/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/egcd-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 14:44:01,840 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 14:44:01,841 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 14:44:01,858 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 14:44:01,864 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 14:44:01,865 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 14:44:01,866 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 14:44:01,866 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 14:44:01,867 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 14:44:01,867 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 14:44:01,868 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 14:44:01,869 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 14:44:01,879 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 14:44:01,881 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 14:44:01,881 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 14:44:01,882 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 14:44:01,883 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 14:44:01,888 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 14:44:01,889 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 14:44:01,889 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 14:44:01,895 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 14:44:01,913 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 14:44:01,913 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 14:44:01,914 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 14:44:01,914 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 14:44:01,914 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 14:44:01,914 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 14:44:01,914 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 14:44:01,914 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 14:44:01,914 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 14:44:01,915 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 14:44:01,915 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 14:44:01,915 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 14:44:01,915 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 14:44:01,915 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 14:44:01,915 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 14:44:01,915 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 14:44:01,915 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 14:44:01,915 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 14:44:01,916 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 14:44:01,916 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 14:44:01,916 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 14:44:01,916 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 14:44:01,916 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 14:44:01,916 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 14:44:01,916 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 14:44:01,916 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 14:44:01,917 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 14:44:01,917 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 14:44:01,917 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 14:44:02,154 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 14:44:02,173 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 14:44:02,175 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 14:44:02,176 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 14:44:02,177 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 14:44:02,178 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound10.c [2021-05-02 14:44:02,229 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d2ebc920/8b86fee9a7c64d01979778488c08f4c2/FLAGe46685d55 [2021-05-02 14:44:02,586 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 14:44:02,586 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound10.c [2021-05-02 14:44:02,591 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d2ebc920/8b86fee9a7c64d01979778488c08f4c2/FLAGe46685d55 [2021-05-02 14:44:02,603 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d2ebc920/8b86fee9a7c64d01979778488c08f4c2 [2021-05-02 14:44:02,606 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 14:44:02,608 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 14:44:02,610 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 14:44:02,610 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 14:44:02,613 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 14:44:02,614 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:44:02" (1/1) ... [2021-05-02 14:44:02,615 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64823160 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:44:02, skipping insertion in model container [2021-05-02 14:44:02,615 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:44:02" (1/1) ... [2021-05-02 14:44:02,619 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 14:44:02,633 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 14:44:02,751 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/egcd-ll_unwindbound10.c[489,502] [2021-05-02 14:44:02,771 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:44:02,777 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 14:44:02,809 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/egcd-ll_unwindbound10.c[489,502] [2021-05-02 14:44:02,813 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:44:02,825 INFO L208 MainTranslator]: Completed translation [2021-05-02 14:44:02,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:44:02 WrapperNode [2021-05-02 14:44:02,825 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 14:44:02,826 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 14:44:02,826 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 14:44:02,826 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 14:44:02,834 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:44:02" (1/1) ... [2021-05-02 14:44:02,834 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:44:02" (1/1) ... [2021-05-02 14:44:02,839 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:44:02" (1/1) ... [2021-05-02 14:44:02,839 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:44:02" (1/1) ... [2021-05-02 14:44:02,849 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:44:02" (1/1) ... [2021-05-02 14:44:02,852 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:44:02" (1/1) ... [2021-05-02 14:44:02,858 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:44:02" (1/1) ... [2021-05-02 14:44:02,861 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 14:44:02,862 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 14:44:02,862 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 14:44:02,862 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 14:44:02,863 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:44:02" (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 14:44:02,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 14:44:02,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 14:44:02,927 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 14:44:02,927 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 14:44:02,927 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 14:44:02,927 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 14:44:02,928 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 14:44:02,928 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 14:44:02,928 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 14:44:02,928 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 14:44:02,928 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 14:44:02,929 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 14:44:02,929 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 14:44:02,929 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 14:44:02,930 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 14:44:02,930 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 14:44:02,930 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 14:44:02,931 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 14:44:02,931 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 14:44:02,931 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 14:44:03,154 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 14:44:03,154 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 14:44:03,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:44:03 BoogieIcfgContainer [2021-05-02 14:44:03,155 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 14:44:03,156 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 14:44:03,156 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 14:44:03,174 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 14:44:03,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 02:44:02" (1/3) ... [2021-05-02 14:44:03,175 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2087710f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:44:03, skipping insertion in model container [2021-05-02 14:44:03,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:44:02" (2/3) ... [2021-05-02 14:44:03,175 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2087710f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:44:03, skipping insertion in model container [2021-05-02 14:44:03,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:44:03" (3/3) ... [2021-05-02 14:44:03,176 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_unwindbound10.c [2021-05-02 14:44:03,180 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 14:44:03,182 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 14:44:03,192 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 14:44:03,216 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 14:44:03,216 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 14:44:03,216 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 14:44:03,216 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 14:44:03,217 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 14:44:03,217 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 14:44:03,217 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 14:44:03,217 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 14:44:03,227 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 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 14:44:03,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 14:44:03,231 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:44:03,231 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:44:03,232 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:44:03,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:44:03,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1226702723, now seen corresponding path program 1 times [2021-05-02 14:44:03,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:44:03,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806713757] [2021-05-02 14:44:03,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:44:03,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:44:03,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 14:44:03,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:44:03,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 14:44:03,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:44:03,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 14:44:03,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:44:03,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 14:44:03,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:44:03,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806713757] [2021-05-02 14:44:03,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806713757] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:44:03,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:44:03,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 14:44:03,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477632728] [2021-05-02 14:44:03,486 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 14:44:03,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:44:03,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 14:44:03,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:44:03,496 INFO L87 Difference]: Start difference. First operand has 35 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:44:03,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:44:03,634 INFO L93 Difference]: Finished difference Result 64 states and 97 transitions. [2021-05-02 14:44:03,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 14:44:03,636 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-02 14:44:03,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:44:03,640 INFO L225 Difference]: With dead ends: 64 [2021-05-02 14:44:03,640 INFO L226 Difference]: Without dead ends: 31 [2021-05-02 14:44:03,642 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 48.