/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/prodbin-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 16:29:06,747 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 16:29:06,748 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 16:29:06,779 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 16:29:06,788 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 16:29:06,789 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 16:29:06,790 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 16:29:06,791 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 16:29:06,792 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 16:29:06,792 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 16:29:06,794 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 16:29:06,795 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 16:29:06,796 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 16:29:06,797 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 16:29:06,798 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 16:29:06,799 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 16:29:06,801 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 16:29:06,807 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 16:29:06,808 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 16:29:06,809 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 16:29:06,810 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 16:29:06,831 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 16:29:06,831 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 16:29:06,832 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 16:29:06,832 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 16:29:06,833 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 16:29:06,833 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 16:29:06,833 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 16:29:06,833 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 16:29:06,834 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 16:29:06,834 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 16:29:06,834 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 16:29:06,834 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 16:29:06,834 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 16:29:06,835 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 16:29:06,835 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 16:29:06,835 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 16:29:06,835 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 16:29:06,835 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 16:29:06,836 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 16:29:06,836 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 16:29:06,836 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 16:29:06,840 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 16:29:06,841 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 16:29:06,841 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 16:29:06,841 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 16:29:06,841 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 16:29:06,842 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 16:29:06,842 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 16:29:06,842 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 16:29:07,202 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 16:29:07,229 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 16:29:07,231 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 16:29:07,232 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 16:29:07,233 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 16:29:07,233 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound5.c [2021-05-02 16:29:07,297 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1069322da/ed745230dc6046998affd336c5e0ddd8/FLAG55eb3c185 [2021-05-02 16:29:07,933 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 16:29:07,933 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound5.c [2021-05-02 16:29:07,939 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1069322da/ed745230dc6046998affd336c5e0ddd8/FLAG55eb3c185 [2021-05-02 16:29:08,110 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1069322da/ed745230dc6046998affd336c5e0ddd8 [2021-05-02 16:29:08,112 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 16:29:08,114 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 16:29:08,115 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 16:29:08,116 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 16:29:08,119 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 16:29:08,119 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 04:29:08" (1/1) ... [2021-05-02 16:29:08,123 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f4db689 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:29:08, skipping insertion in model container [2021-05-02 16:29:08,123 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 04:29:08" (1/1) ... [2021-05-02 16:29:08,130 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 16:29:08,141 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 16:29:08,286 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/prodbin-ll_unwindbound5.c[537,550] [2021-05-02 16:29:08,296 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 16:29:08,308 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 16:29:08,343 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/prodbin-ll_unwindbound5.c[537,550] [2021-05-02 16:29:08,359 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 16:29:08,386 INFO L208 MainTranslator]: Completed translation [2021-05-02 16:29:08,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:29:08 WrapperNode [2021-05-02 16:29:08,387 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 16:29:08,388 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 16:29:08,388 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 16:29:08,390 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 16:29:08,398 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:29:08" (1/1) ... [2021-05-02 16:29:08,399 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:29:08" (1/1) ... [2021-05-02 16:29:08,405 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:29:08" (1/1) ... [2021-05-02 16:29:08,405 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:29:08" (1/1) ... [2021-05-02 16:29:08,416 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:29:08" (1/1) ... [2021-05-02 16:29:08,421 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:29:08" (1/1) ... [2021-05-02 16:29:08,425 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:29:08" (1/1) ... [2021-05-02 16:29:08,429 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 16:29:08,430 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 16:29:08,430 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 16:29:08,430 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 16:29:08,431 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:29:08" (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 16:29:08,502 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 16:29:08,503 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 16:29:08,503 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 16:29:08,503 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 16:29:08,503 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 16:29:08,503 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 16:29:08,503 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 16:29:08,504 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 16:29:08,504 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 16:29:08,505 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 16:29:08,505 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 16:29:08,505 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 16:29:08,506 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 16:29:08,506 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 16:29:08,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 16:29:08,507 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 16:29:08,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 16:29:08,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 16:29:08,508 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 16:29:08,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 16:29:08,683 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 16:29:08,684 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 16:29:08,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 04:29:08 BoogieIcfgContainer [2021-05-02 16:29:08,685 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 16:29:08,687 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 16:29:08,687 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 16:29:08,689 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 16:29:08,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 04:29:08" (1/3) ... [2021-05-02 16:29:08,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d70f311 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 04:29:08, skipping insertion in model container [2021-05-02 16:29:08,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:29:08" (2/3) ... [2021-05-02 16:29:08,691 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d70f311 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 04:29:08, skipping insertion in model container [2021-05-02 16:29:08,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 04:29:08" (3/3) ... [2021-05-02 16:29:08,692 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound5.c [2021-05-02 16:29:08,696 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 16:29:08,699 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 16:29:08,713 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 16:29:08,731 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 16:29:08,731 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 16:29:08,731 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 16:29:08,731 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 16:29:08,731 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 16:29:08,731 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 16:29:08,731 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 16:29:08,732 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 16:29:08,744 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 16:29:08,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 16:29:08,748 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:29:08,748 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:29:08,749 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:29:08,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:29:08,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1523633710, now seen corresponding path program 1 times [2021-05-02 16:29:08,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:29:08,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583467686] [2021-05-02 16:29:08,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:29:08,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:29:08,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 16:29:08,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:29:08,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 