05-06 03:27:54,599 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 03:27:54,600 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 03:27:54,600 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 03:27:54,600 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 03:27:54,611 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:27:54" (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 03:27:54,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 03:27:54,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 03:27:54,717 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 03:27:54,717 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 03:27:54,718 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 03:27:54,718 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 03:27:54,718 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 03:27:54,718 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 03:27:54,719 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 03:27:54,719 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 03:27:54,719 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 03:27:54,719 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 03:27:54,720 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 03:27:54,720 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 03:27:54,720 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 03:27:54,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 03:27:54,720 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 03:27:54,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 03:27:54,720 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 03:27:54,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 03:27:54,982 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 03:27:54,983 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 03:27:54,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 03:27:54 BoogieIcfgContainer [2021-05-06 03:27:54,984 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 03:27:55,001 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 03:27:55,002 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 03:27:55,004 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 03:27:55,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 03:27:54" (1/3) ... [2021-05-06 03:27:55,005 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ad9ceab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 03:27:55, skipping insertion in model container [2021-05-06 03:27:55,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:27:54" (2/3) ... [2021-05-06 03:27:55,005 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ad9ceab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 03:27:55, skipping insertion in model container [2021-05-06 03:27:55,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 03:27:54" (3/3) ... [2021-05-06 03:27:55,006 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_valuebound20.c [2021-05-06 03:27:55,010 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 03:27:55,012 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 03:27:55,040 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 03:27:55,080 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 03:27:55,080 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 03:27:55,080 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 03:27:55,080 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 03:27:55,080 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 03:27:55,080 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 03:27:55,080 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 03:27:55,080 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 03:27:55,108 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 03:27:55,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 03:27:55,112 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:27:55,112 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 03:27:55,112 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:27:55,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:27:55,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1784424332, now seen corresponding path program 1 times [2021-05-06 03:27:55,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:27:55,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977542487] [2021-05-06 03:27:55,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:27:55,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:27:55,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:27:55,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:27:55,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:27:55,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:27:55,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 03:27:55,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:27:55,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 03:27:55,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:27:55,352 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 03:27:55,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:27:55,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977542487] [2021-05-06 03:27:55,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977542487] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:27:55,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:27:55,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 03:27:55,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204417104] [2021-05-06 03:27:55,357 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 03:27:55,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:27:55,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 03:27:55,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 03:27:55,367 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 03:27:55,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:27:55,492 INFO L93 Difference]: Finished difference Result 69 states and 110 transitions. [2021-05-06 03:27:55,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 03:27:55,510 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 03:27:55,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:27:55,517 INFO L225 Difference]: With dead ends: 69 [2021-05-06 03:27:55,517 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 03:27:55,524 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 03:27:55,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 03:27:55,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-06 03:27:55,550 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 03:27:55,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-05-06 03:27:55,552 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2021-05-06 03:27:55,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:27:55,553 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-05-06 03:27:55,553 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 03:27:55,553 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-05-06 03:27:55,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 03:27:55,554 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:27:55,554 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 03:27:55,555 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 03:27:55,555 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:27:55,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:27:55,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1361835634, now seen corresponding path program 1 times [2021-05-06 03:27:55,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:27:55,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255438301] [2021-05-06 03:27:55,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:27:55,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:27:55,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:27:55,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:27:55,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:27:55,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:27:55,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 03:27:55,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:27:55,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 03:27:55,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:27:55,676 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 03:27:55,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:27:55,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255438301] [2021-05-06 03:27:55,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255438301] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:27:55,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:27:55,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 03:27:55,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159433477] [2021-05-06 03:27:55,678 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:27:55,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:27:55,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:27:55,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:27:55,679 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 03:27:56,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:27:56,013 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2021-05-06 03:27:56,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 03:27:56,014 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 03:27:56,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:27:56,016 INFO L225 Difference]: With dead ends: 46 [2021-05-06 03:27:56,016 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 03:27:56,018 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 118.3ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:27:56,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 03:27:56,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-05-06 03:27:56,025 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 03:27:56,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-06 03:27:56,026 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2021-05-06 03:27:56,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:27:56,026 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-06 03:27:56,026 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 03:27:56,026 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-06 03:27:56,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 03:27:56,027 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:27:56,027 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 03:27:56,027 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 03:27:56,027 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:27:56,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:27:56,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1382067636, now seen corresponding path program 1 times [2021-05-06 03:27:56,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:27:56,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815722440] [2021-05-06 03:27:56,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:27:56,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:27:56,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:27:56,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:27:56,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:27:56,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:27:56,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 03:27:56,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:27:56,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 03:27:56,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:27:56,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-06 03:27:56,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:27:56,277 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 03:27:56,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:27:56,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815722440] [2021-05-06 03:27:56,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815722440] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:27:56,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:27:56,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 03:27:56,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272449030] [2021-05-06 03:27:56,278 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:27:56,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:27:56,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:27:56,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:27:56,279 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 03:27:56,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:27:56,514 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2021-05-06 03:27:56,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 03:27:56,515 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 03:27:56,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:27:56,516 INFO L225 Difference]: With dead ends: 50 [2021-05-06 03:27:56,516 INFO L226 Difference]: Without dead ends: 48 [2021-05-06 03:27:56,517 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 141.4ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:27:56,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-06 03:27:56,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2021-05-06 03:27:56,530 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 03:27:56,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-05-06 03:27:56,535 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2021-05-06 03:27:56,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:27:56,535 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-05-06 