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:44:03,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-02 14:44:03,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2021-05-02 14:44:03,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 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 14:44:03,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2021-05-02 14:44:03,698 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 22 [2021-05-02 14:44:03,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:44:03,699 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2021-05-02 14:44:03,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:44:03,699 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2021-05-02 14:44:03,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 14:44:03,700 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:44:03,700 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:44:03,700 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 14:44:03,700 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:44:03,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:44:03,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1346542817, now seen corresponding path program 1 times [2021-05-02 14:44:03,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:44:03,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120891442] [2021-05-02 14:44:03,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:44:03,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:44:03,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 14:44:03,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:44:03,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 14:44:03,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:44:03,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 14:44:03,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:44:03,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 14:44:03,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:44:03,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120891442] [2021-05-02 14:44:03,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120891442] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:44:03,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:44:03,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 14:44:03,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49902821] [2021-05-02 14:44:03,828 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 14:44:03,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:44:03,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 14:44:03,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 14:44:03,829 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:44:03,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:44:03,968 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2021-05-02 14:44:03,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 14:44:03,969 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 14:44:03,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:44:03,970 INFO L225 Difference]: With dead ends: 42 [2021-05-02 14:44:03,970 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 14:44:03,970 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 58.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:44:03,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 14:44:03,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 14:44:03,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 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 14:44:03,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2021-05-02 14:44:03,976 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 23 [2021-05-02 14:44:03,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:44:03,977 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2021-05-02 14:44:03,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:44:03,977 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2021-05-02 14:44:03,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 14:44:03,978 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:44:03,978 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:44:03,978 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 14:44:03,978 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:44:03,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:44:03,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1348211113, now seen corresponding path program 1 times [2021-05-02 14:44:03,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:44:03,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239464956] [2021-05-02 14:44:03,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:44:03,998 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:44:03,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1826684168] [2021-05-02 14:44:03,999 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 14:44:04,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:44:04,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 14:44:04,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:44:04,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:04,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 14:44:04,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:44:04,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239464956] [2021-05-02 14:44:04,241 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:44:04,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826684168] [2021-05-02 14:44:04,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826684168] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:44:04,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:44:04,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 14:44:04,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626283410] [2021-05-02 14:44:04,242 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 14:44:04,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:44:04,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 14:44:04,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:44:04,243 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 14:44:04,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:44:04,308 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2021-05-02 14:44:04,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 14:44:04,308 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2021-05-02 14:44:04,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:44:04,309 INFO L225 Difference]: With dead ends: 49 [2021-05-02 14:44:04,309 INFO L226 Difference]: Without dead ends: 47 [2021-05-02 14:44:04,309 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 34.1ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:44:04,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-02 14:44:04,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2021-05-02 14:44:04,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 26 states have internal predecessors, (31), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 14:44:04,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2021-05-02 14:44:04,316 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 23 [2021-05-02 14:44:04,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:44:04,317 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2021-05-02 14:44:04,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 14:44:04,317 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2021-05-02 14:44:04,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 14:44:04,317 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:44:04,317 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 14:44:04,534 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 14:44:04,534 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:44:04,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:44:04,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1060153012, now seen corresponding path program 1 times [2021-05-02 14:44:04,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:44:04,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556874266] [2021-05-02 14:44:04,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:44:04,550 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:44:04,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1445961330] [2021-05-02 14:44:04,551 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 14:44:04,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:44:04,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 14:44:04,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:44:04,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:04,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:04,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:04,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:04,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:04,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:04,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:04,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:04,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:04,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:04,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 14:44:04,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:44:04,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556874266] [2021-05-02 14:44:04,720 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:44:04,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445961330] [2021-05-02 14:44:04,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445961330] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:44:04,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:44:04,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 14:44:04,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941922312] [2021-05-02 14:44:04,721 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:44:04,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:44:04,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:44:04,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:44:04,722 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 14:44:04,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:44:04,821 INFO L93 Difference]: Finished difference Result 71 states and 104 transitions. [2021-05-02 14:44:04,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:44:04,821 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2021-05-02 14:44:04,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:44:04,823 INFO L225 Difference]: With dead ends: 71 [2021-05-02 14:44:04,823 INFO L226 Difference]: Without dead ends: 69 [2021-05-02 14:44:04,824 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 42.2ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:44:04,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-02 14:44:04,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2021-05-02 14:44:04,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 35 states have internal predecessors, (45), 23 states have call successors, (23), 6 states have call predecessors, (23), 5 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 14:44:04,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 89 transitions. [2021-05-02 14:44:04,837 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 89 transitions. Word has length 28 [2021-05-02 14:44:04,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:44:04,837 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 89 transitions. [2021-05-02 14:44:04,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 14:44:04,837 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 89 transitions. [2021-05-02 14:44:04,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 14:44:04,838 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:44:04,838 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 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 14:44:05,048 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:44:05,049 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:44:05,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:44:05,049 INFO L82 PathProgramCache]: Analyzing trace with hash -560761015, now seen corresponding path program 1 times [2021-05-02 14:44:05,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:44:05,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392869077] [2021-05-02 14:44:05,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:44:05,059 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:44:05,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [777792166] [2021-05-02 14:44:05,059 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 14:44:05,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:44:05,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 14:44:05,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:44:05,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:05,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:05,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:05,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:05,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:05,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:05,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:05,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:05,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:05,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:05,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:05,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:05,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:05,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:05,209 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-02 14:44:05,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:44:05,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392869077] [2021-05-02 14:44:05,209 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:44:05,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777792166] [2021-05-02 