16:29:08,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:29:08,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:29:08,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:29:08,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583467686] [2021-05-02 16:29:08,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583467686] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 16:29:08,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 16:29:08,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 16:29:08,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67176545] [2021-05-02 16:29:08,942 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 16:29:08,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:29:08,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 16:29:08,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 16:29:08,955 INFO L87 Difference]: Start difference. First operand has 30 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 16:29:09,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:29:09,071 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2021-05-02 16:29:09,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 16:29:09,073 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 16:29:09,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:29:09,079 INFO L225 Difference]: With dead ends: 52 [2021-05-02 16:29:09,079 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 16:29:09,082 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 16:29:09,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 16:29:09,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-05-02 16:29:09,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 16:29:09,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-05-02 16:29:09,108 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2021-05-02 16:29:09,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:29:09,109 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-05-02 16:29:09,109 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 16:29:09,109 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-05-02 16:29:09,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 16:29:09,110 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:29:09,110 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:29:09,110 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 16:29:09,110 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:29:09,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:29:09,111 INFO L82 PathProgramCache]: Analyzing trace with hash -991958694, now seen corresponding path program 1 times [2021-05-02 16:29:09,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:29:09,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031575765] [2021-05-02 16:29:09,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:29:09,137 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:29:09,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1530683770] [2021-05-02 16:29:09,138 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 16:29:09,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:29:09,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 16:29:09,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:29:09,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:09,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:09,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:09,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:09,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:09,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:29:09,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:29:09,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031575765] [2021-05-02 16:29:09,404 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:29:09,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530683770] [2021-05-02 16:29:09,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530683770] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 16:29:09,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 16:29:09,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 16:29:09,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84685125] [2021-05-02 16:29:09,406 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 16:29:09,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:29:09,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 16:29:09,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 16:29:09,407 INFO L87 Difference]: Start difference. First operand 25 states and 28 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 16:29:09,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:29:09,418 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-05-02 16:29:09,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 16:29:09,419 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-05-02 16:29:09,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:29:09,420 INFO L225 Difference]: With dead ends: 34 [2021-05-02 16:29:09,420 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 16:29:09,420 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 16:29:09,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 16:29:09,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-02 16:29:09,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 16:29:09,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-05-02 16:29:09,426 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 18 [2021-05-02 16:29:09,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:29:09,426 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-05-02 16:29:09,426 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 16:29:09,427 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-05-02 16:29:09,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 16:29:09,427 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:29:09,427 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:29:09,640 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 16:29:09,641 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:29:09,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:29:09,642 INFO L82 PathProgramCache]: Analyzing trace with hash -990171234, now seen corresponding path program 1 times [2021-05-02 16:29:09,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:29:09,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670711664] [2021-05-02 16:29:09,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:29:09,662 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:29:09,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2141723214] [2021-05-02 16:29:09,664 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 16:29:09,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:29:09,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 16:29:09,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:29:09,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:09,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:09,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:29:09,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:29:09,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670711664] [2021-05-02 16:29:09,822 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:29:09,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141723214] [2021-05-02 16:29:09,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141723214] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 16:29:09,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 16:29:09,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 16:29:09,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803784908] [2021-05-02 16:29:09,823 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 16:29:09,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:29:09,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 16:29:09,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 16:29:09,824 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 16:29:09,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:29:09,913 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2021-05-02 16:29:09,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 16:29:09,914 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-02 16:29:09,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:29:09,917 INFO L225 Difference]: With dead ends: 42 [2021-05-02 16:29:09,917 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 16:29:09,918 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 52.0ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 16:29:09,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 16:29:09,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2021-05-02 16:29:09,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 16:29:09,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-05-02 16:29:09,939 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 18 [2021-05-02 16:29:09,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:29:09,940 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-05-02 16:29:09,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 16:29:09,940 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-05-02 16:29:09,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 16:29:09,941 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:29:09,942 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:29:10,156 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:29:10,157 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:29:10,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:29:10,158 INFO L82 PathProgramCache]: Analyzing trace with hash 584619061, now seen corresponding path program 1 times [2021-05-02 16:29:10,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:29:10,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178861444] [2021-05-02 16:29:10,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:29:10,184 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:29:10,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1702228850] [2021-05-02 16:29:10,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:29:10,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:29:10,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 16:29:10,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:29:10,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:10,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:10,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:10,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:10,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:10,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:10,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:10,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:10,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:29:10,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:29:10,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178861444] [2021-05-02 16:29:10,348 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:29:10,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702228850] [2021-05-02 16:29:10,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702228850] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:29:10,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:29:10,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 16:29:10,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633481556] [2021-05-02 16:29:10,349 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 