/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/lcm1_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 15:46:28,660 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 15:46:28,662 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 15:46:28,695 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 15:46:28,715 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 15:46:28,716 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 15:46:28,717 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 15:46:28,718 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 15:46:28,721 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 15:46:28,721 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 15:46:28,723 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 15:46:28,725 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 15:46:28,726 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 15:46:28,728 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 15:46:28,729 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 15:46:28,730 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 15:46:28,748 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 15:46:28,762 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 15:46:28,763 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 15:46:28,763 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 15:46:28,766 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 15:46:28,796 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 15:46:28,796 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 15:46:28,797 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 15:46:28,797 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 15:46:28,797 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 15:46:28,797 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 15:46:28,797 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 15:46:28,797 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 15:46:28,797 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 15:46:28,798 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 15:46:28,798 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 15:46:28,798 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 15:46:28,798 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 15:46:28,798 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 15:46:28,798 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 15:46:28,798 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 15:46:28,798 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 15:46:28,798 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 15:46:28,798 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 15:46:28,799 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 15:46:28,799 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:46:28,799 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 15:46:28,799 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 15:46:28,799 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 15:46:28,799 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 15:46:28,799 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 15:46:28,799 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 15:46:28,799 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 15:46:28,799 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 15:46:29,043 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 15:46:29,057 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 15:46:29,059 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 15:46:29,060 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 15:46:29,061 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 15:46:29,061 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/lcm1_unwindbound2.c [2021-05-02 15:46:29,102 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b57614e8c/6811679fbdb5428799df135612fdef3a/FLAG5e0bd79cf [2021-05-02 15:46:29,745 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 15:46:29,745 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/lcm1_unwindbound2.c [2021-05-02 15:46:29,750 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b57614e8c/6811679fbdb5428799df135612fdef3a/FLAG5e0bd79cf [2021-05-02 15:46:30,139 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b57614e8c/6811679fbdb5428799df135612fdef3a [2021-05-02 15:46:30,141 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 15:46:30,143 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 15:46:30,146 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 15:46:30,146 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 15:46:30,148 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 15:46:30,149 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:46:30" (1/1) ... [2021-05-02 15:46:30,150 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4dd192cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:46:30, skipping insertion in model container [2021-05-02 15:46:30,150 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:46:30" (1/1) ... [2021-05-02 15:46:30,154 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 15:46:30,166 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 15:46:30,244 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/lcm1_unwindbound2.c[560,573] [2021-05-02 15:46:30,259 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:46:30,265 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 15:46:30,278 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/lcm1_unwindbound2.c[560,573] [2021-05-02 15:46:30,302 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:46:30,311 INFO L208 MainTranslator]: Completed translation [2021-05-02 15:46:30,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:46:30 WrapperNode [2021-05-02 15:46:30,312 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 15:46:30,312 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 15:46:30,312 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 15:46:30,312 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 15:46:30,318 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:46:30" (1/1) ... [2021-05-02 15:46:30,319 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:46:30" (1/1) ... [2021-05-02 15:46:30,323 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:46:30" (1/1) ... [2021-05-02 15:46:30,323 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:46:30" (1/1) ... [2021-05-02 15:46:30,327 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:46:30" (1/1) ... [2021-05-02 15:46:30,330 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:46:30" (1/1) ... [2021-05-02 15:46:30,331 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:46:30" (1/1) ... [2021-05-02 15:46:30,332 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 15:46:30,333 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 15:46:30,333 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 15:46:30,333 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 15:46:30,333 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:46:30" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:46:30,427 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 15:46:30,427 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 15:46:30,427 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 15:46:30,427 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 15:46:30,428 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 15:46:30,428 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 15:46:30,428 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 15:46:30,428 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 15:46:30,428 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 15:46:30,428 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 15:46:30,429 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 15:46:30,429 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 15:46:30,429 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 15:46:30,429 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 15:46:30,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 15:46:30,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 15:46:30,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 15:46:30,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 15:46:30,431 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 15:46:30,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 15:46:30,655 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 15:46:30,656 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-02 15:46:30,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:46:30 BoogieIcfgContainer [2021-05-02 15:46:30,657 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 15:46:30,658 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 15:46:30,658 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 15:46:30,660 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 15:46:30,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 03:46:30" (1/3) ... [2021-05-02 15:46:30,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a0fe056 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:46:30, skipping insertion in model container [2021-05-02 15:46:30,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:46:30" (2/3) ... [2021-05-02 15:46:30,661 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a0fe056 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:46:30, skipping insertion in model container [2021-05-02 15:46:30,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:46:30" (3/3) ... [2021-05-02 15:46:30,662 INFO L111 eAbstractionObserver]: Analyzing ICFG lcm1_unwindbound2.c [2021-05-02 15:46:30,666 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 15:46:30,668 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 15:46:30,678 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 15:46:30,692 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 15:46:30,692 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 15:46:30,692 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 15:46:30,692 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 15:46:30,693 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 15:46:30,693 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 15:46:30,693 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 15:46:30,693 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 15:46:30,703 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 15:46:30,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 15:46:30,706 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:46:30,706 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:46:30,707 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:46:30,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:46:30,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1515787587, now seen corresponding path program 1 times [2021-05-02 15:46:30,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:46:30,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737282174] [2021-05-02 15:46:30,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:46:30,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:46:30,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:46:30,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:46:30,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:46:30,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:46:30,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 