14:44:05,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777792166] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:44:05,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:44:05,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 14:44:05,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755463591] [2021-05-02 14:44:05,210 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:44:05,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:44:05,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:44:05,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:44:05,210 INFO L87 Difference]: Start difference. First operand 62 states and 89 transitions. Second operand has 9 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), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 14:44:05,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:44:05,311 INFO L93 Difference]: Finished difference Result 69 states and 95 transitions. [2021-05-02 14:44:05,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:44:05,311 INFO L78 Accepts]: Start accepts. Automaton has has 9 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), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 33 [2021-05-02 14:44:05,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:44:05,312 INFO L225 Difference]: With dead ends: 69 [2021-05-02 14:44:05,312 INFO L226 Difference]: Without dead ends: 65 [2021-05-02 14:44:05,313 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 46.7ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:44:05,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-02 14:44:05,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-05-02 14:44:05,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 38 states have internal predecessors, (48), 22 states have call successors, (22), 7 states have call predecessors, (22), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 14:44:05,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 89 transitions. [2021-05-02 14:44:05,320 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 89 transitions. Word has length 33 [2021-05-02 14:44:05,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:44:05,320 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 89 transitions. [2021-05-02 14:44:05,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 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), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 14:44:05,321 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 89 transitions. [2021-05-02 14:44:05,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 14:44:05,321 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:44:05,321 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 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] [2021-05-02 14:44:05,535 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:44:05,535 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:44:05,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:44:05,536 INFO L82 PathProgramCache]: Analyzing trace with hash 201438379, now seen corresponding path program 1 times [2021-05-02 14:44:05,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:44:05,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781352569] [2021-05-02 14:44:05,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:44:05,559 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:44:05,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [520949909] [2021-05-02 14:44:05,560 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 14:44:05,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:44:05,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 14:44:05,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:44:05,673 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 14:44:05,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:44:05,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781352569] [2021-05-02 14:44:05,673 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:44:05,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520949909] [2021-05-02 14:44:05,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520949909] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:44:05,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:44:05,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 14:44:05,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196845155] [2021-05-02 14:44:05,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 14:44:05,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:44:05,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 14:44:05,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 14:44:05,674 INFO L87 Difference]: Start difference. First operand 65 states and 89 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-05-02 14:44:05,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:44:05,703 INFO L93 Difference]: Finished difference Result 77 states and 104 transitions. [2021-05-02 14:44:05,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 14:44:05,703 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2021-05-02 14:44:05,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:44:05,704 INFO L225 Difference]: With dead ends: 77 [2021-05-02 14:44:05,704 INFO L226 Difference]: Without dead ends: 75 [2021-05-02 14:44:05,704 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:44:05,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-02 14:44:05,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2021-05-02 14:44:05,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 43 states have internal predecessors, (51), 24 states have call successors, (24), 8 states have call predecessors, (24), 7 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 14:44:05,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 96 transitions. [2021-05-02 14:44:05,720 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 96 transitions. Word has length 39 [2021-05-02 14:44:05,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:44:05,721 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 96 transitions. [2021-05-02 14:44:05,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-05-02 14:44:05,721 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 96 transitions. [2021-05-02 14:44:05,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 14:44:05,724 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:44:05,724 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 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 14:44:05,941 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:44:05,941 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:44:05,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:44:05,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1085077998, now seen corresponding path program 1 times [2021-05-02 14:44:05,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:44:05,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464603041] [2021-05-02 14:44:05,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:44:05,947 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:44:05,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1392610769] [2021-05-02 14:44:05,947 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 14:44:05,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:44:05,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 14:44:05,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:44:05,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:06,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:06,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:06,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:06,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:06,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:06,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:06,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:06,067 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 14:44:06,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:44:06,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464603041] [2021-05-02 14:44:06,067 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:44:06,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392610769] [2021-05-02 14:44:06,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392610769] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:44:06,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:44:06,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 14:44:06,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104845045] [2021-05-02 14:44:06,068 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 14:44:06,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:44:06,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 14:44:06,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 14:44:06,068 INFO L87 Difference]: Start difference. First operand 71 states and 96 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 14:44:06,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:44:06,109 INFO L93 Difference]: Finished difference Result 111 states and 137 transitions. [2021-05-02 14:44:06,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 14:44:06,110 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2021-05-02 14:44:06,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:44:06,110 INFO L225 Difference]: With dead ends: 111 [2021-05-02 14:44:06,110 INFO L226 Difference]: Without dead ends: 97 [2021-05-02 14:44:06,111 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.1ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:44:06,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-05-02 14:44:06,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2021-05-02 14:44:06,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 61 states have internal predecessors, (69), 26 states have call successors, (26), 13 states have call predecessors, (26), 11 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 14:44:06,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 117 transitions. [2021-05-02 14:44:06,119 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 117 transitions. Word has length 42 [2021-05-02 14:44:06,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:44:06,119 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 117 transitions. [2021-05-02 14:44:06,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 14:44:06,119 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 117 transitions. [2021-05-02 14:44:06,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 14:44:06,120 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:44:06,120 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:44:06,336 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-02 14:44:06,337 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:44:06,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:44:06,337 INFO L82 PathProgramCache]: Analyzing trace with hash 691597660, now seen corresponding path program 1 times [2021-05-02 14:44:06,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:44:06,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717643110] [2021-05-02 14:44:06,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:44:06,342 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:44:06,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1560781060] [2021-05-02 14:44:06,343 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 14:44:06,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:44:06,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 14:44:06,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:44:06,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:06,496 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 14:44:06,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:44:06,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717643110] [2021-05-02 14:44:06,496 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:44:06,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560781060] [2021-05-02 14:44:06,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560781060] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:44:06,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:44:06,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 14:44:06,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047649001] [2021-05-02 14:44:06,497 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 14:44:06,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:44:06,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 14:44:06,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:44:06,499 INFO L87 Difference]: Start difference. First operand 95 states and 117 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 14:44:06,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:44:06,555 INFO L93 Difference]: Finished difference Result 106 states and 131 transitions. [2021-05-02 14:44:06,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 14:44:06,555 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 42 [2021-05-02 14:44:06,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:44:06,557 INFO L225 Difference]: With dead ends: 106 [2021-05-02 14:44:06,557 INFO L226 Difference]: Without dead ends: 104 [2021-05-02 14:44:06,557 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 29.9ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:44:06,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-05-02 14:44:06,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2021-05-02 