16:29:10,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:29:10,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 16:29:10,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 16:29:10,350 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 16:29:10,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:29:10,376 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2021-05-02 16:29:10,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 16:29:10,376 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-02 16:29:10,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:29:10,377 INFO L225 Difference]: With dead ends: 44 [2021-05-02 16:29:10,377 INFO L226 Difference]: Without dead ends: 37 [2021-05-02 16:29:10,377 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.2ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 16:29:10,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-02 16:29:10,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-02 16:29:10,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 27 states have internal predecessors, (31), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 16:29:10,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2021-05-02 16:29:10,383 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 28 [2021-05-02 16:29:10,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:29:10,383 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2021-05-02 16:29:10,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 16:29:10,383 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2021-05-02 16:29:10,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 16:29:10,384 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:29:10,384 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:29:10,604 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:29:10,605 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:29:10,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:29:10,605 INFO L82 PathProgramCache]: Analyzing trace with hash 586406521, now seen corresponding path program 1 times [2021-05-02 16:29:10,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:29:10,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114322953] [2021-05-02 16:29:10,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:29:10,620 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:29:10,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [927650375] [2021-05-02 16:29:10,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:29:10,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:29:10,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 16:29:10,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:29:10,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:10,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:10,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:10,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:10,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:10,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:10,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:10,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:10,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:10,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:10,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:10,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:10,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:10,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:10,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:10,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:10,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:10,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:10,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:10,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:10,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:10,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:10,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:10,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:10,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:10,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:10,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:10,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:10,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:10,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:10,999 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:29:10,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:29:10,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114322953] [2021-05-02 16:29:11,000 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:29:11,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927650375] [2021-05-02 16:29:11,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927650375] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:29:11,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:29:11,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 16:29:11,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068368508] [2021-05-02 16:29:11,002 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 16:29:11,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:29:11,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 16:29:11,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 16:29:11,003 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 16:29:11,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:29:11,118 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2021-05-02 16:29:11,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 16:29:11,119 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2021-05-02 16:29:11,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:29:11,120 INFO L225 Difference]: With dead ends: 55 [2021-05-02 16:29:11,121 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 16:29:11,121 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 93.2ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-02 16:29:11,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 16:29:11,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2021-05-02 16:29:11,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 34 states have internal predecessors, (38), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 16:29:11,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-05-02 16:29:11,128 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 28 [2021-05-02 16:29:11,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:29:11,128 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-05-02 16:29:11,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 16:29:11,129 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-05-02 16:29:11,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 16:29:11,129 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:29:11,129 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:29:11,351 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:29:11,352 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:29:11,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:29:11,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1395753147, now seen corresponding path program 1 times [2021-05-02 16:29:11,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:29:11,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289149469] [2021-05-02 16:29:11,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:29:11,366 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:29:11,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [279910294] [2021-05-02 16:29:11,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:29:11,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:29:11,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 16:29:11,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:29:11,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:11,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:11,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:11,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:11,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:11,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:11,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:11,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:11,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:11,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:11,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:11,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:11,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:11,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:11,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:11,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:11,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:11,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:11,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:11,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:11,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:11,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:11,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:11,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:11,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:11,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:11,844 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:29:11,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:29:11,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289149469] [2021-05-02 16:29:11,844 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:29:11,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279910294] [2021-05-02 16:29:11,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279910294] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:29:11,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:29:11,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 16:29:11,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573529209] [2021-05-02 16:29:11,847 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 16:29:11,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:29:11,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 16:29:11,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-02 16:29:11,848 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 16:29:15,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:29:15,136 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2021-05-02 16:29:15,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 16:29:15,137 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2021-05-02 16:29:15,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:29:15,138 INFO L225 Difference]: With dead ends: 57 [2021-05-02 16:29:15,138 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 16:29:15,138 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 156.0ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-05-02 16:29:15,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 16:29:15,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2021-05-02 16:29:15,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 38 states have internal predecessors, (41), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 16:29:15,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2021-05-02 16:29:15,144 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 28 [2021-05-02 16:29:15,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:29:15,145 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2021-05-02 16:29:15,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 