03:27:56,535 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 03:27:56,535 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-05-06 03:27:56,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 03:27:56,537 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:27:56,537 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 03:27:56,537 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 03:27:56,538 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:27:56,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:27:56,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1455208590, now seen corresponding path program 1 times [2021-05-06 03:27:56,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:27:56,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803591326] [2021-05-06 03:27:56,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:27:56,561 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:27:56,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [675761924] [2021-05-06 03:27:56,561 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 03:27:56,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:27:56,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 03:27:56,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:27:56,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:27:56,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:27:56,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:27:56,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:27:56,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:27:56,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:27:56,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:27:56,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:27:56,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:27:56,882 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-05-06 03:27:56,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:27:56,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803591326] [2021-05-06 03:27:56,882 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:27:56,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675761924] [2021-05-06 03:27:56,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675761924] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:27:56,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:27:56,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 03:27:56,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100564401] [2021-05-06 03:27:56,883 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 03:27:56,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:27:56,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 03:27:56,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 03:27:56,884 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 03:27:59,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:27:59,201 INFO L93 Difference]: Finished difference Result 64 states and 83 transitions. [2021-05-06 03:27:59,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 03:27:59,202 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 38 [2021-05-06 03:27:59,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:27:59,202 INFO L225 Difference]: With dead ends: 64 [2021-05-06 03:27:59,203 INFO L226 Difference]: Without dead ends: 61 [2021-05-06 03:27:59,203 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 70.2ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:27:59,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-06 03:27:59,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 55. [2021-05-06 03:27:59,210 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 03:27:59,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2021-05-06 03:27:59,210 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 69 transitions. Word has length 38 [2021-05-06 03:27:59,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:27:59,211 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 69 transitions. [2021-05-06 03:27:59,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 03:27:59,211 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 69 transitions. [2021-05-06 03:27:59,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-06 03:27:59,212 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:27:59,212 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 03:27:59,429 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:27:59,429 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:27:59,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:27:59,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1688067263, now seen corresponding path program 1 times [2021-05-06 03:27:59,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:27:59,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133609229] [2021-05-06 03:27:59,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:27:59,439 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:27:59,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [271070118] [2021-05-06 03:27:59,439 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 03:27:59,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:27:59,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 03:27:59,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:27:59,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:27:59,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:27:59,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:27:59,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:27:59,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:27:59,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:27:59,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:27:59,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:27:59,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:27:59,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:27:59,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:27:59,735 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 03:27:59,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:27:59,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133609229] [2021-05-06 03:27:59,735 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:27:59,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271070118] [2021-05-06 03:27:59,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271070118] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:27:59,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:27:59,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 03:27:59,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417882686] [2021-05-06 03:27:59,736 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 03:27:59,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:27:59,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 03:27:59,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 03:27:59,741 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 03:28:00,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:28:00,006 INFO L93 Difference]: Finished difference Result 76 states and 92 transitions. [2021-05-06 03:28:00,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 03:28:00,007 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 03:28:00,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:28:00,008 INFO L225 Difference]: With dead ends: 76 [2021-05-06 03:28:00,008 INFO L226 Difference]: Without dead ends: 73 [2021-05-06 03:28:00,009 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 105.7ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 03:28:00,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-06 03:28:00,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2021-05-06 03:28:00,017 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 03:28:00,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 87 transitions. [2021-05-06 03:28:00,018 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 87 transitions. Word has length 45 [2021-05-06 03:28:00,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:28:00,018 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 87 transitions. [2021-05-06 03:28:00,018 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 03:28:00,018 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 87 transitions. [2021-05-06 03:28:00,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-06 03:28:00,019 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:28:00,019 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 03:28:00,225 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:28:00,225 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:28:00,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:28:00,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1471734606, now seen corresponding path program 1 times [2021-05-06 03:28:00,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:28:00,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378427759] [2021-05-06 03:28:00,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:28:00,245 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:28:00,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1534779060] [2021-05-06 03:28:00,245 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 03:28:00,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:28:00,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 03:28:00,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:28:00,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:28:00,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:28:00,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:28:00,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:28:00,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:28:00,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:28:00,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:28:00,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:28:00,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:28:00,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:28:00,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:28:00,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:28:00,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:28:00,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:28:00,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:28:00,662 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 03:28:00,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:28:00,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378427759] [2021-05-06 03:28:00,663 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:28:00,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534779060] [2021-05-06 03:28:00,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534779060] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:28:00,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:28:00,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 03:28:00,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810500026] [2021-05-06 03:28:00,664 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 03:28:00,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:28:00,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 03:28:00,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:28:00,665 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 03:28:05,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:28:05,235 INFO L93 Difference]: Finished difference Result 99 states and 125 transitions. [2021-05-06 03:28:05,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 03:28:05,236 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 03:28:05,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:28:05,238 INFO L225 Difference]: With dead ends: 99 [2021-05-06 03:28:05,238 INFO L226 Difference]: Without dead ends: 91 [2021-05-06 03:28:05,238 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 93.1ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 03:28:05,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-05-06 03:28:05,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 85. [2021-05-06 03:28:05,247 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 03:28:05,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 105 transitions. [2021-05-06 03:28:05,248 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 105 transitions. Word has length 55 [2021-05-06 03:28:05,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:28:05,248 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 105 transitions. [2021-05-06 03:28:05,248 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 03:28:05,248 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 105 transitions. [2021-05-06 03:28:05,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-06 03:28:05,249 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:28:05,249 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 03:28:05,454 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:28:05,454 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:28:05,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:28:05,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1586192473, now seen corresponding path program 1 times [2021-05-06 03:28:05,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:28:05,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370101581] [2021-05-06 03:28:05,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:28:05,462 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:28:05,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1359266595] [2021-05-06 03:28:05,463 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