14:44:06,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 60 states have (on average 1.2) internal successors, (72), 66 states have internal predecessors, (72), 30 states have call successors, (30), 14 states have call predecessors, (30), 12 states have return successors, (26), 22 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-02 14:44:06,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2021-05-02 14:44:06,566 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 42 [2021-05-02 14:44:06,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:44:06,566 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2021-05-02 14:44:06,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 14:44:06,566 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2021-05-02 14:44:06,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 14:44:06,566 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:44:06,566 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:44:06,780 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:44:06,781 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:44:06,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:44:06,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1376219446, now seen corresponding path program 1 times [2021-05-02 14:44:06,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:44:06,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24774116] [2021-05-02 14:44:06,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:44:06,787 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:44:06,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [91916510] [2021-05-02 14:44:06,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 14:44:06,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:44:06,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 14:44:06,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:44:06,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:06,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:06,951 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 14:44:06,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:44:06,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24774116] [2021-05-02 14:44:06,951 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:44:06,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91916510] [2021-05-02 14:44:06,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91916510] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:44:06,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:44:06,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 14:44:06,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247358078] [2021-05-02 14:44:06,953 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:44:06,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:44:06,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:44:06,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:44:06,954 INFO L87 Difference]: Start difference. First operand 103 states and 128 transitions. Second operand has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 14:44:07,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:44:07,086 INFO L93 Difference]: Finished difference Result 118 states and 148 transitions. [2021-05-02 14:44:07,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:44:07,087 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 44 [2021-05-02 14:44:07,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:44:07,089 INFO L225 Difference]: With dead ends: 118 [2021-05-02 14:44:07,089 INFO L226 Difference]: Without dead ends: 106 [2021-05-02 14:44:07,091 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 42.0ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:44:07,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-02 14:44:07,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2021-05-02 14:44:07,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 67 states have internal predecessors, (71), 31 states have call successors, (31), 13 states have call predecessors, (31), 12 states have return successors, (28), 23 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-02 14:44:07,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 130 transitions. [2021-05-02 14:44:07,110 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 130 transitions. Word has length 44 [2021-05-02 14:44:07,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:44:07,110 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 130 transitions. [2021-05-02 14:44:07,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 14:44:07,110 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 130 transitions. [2021-05-02 14:44:07,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 14:44:07,113 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:44:07,113 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:44:07,324 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:44:07,325 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:44:07,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:44:07,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1137310021, now seen corresponding path program 1 times [2021-05-02 14:44:07,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:44:07,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882717860] [2021-05-02 14:44:07,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:44:07,330 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:44:07,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1521076466] [2021-05-02 14:44:07,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 14:44:07,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:44:07,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 14:44:07,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:44:07,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:07,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:07,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:07,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:07,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:07,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:07,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:07,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:07,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:07,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:07,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:07,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:07,544 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 14:44:07,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:44:07,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882717860] [2021-05-02 14:44:07,544 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:44:07,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521076466] [2021-05-02 14:44:07,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521076466] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:44:07,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:44:07,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:44:07,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956949052] [2021-05-02 14:44:07,545 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:44:07,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:44:07,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:44:07,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:44:07,546 INFO L87 Difference]: Start difference. First operand 104 states and 130 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 14:44:07,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:44:07,722 INFO L93 Difference]: Finished difference Result 131 states and 169 transitions. [2021-05-02 14:44:07,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:44:07,722 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 47 [2021-05-02 14:44:07,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:44:07,726 INFO L225 Difference]: With dead ends: 131 [2021-05-02 14:44:07,726 INFO L226 Difference]: Without dead ends: 129 [2021-05-02 14:44:07,727 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 69.2ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-02 14:44:07,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-05-02 14:44:07,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 124. [2021-05-02 14:44:07,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 79 states have internal predecessors, (87), 37 states have call successors, (37), 15 states have call predecessors, (37), 14 states have return successors, (34), 29 states have call predecessors, (34), 34 states have call successors, (34) [2021-05-02 14:44:07,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 158 transitions. [2021-05-02 14:44:07,740 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 158 transitions. Word has length 47 [2021-05-02 14:44:07,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:44:07,741 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 158 transitions. [2021-05-02 14:44:07,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 14:44:07,741 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 158 transitions. [2021-05-02 14:44:07,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-02 14:44:07,741 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:44:07,742 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 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 14:44:07,956 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 14:44:07,957 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:44:07,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:44:07,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1475439812, now seen corresponding path program 2 times [2021-05-02 14:44:07,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:44:07,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145723410] [2021-05-02 14:44:07,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:44:07,962 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:44:07,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1490765262] [2021-05-02 14:44:07,962 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:44:08,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:44:08,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:44:08,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 14:44:08,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:44:08,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:08,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:08,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:08,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:08,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:08,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:08,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:08,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:08,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:08,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:08,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:08,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:08,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:08,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:08,183 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-05-02 14:44:08,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:44:08,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145723410] [2021-05-02 14:44:08,183 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:44:08,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490765262] [2021-05-02 14:44:08,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490765262] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:44:08,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:44:08,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 14:44:08,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817930283] [2021-05-02 14:44:08,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:44:08,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:44:08,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:44:08,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:44:08,185 INFO L87 Difference]: Start difference. First operand 124 states and 158 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 14:44:08,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:44:08,311 INFO L93 Difference]: Finished difference Result 151 states and 203 transitions. [2021-05-02 14:44:08,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:44:08,311 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 52 [2021-05-02 14:44:08,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:44:08,312 INFO L225 Difference]: With dead ends: 151 [2021-05-02 14:44:08,312 INFO L226 Difference]: Without dead ends: 145 [2021-05-02 14:44:08,312 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 67.4ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:44:08,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-05-02 14:44:08,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-05-02 14:44:08,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 81 states have (on average 1.2345679012345678) internal successors, (100), 90 states have internal predecessors, (100), 48 states have call successors, (48), 16 states have call predecessors, (48), 15 states have return successors, (44), 38 states have call predecessors, (44), 44 states have call successors, (44) [2021-05-02 14:44:08,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 192 transitions. [2021-05-02 14:44:08,322 