16:29:15,145 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2021-05-02 16:29:15,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 16:29:15,146 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:29:15,146 INFO L523 BasicCegarLoop]: trace histogram [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, 1] [2021-05-02 16:29:15,369 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:29:15,369 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:29:15,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:29:15,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1513703477, now seen corresponding path program 1 times [2021-05-02 16:29:15,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:29:15,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201241248] [2021-05-02 16:29:15,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:29:15,381 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:29:15,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [311062140] [2021-05-02 16:29:15,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:29:15,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:29:15,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 16:29:15,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:29:15,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:15,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:15,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:15,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:15,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:15,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:15,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:15,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:15,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:15,667 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 16:29:15,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:29:15,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201241248] [2021-05-02 16:29:15,667 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:29:15,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311062140] [2021-05-02 16:29:15,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311062140] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:29:15,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:29:15,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 16:29:15,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079221584] [2021-05-02 16:29:15,671 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 16:29:15,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:29:15,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 16:29:15,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-05-02 16:29:15,672 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 16:29:17,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:29:17,905 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2021-05-02 16:29:17,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 16:29:17,906 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2021-05-02 16:29:17,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:29:17,908 INFO L225 Difference]: With dead ends: 59 [2021-05-02 16:29:17,908 INFO L226 Difference]: Without dead ends: 52 [2021-05-02 16:29:17,908 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 240.8ms TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-05-02 16:29:17,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-02 16:29:17,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2021-05-02 16:29:17,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 31 states have internal predecessors, (33), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 16:29:17,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2021-05-02 16:29:17,914 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 34 [2021-05-02 16:29:17,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:29:17,915 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2021-05-02 16:29:17,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 16:29:17,915 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2021-05-02 16:29:17,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 16:29:17,916 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:29:17,916 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:29:18,124 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:29:18,125 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:29:18,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:29:18,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1456887472, now seen corresponding path program 2 times [2021-05-02 16:29:18,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:29:18,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281002456] [2021-05-02 16:29:18,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:29:18,135 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:29:18,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [470194574] [2021-05-02 16:29:18,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:29:18,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 16:29:18,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:29:18,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 16:29:18,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:29:18,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:18,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:18,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:18,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:18,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:18,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:18,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:18,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:18,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:18,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:18,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:18,294 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:29:18,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:29:18,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281002456] [2021-05-02 16:29:18,294 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:29:18,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470194574] [2021-05-02 16:29:18,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470194574] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:29:18,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:29:18,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 16:29:18,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142745695] [2021-05-02 16:29:18,295 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 16:29:18,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:29:18,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 16:29:18,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 16:29:18,297 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 16:29:18,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:29:18,352 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2021-05-02 16:29:18,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 16:29:18,352 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 38 [2021-05-02 16:29:18,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:29:18,353 INFO L225 Difference]: With dead ends: 54 [2021-05-02 16:29:18,353 INFO L226 Difference]: Without dead ends: 47 [2021-05-02 16:29:18,354 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 29.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 16:29:18,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-02 16:29:18,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-05-02 16:29:18,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 35 states have internal predecessors, (39), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 16:29:18,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2021-05-02 16:29:18,360 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 38 [2021-05-02 16:29:18,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:29:18,360 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2021-05-02 16:29:18,360 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 16:29:18,361 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2021-05-02 16:29:18,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 16:29:18,361 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:29:18,361 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:29:18,569 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:29:18,570 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:29:18,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:29:18,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1455100012, now seen corresponding path program 2 times [2021-05-02 16:29:18,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:29:18,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133769209] [2021-05-02 16:29:18,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:29:18,579 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:29:18,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1783068980] [2021-05-02 16:29:18,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:29:18,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 16:29:18,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:29:18,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-02 16:29:18,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:29:18,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:18,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:18,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:18,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:28,341 WARN L205 SmtUtils]: Spent 7.52 s on a formula simplification that was a NOOP. DAG size: 22 [2021-05-02 16:29:42,178 WARN L205 SmtUtils]: Spent 12.85 s on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-05-02 16:29:50,630 WARN L205 SmtUtils]: Spent 8.10 s on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2021-05-02 16:29:50,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:50,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:50,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:50,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:50,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:50,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:50,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:50,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:50,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:50,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:50,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:50,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:50,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:50,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:50,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:50,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:50,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:50,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:50,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:50,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:50,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:50,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:50,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:50,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:50,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:29:50,850 WARN L159 QuantifierPusher]: Ignoring assumption.