15:46:30,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:46:30,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-05-02 15:46:30,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:46:30,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-02 15:46:30,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:46:30,921 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 15:46:30,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:46:30,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737282174] [2021-05-02 15:46:30,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737282174] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:46:30,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:46:30,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 15:46:30,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764607258] [2021-05-02 15:46:30,926 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 15:46:30,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:46:30,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 15:46:30,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:46:30,935 INFO L87 Difference]: Start difference. First operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:46:31,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:46:31,052 INFO L93 Difference]: Finished difference Result 74 states and 117 transitions. [2021-05-02 15:46:31,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 15:46:31,054 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2021-05-02 15:46:31,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:46:31,059 INFO L225 Difference]: With dead ends: 74 [2021-05-02 15:46:31,059 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 15:46:31,061 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:46:31,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 15:46:31,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-05-02 15:46:31,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 15:46:31,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 47 transitions. [2021-05-02 15:46:31,086 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 47 transitions. Word has length 32 [2021-05-02 15:46:31,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:46:31,086 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 47 transitions. [2021-05-02 15:46:31,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:46:31,086 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 47 transitions. [2021-05-02 15:46:31,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 15:46:31,087 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:46:31,088 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:46:31,088 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 15:46:31,088 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:46:31,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:46:31,089 INFO L82 PathProgramCache]: Analyzing trace with hash 182383832, now seen corresponding path program 1 times [2021-05-02 15:46:31,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:46:31,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75321313] [2021-05-02 15:46:31,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:46:31,106 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:46:31,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1949370578] [2021-05-02 15:46:31,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:46:31,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:46:31,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 15:46:31,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:46:31,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:46:31,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:46:31,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:46:31,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:46:31,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:46:31,332 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 15:46:31,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:46:31,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75321313] [2021-05-02 15:46:31,333 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:46:31,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949370578] [2021-05-02 15:46:31,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949370578] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:46:31,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:46:31,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 15:46:31,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216124195] [2021-05-02 15:46:31,334 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 15:46:31,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:46:31,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 15:46:31,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 15:46:31,335 INFO L87 Difference]: Start difference. First operand 35 states and 47 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:46:31,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:46:31,350 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2021-05-02 15:46:31,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 15:46:31,350 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 15:46:31,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:46:31,351 INFO L225 Difference]: With dead ends: 45 [2021-05-02 15:46:31,351 INFO L226 Difference]: Without dead ends: 37 [2021-05-02 15:46:31,352 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 15:46:31,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-02 15:46:31,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-02 15:46:31,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 15:46:31,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 49 transitions. [2021-05-02 15:46:31,358 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 49 transitions. Word has length 33 [2021-05-02 15:46:31,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:46:31,359 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 49 transitions. [2021-05-02 15:46:31,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:46:31,359 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 49 transitions. [2021-05-02 15:46:31,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 15:46:31,360 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:46:31,360 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:46:31,573 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 15:46:31,573 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:46:31,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:46:31,574 INFO L82 PathProgramCache]: Analyzing trace with hash 184052128, now seen corresponding path program 1 times [2021-05-02 15:46:31,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:46:31,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233515584] [2021-05-02 15:46:31,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:46:31,586 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:46:31,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [525618411] [2021-05-02 15:46:31,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:46:31,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:46:31,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 15:46:31,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:46:31,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:46:31,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:46:31,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:46:31,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:46:31,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:46:31,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:46:31,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:46:31,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:46:31,860 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 15:46:31,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:46:31,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233515584] [2021-05-02 15:46:31,860 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:46:31,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525618411] [2021-05-02 15:46:31,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525618411] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:46:31,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:46:31,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 15:46:31,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860846979] [2021-05-02 15:46:31,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:46:31,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:46:31,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:46:31,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:46:31,863 INFO L87 Difference]: Start difference. First operand 37 states and 49 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:46:32,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:46:32,419 INFO L93 Difference]: Finished difference Result 57 states and 78 transitions. [2021-05-02 15:46:32,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:46:32,420 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 15:46:32,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:46:32,421 INFO L225 Difference]: With dead ends: 57 [2021-05-02 15:46:32,421 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 15:46:32,421 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 65.5ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:46:32,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 15:46:32,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2021-05-02 15:46:32,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 35 states have internal predecessors, (47), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 15:46:32,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 73 transitions. [2021-05-02 15:46:32,429 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 73 transitions. Word has length 33 [2021-05-02 15:46:32,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:46:32,430 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 73 transitions. [2021-05-02 15:46:32,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:46:32,430 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 73 transitions. [2021-05-02 15:46:32,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 15:46:32,431 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:46:32,431 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:46:32,648 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:46:32,649 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:46:32,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:46:32,650 INFO L82 PathProgramCache]: Analyzing trace with hash 758334593, now seen corresponding path program 1 times [2021-05-02 15:46:32,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:46:32,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349709474] [2021-05-02 15:46:32,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:46:32,671 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:46:32,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [659642373] [2021-05-02 15:46:32,671 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