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 192 transitions. Word has length 52 [2021-05-02 14:44:08,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:44:08,322 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 192 transitions. [2021-05-02 14:44:08,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 14:44:08,322 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 192 transitions. [2021-05-02 14:44:08,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 14:44:08,322 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:44:08,322 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:44:08,536 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:44:08,537 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:44:08,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:44:08,537 INFO L82 PathProgramCache]: Analyzing trace with hash 220857665, now seen corresponding path program 2 times [2021-05-02 14:44:08,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:44:08,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289539796] [2021-05-02 14:44:08,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:44:08,542 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:44:08,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [457304838] [2021-05-02 14:44:08,543 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:44:08,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:44:08,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:44:08,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 14:44:08,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:44:08,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:08,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:08,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:08,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:08,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:08,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:08,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:08,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:08,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:08,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:08,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:08,671 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 47 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 14:44:08,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:44:08,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289539796] [2021-05-02 14:44:08,671 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:44:08,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457304838] [2021-05-02 14:44:08,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457304838] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:44:08,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:44:08,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 14:44:08,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23965551] [2021-05-02 14:44:08,672 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 14:44:08,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:44:08,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 14:44:08,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:44:08,673 INFO L87 Difference]: Start difference. First operand 145 states and 192 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 14:44:08,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:44:08,721 INFO L93 Difference]: Finished difference Result 199 states and 251 transitions. [2021-05-02 14:44:08,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 14:44:08,721 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 61 [2021-05-02 14:44:08,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:44:08,722 INFO L225 Difference]: With dead ends: 199 [2021-05-02 14:44:08,722 INFO L226 Difference]: Without dead ends: 173 [2021-05-02 14:44:08,723 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 18.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:44:08,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-05-02 14:44:08,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2021-05-02 14:44:08,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 104 states have (on average 1.1826923076923077) internal successors, (123), 113 states have internal predecessors, (123), 48 states have call successors, (48), 21 states have call predecessors, (48), 20 states have return successors, (44), 38 states have call predecessors, (44), 44 states have call successors, (44) [2021-05-02 14:44:08,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 215 transitions. [2021-05-02 14:44:08,731 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 215 transitions. Word has length 61 [2021-05-02 14:44:08,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:44:08,732 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 215 transitions. [2021-05-02 14:44:08,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 14:44:08,732 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 215 transitions. [2021-05-02 14:44:08,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 14:44:08,732 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:44:08,732 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:44:08,950 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:44:08,950 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:44:08,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:44:08,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1997533323, now seen corresponding path program 1 times [2021-05-02 14:44:08,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:44:08,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748080963] [2021-05-02 14:44:08,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:44:08,956 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:44:08,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [490333532] [2021-05-02 14:44:08,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:44:09,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:44:09,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 14:44:09,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:44:09,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:09,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:09,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:09,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:09,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:09,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:09,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:09,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:09,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:09,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:09,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:09,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:09,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:09,195 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-05-02 14:44:09,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:44:09,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748080963] [2021-05-02 14:44:09,195 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:44:09,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490333532] [2021-05-02 14:44:09,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490333532] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:44:09,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:44:09,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:44:09,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135569172] [2021-05-02 14:44:09,196 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:44:09,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:44:09,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:44:09,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:44:09,197 INFO L87 Difference]: Start difference. First operand 173 states and 215 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 14:44:09,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:44:09,363 INFO L93 Difference]: Finished difference Result 188 states and 237 transitions. [2021-05-02 14:44:09,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:44:09,364 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 61 [2021-05-02 14:44:09,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:44:09,365 INFO L225 Difference]: With dead ends: 188 [2021-05-02 14:44:09,365 INFO L226 Difference]: Without dead ends: 186 [2021-05-02 14:44:09,365 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 107.5ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:44:09,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-05-02 14:44:09,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184. [2021-05-02 14:44:09,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 108 states have (on average 1.1851851851851851) internal successors, (128), 118 states have internal predecessors, (128), 54 states have call successors, (54), 22 states have call predecessors, (54), 21 states have return successors, (50), 43 states have call predecessors, (50), 50 states have call successors, (50) [2021-05-02 14:44:09,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 232 transitions. [2021-05-02 14:44:09,375 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 232 transitions. Word has length 61 [2021-05-02 14:44:09,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:44:09,375 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 232 transitions. [2021-05-02 14:44:09,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 14:44:09,376 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 232 transitions. [2021-05-02 14:44:09,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 14:44:09,376 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:44:09,376 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:44:09,584 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 14:44:09,585 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:44:09,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:44:09,585 INFO L82 PathProgramCache]: Analyzing trace with hash 284565575, now seen corresponding path program 2 times [2021-05-02 14:44:09,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:44:09,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138090100] [2021-05-02 14:44:09,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:44:09,590 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:44:09,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [441711680] [2021-05-02 14:44:09,591 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:44:09,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:44:09,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:44:09,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 14:44:09,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:44:09,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:09,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:09,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:09,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:09,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:09,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:09,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:09,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:09,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:09,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:09,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:09,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:09,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:09,811 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-05-02 14:44:09,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:44:09,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138090100] [2021-05-02 14:44:09,812 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:44:09,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441711680] [2021-05-02 14:44:09,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441711680] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:44:09,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:44:09,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:44:09,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031384137] [2021-05-02 14:44:09,812 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:44:09,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:44:09,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:44:09,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:44:09,813 INFO L87 Difference]: Start difference. First operand 184 states and 232 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 14:44:10,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:44:10,000 INFO L93 Difference]: Finished difference Result 198 states and 252 transitions. [2021-05-02 14:44:10,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:44:10,001 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 61 [2021-05-02 14:44:10,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:44:10,002 INFO L225 Difference]: With dead ends: 198 [2021-05-02 14:44:10,002 INFO L226 Difference]: Without dead ends: 193 [2021-05-02 14:44:10,002 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 108.1ms TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-05-02 14:44:10,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-05-02 14:44:10,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2021-05-02 14:44:10,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 112 states have (on average 1.1785714285714286) internal successors, (132), 122 states have internal predecessors, (132), 57 states have call successors, (57), 23 states have call predecessors, (57), 22 states have return successors, (53), 46 states have call predecessors, (53), 53 states have call successors, (53) [2021-05-02 14:44:10,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 242 transitions. [2021-05-02 14:44:10,012 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 242 transitions. Word has length 61 [2021-05-02 14:44:10,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:44:10,013 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 242 transitions. [2021-05-02 14:44:10,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 14:44:10,013 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 242 transitions. [2021-05-02 14:44:10,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-02 14:44:10,013 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:44:10,013 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:44:10,228 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 14:44:10,229 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:44:10,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:44:10,229 INFO L82 PathProgramCache]: Analyzing trace with hash 404368620, now seen corresponding path program 2 times [2021-05-02 14:44:10,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:44:10,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487792013] [2021-05-02 14:44:10,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:44:10,234 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:44:10,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [374188622] [2021-05-02 14:44:10,234 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:44:10,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:44:10,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:44:10,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-02 14:44:10,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:44:10,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:10,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:10,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:10,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:10,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:10,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:10,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:10,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:10,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:10,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:10,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:10,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:10,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:10,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:10,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:10,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:10,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:10,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:10,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:10,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:10,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:10,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:10,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:10,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:10,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:10,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:10,498 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-05-02 14:44:10,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:44:10,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487792013] [2021-05-02 14:44:10,498 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:44:10,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374188622] [2021-05-02 14:44:10,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374188622] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:44:10,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:44:10,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 14:44:10,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788583163] [2021-05-02 14:44:10,498 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 14:44:10,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:44:10,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 14:44:10,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:44:10,499 INFO L87 Difference]: Start difference. First operand 192 states and 242 transitions. Second operand has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 14:44:10,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:44:10,725 INFO L93 Difference]: Finished difference Result 219 states and 281 transitions. [2021-05-02 14:44:10,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 14:44:10,726 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) Word has length 66 [2021-05-02 14:44:10,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:44:10,727 INFO L225 Difference]: With dead ends: 219 [2021-05-02 14:44:10,727 INFO L226 Difference]: Without dead ends: 217 [2021-05-02 14:44:10,729 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 108.4ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-05-02 14:44:10,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-05-02 14:44:10,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 212. [2021-05-02 14:44:10,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 124 states have (on average 1.1935483870967742) internal successors, (148), 134 states have internal predecessors, (148), 63 states have call successors, (63), 25 states have call predecessors, (63), 24 states have return successors, (59), 52 states have call predecessors, (59), 59 states have call successors, (59) [2021-05-02 14:44:10,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 270 transitions. [2021-05-02 14:44:10,751 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 270 transitions. Word has length 66 [2021-05-02 14:44:10,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:44:10,751 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 270 transitions. [2021-05-02 14:44:10,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 14:44:10,751 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 270 transitions. [2021-05-02 14:44:10,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-02 14:44:10,752 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:44:10,752 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:44:10,964 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-02 14:44:10,965 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:44:10,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:44:10,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1105968494, now seen corresponding path program 3 times [2021-05-02 14:44:10,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:44:10,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780459919] [2021-05-02 14:44:10,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:44:10,970 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:44:10,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [939208580] [2021-05-02 14:44:10,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:44:11,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 14:44:11,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:44:11,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 14:44:11,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:44:11,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:11,144 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 28 proven. 19 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-05-02 14:44:11,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:44:11,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780459919] [2021-05-02 14:44:11,144 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:44:11,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939208580] [2021-05-02 14:44:11,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939208580] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:44:11,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:44:11,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 14:44:11,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6876002] [2021-05-02 14:44:11,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:44:11,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:44:11,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:44:11,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:44:11,145 INFO L87 Difference]: Start difference. First operand 212 states and 270 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 14:44:11,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:44:11,316 INFO L93 Difference]: Finished difference Result 235 states and 302 transitions. [2021-05-02 14:44:11,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:44:11,316 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 66 [2021-05-02 14:44:11,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:44:11,317 INFO L225 Difference]: With dead ends: 235 [2021-05-02 14:44:11,317 INFO L226 Difference]: Without dead ends: 233 [2021-05-02 14:44:11,317 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 58.9ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:44:11,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-05-02 14:44:11,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 217. [2021-05-02 14:44:11,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 128 states have (on average 1.1953125) internal successors, (153), 138 states have internal predecessors, (153), 63 states have call successors, (63), 26 states have call predecessors, (63), 25 states have return successors, (59), 52 states have call predecessors, (59), 59 states have call successors, (59) [2021-05-02 14:44:11,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 275 transitions. [2021-05-02 14:44:11,328 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 275 transitions. Word has length 66 [2021-05-02 14:44:11,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:44:11,328 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 275 transitions. [2021-05-02 14:44:11,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 14:44:11,328 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 275 transitions. [2021-05-02 14:44:11,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-02 14:44:11,328 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:44:11,329 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:44:11,543 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:44:11,544 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:44:11,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:44:11,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1181721515, now seen corresponding path program 4 times [2021-05-02 14:44:11,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:44:11,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225460456] [2021-05-02 14:44:11,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:44:11,549 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:44:11,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1783573351] [2021-05-02 14:44:11,549 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:44:11,586 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 14:44:11,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:44:11,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-02 14:44:11,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:44:11,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:11,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:11,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:11,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:11,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:11,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:11,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:11,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:11,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:11,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:11,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:11,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:11,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:11,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:11,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:11,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:11,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:11,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:11,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:11,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:11,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:11,867 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 36 proven. 21 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-05-02 14:44:11,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:44:11,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225460456] [2021-05-02 14:44:11,868 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:44:11,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783573351] [2021-05-02 14:44:11,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783573351] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:44:11,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:44:11,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 14:44:11,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025635641] [2021-05-02 14:44:11,870 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 14:44:11,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:44:11,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 14:44:11,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-02 14:44:11,871 INFO L87 Difference]: Start difference. First operand 217 states and 275 transitions. Second operand has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-02 14:44:12,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:44:12,208 INFO L93 Difference]: Finished difference Result 242 states and 310 transitions. [2021-05-02 14:44:12,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 14:44:12,209 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) Word has length 71 [2021-05-02 14:44:12,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:44:12,210 INFO L225 Difference]: With dead ends: 242 [2021-05-02 14:44:12,210 INFO L226 Difference]: Without dead ends: 235 [2021-05-02 14:44:12,210 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 149.9ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-05-02 14:44:12,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-05-02 14:44:12,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 193. [2021-05-02 14:44:12,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 115 states have (on average 1.182608695652174) internal successors, (136), 124 states have internal predecessors, (136), 54 states have call successors, (54), 24 states have call predecessors, (54), 23 states have return successors, (50), 44 states have call predecessors, (50), 50 states have call successors, (50) [2021-05-02 14:44:12,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 240 transitions. [2021-05-02 14:44:12,221 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 240 transitions. Word has length 71 [2021-05-02 14:44:12,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:44:12,221 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 240 transitions. [2021-05-02 14:44:12,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-02 14:44:12,221 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 240 transitions. [2021-05-02 14:44:12,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-02 14:44:12,222 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:44:12,222 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:44:12,438 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 14:44:12,438 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:44:12,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:44:12,438 INFO L82 PathProgramCache]: Analyzing trace with hash 787354729, now seen corresponding path program 3 times [2021-05-02 14:44:12,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:44:12,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182472276] [2021-05-02 14:44:12,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:44:12,443 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:44:12,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1638779477] [2021-05-02 14:44:12,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:44:12,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 14:44:12,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:44:12,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 14:44:12,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:44:12,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:12,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:12,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:12,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:12,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:12,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:12,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:12,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:12,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:12,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:12,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:12,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:12,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:12,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:12,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:12,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:12,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:12,751 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-05-02 14:44:12,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:44:12,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182472276] [2021-05-02 14:44:12,752 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:44:12,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638779477] [2021-05-02 14:44:12,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638779477] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:44:12,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:44:12,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:44:12,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409393874] [2021-05-02 14:44:12,753 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:44:12,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:44:12,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:44:12,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:44:12,754 INFO L87 Difference]: Start difference. First operand 193 states and 240 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 14:44:12,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:44:12,962 INFO L93 Difference]: Finished difference Result 220 states and 285 transitions. [2021-05-02 14:44:12,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:44:12,962 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 71 [2021-05-02 14:44:12,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:44:12,963 INFO L225 Difference]: With dead ends: 220 [2021-05-02 14:44:12,963 INFO L226 Difference]: Without dead ends: 214 [2021-05-02 14:44:12,964 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 87.6ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:44:12,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-05-02 14:44:12,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 209. [2021-05-02 14:44:12,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 124 states have (on average 1.2016129032258065) internal successors, (149), 133 states have internal predecessors, (149), 60 states have call successors, (60), 25 states have call predecessors, (60), 24 states have return successors, (56), 50 states have call predecessors, (56), 56 states have call successors, (56) [2021-05-02 14:44:12,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 265 transitions. [2021-05-02 14:44:12,975 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 265 transitions. Word has length 71 [2021-05-02 14:44:12,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:44:12,977 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 265 transitions. [2021-05-02 14:44:12,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 14:44:12,977 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 265 transitions. [2021-05-02 14:44:12,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 14:44:12,977 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:44:12,977 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:44:13,192 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 14:44:13,192 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:44:13,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:44:13,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1898774094, now seen corresponding path program 3 times [2021-05-02 14:44:13,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:44:13,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816467376] [2021-05-02 14:44:13,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:44:13,199 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:44:13,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [297599459] [2021-05-02 14:44:13,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:44:13,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 14:44:13,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:44:13,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 14:44:13,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:44:13,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:13,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:13,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:13,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:13,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:13,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:13,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:13,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:13,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:13,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:13,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:13,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:13,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:13,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:13,363 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 18 proven. 135 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 14:44:13,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:44:13,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816467376] [2021-05-02 14:44:13,363 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:44:13,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297599459] [2021-05-02 14:44:13,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297599459] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:44:13,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:44:13,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 14:44:13,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115316203] [2021-05-02 14:44:13,364 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 14:44:13,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:44:13,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 14:44:13,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:44:13,365 INFO L87 Difference]: Start difference. First operand 209 states and 265 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 14:44:13,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:44:13,471 INFO L93 Difference]: Finished difference Result 269 states and 330 transitions. [2021-05-02 14:44:13,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:44:13,471 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 80 [2021-05-02 14:44:13,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:44:13,473 INFO L225 Difference]: With dead ends: 269 [2021-05-02 14:44:13,473 INFO L226 Difference]: Without dead ends: 243 [2021-05-02 14:44:13,473 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 30.0ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:44:13,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-05-02 14:44:13,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 230. [2021-05-02 14:44:13,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 143 states have (on average 1.1538461538461537) internal successors, (165), 152 states have internal predecessors, (165), 57 states have call successors, (57), 30 states have call predecessors, (57), 29 states have return successors, (53), 47 states have call predecessors, (53), 53 states have call successors, (53) [2021-05-02 14:44:13,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 275 transitions. [2021-05-02 14:44:13,488 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 275 transitions. Word has length 80 [2021-05-02 14:44:13,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:44:13,488 INFO L480 AbstractCegarLoop]: Abstraction has 230 states and 275 transitions. [2021-05-02 14:44:13,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 14:44:13,488 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 275 transitions. [2021-05-02 14:44:13,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 14:44:13,489 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:44:13,489 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:44:13,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-02 14:44:13,705 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:44:13,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:44:13,705 INFO L82 PathProgramCache]: Analyzing trace with hash -122098436, now seen corresponding path program 5 times [2021-05-02 14:44:13,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:44:13,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359999344] [2021-05-02 14:44:13,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:44:13,711 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:44:13,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [719531721] [2021-05-02 14:44:13,711 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:44:14,842 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-02 14:44:14,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:44:14,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 14:44:14,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:44:14,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:14,989 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 20 proven. 45 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-05-02 14:44:14,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:44:14,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359999344] [2021-05-02 14:44:14,990 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:44:14,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719531721] [2021-05-02 14:44:14,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719531721] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:44:14,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:44:14,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 14:44:14,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132950137] [2021-05-02 14:44:14,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:44:14,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:44:14,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:44:14,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:44:14,991 INFO L87 Difference]: Start difference. First operand 230 states and 275 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 14:44:15,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:44:15,128 INFO L93 Difference]: Finished difference Result 266 states and 328 transitions. [2021-05-02 14:44:15,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:44:15,129 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 80 [2021-05-02 14:44:15,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:44:15,130 INFO L225 Difference]: With dead ends: 266 [2021-05-02 14:44:15,130 INFO L226 Difference]: Without dead ends: 264 [2021-05-02 14:44:15,131 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 50.8ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:44:15,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-05-02 14:44:15,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 250. [2021-05-02 14:44:15,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 152 states have (on average 1.1644736842105263) internal successors, (177), 163 states have internal predecessors, (177), 67 states have call successors, (67), 31 states have call predecessors, (67), 30 states have return successors, (63), 55 states have call predecessors, (63), 63 states have call successors, (63) [2021-05-02 14:44:15,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 307 transitions. [2021-05-02 14:44:15,144 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 307 transitions. Word has length 80 [2021-05-02 14:44:15,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:44:15,145 INFO L480 AbstractCegarLoop]: Abstraction has 250 states and 307 transitions. [2021-05-02 14:44:15,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 14:44:15,145 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 307 transitions. [2021-05-02 14:44:15,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 14:44:15,146 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:44:15,146 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:44:15,355 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-02 14:44:15,355 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:44:15,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:44:15,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1835066184, now seen corresponding path program 6 times [2021-05-02 14:44:15,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:44:15,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742679869] [2021-05-02 14:44:15,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:44:15,364 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:44:15,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [450942008] [2021-05-02 14:44:15,364 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:44:15,432 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-02 14:44:15,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:44:15,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 14:44:15,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:44:15,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:15,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:15,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:15,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:15,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:15,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:15,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:15,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:15,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:15,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:15,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:15,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:15,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:15,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:15,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:15,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:15,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:15,617 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 58 proven. 10 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-05-02 14:44:15,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:44:15,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742679869] [2021-05-02 14:44:15,617 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:44:15,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450942008] [2021-05-02 14:44:15,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450942008] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:44:15,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:44:15,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 14:44:15,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826644614] [2021-05-02 14:44:15,618 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 14:44:15,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:44:15,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 14:44:15,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:44:15,618 INFO L87 Difference]: Start difference. First operand 250 states and 307 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 14:44:24,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:44:24,141 INFO L93 Difference]: Finished difference Result 298 states and 373 transitions. [2021-05-02 14:44:24,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 14:44:24,142 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 80 [2021-05-02 14:44:24,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:44:24,143 INFO L225 Difference]: With dead ends: 298 [2021-05-02 14:44:24,143 INFO L226 Difference]: Without dead ends: 293 [2021-05-02 14:44:24,143 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 116.6ms TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-05-02 14:44:24,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-05-02 14:44:24,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 281. [2021-05-02 14:44:24,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 171 states have (on average 1.1637426900584795) internal successors, (199), 182 states have internal predecessors, (199), 76 states have call successors, (76), 34 states have call predecessors, (76), 33 states have return successors, (72), 64 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-02 14:44:24,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 347 transitions. [2021-05-02 14:44:24,158 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 347 transitions. Word has length 80 [2021-05-02 14:44:24,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:44:24,158 INFO L480 AbstractCegarLoop]: Abstraction has 281 states and 347 transitions. [2021-05-02 14:44:24,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 14:44:24,158 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 347 transitions. [2021-05-02 14:44:24,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 14:44:24,158 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:44:24,159 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:44:24,364 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-02 14:44:24,365 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:44:24,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:44:24,365 INFO L82 PathProgramCache]: Analyzing trace with hash -60058822, now seen corresponding path program 7 times [2021-05-02 14:44:24,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:44:24,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284449656] [2021-05-02 14:44:24,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:44:24,369 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:44:24,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [361774706] [2021-05-02 14:44:24,370 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:44:24,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:44:24,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 14:44:24,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:44:24,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:24,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:24,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:24,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:24,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:24,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:24,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:24,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:24,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:24,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:24,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:24,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:24,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:24,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:24,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:24,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:24,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:24,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:24,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:24,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:24,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:24,652 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-05-02 14:44:24,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:44:24,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284449656] [2021-05-02 14:44:24,652 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:44:24,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361774706] [2021-05-02 14:44:24,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361774706] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:44:24,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:44:24,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 14:44:24,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869062331] [2021-05-02 14:44:24,653 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 14:44:24,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:44:24,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 14:44:24,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:44:24,653 INFO L87 Difference]: Start difference. First operand 281 states and 347 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 14:44:24,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:44:24,995 INFO L93 Difference]: Finished difference Result 302 states and 374 transitions. [2021-05-02 14:44:24,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 14:44:24,995 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 80 [2021-05-02 14:44:24,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:44:24,996 INFO L225 Difference]: With dead ends: 302 [2021-05-02 14:44:24,996 INFO L226 Difference]: Without dead ends: 300 [2021-05-02 14:44:24,997 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 178.2ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-02 14:44:24,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-05-02 14:44:25,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 288. [2021-05-02 14:44:25,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 176 states have (on average 1.1590909090909092) internal successors, (204), 188 states have internal predecessors, (204), 77 states have call successors, (77), 35 states have call predecessors, (77), 34 states have return successors, (73), 64 states have call predecessors, (73), 73 states have call successors, (73) [2021-05-02 14:44:25,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 354 transitions. [2021-05-02 14:44:25,013 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 354 transitions. Word has length 80 [2021-05-02 14:44:25,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:44:25,013 INFO L480 AbstractCegarLoop]: Abstraction has 288 states and 354 transitions. [2021-05-02 14:44:25,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 14:44:25,014 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 354 transitions. [2021-05-02 14:44:25,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 14:44:25,015 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:44:25,015 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:44:25,231 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-02 14:44:25,231 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:44:25,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:44:25,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1003619460, now seen corresponding path program 8 times [2021-05-02 14:44:25,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:44:25,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704118785] [2021-05-02 14:44:25,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:44:25,239 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:44:25,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [536177079] [2021-05-02 14:44:25,239 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:44:25,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:44:25,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:44:25,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 14:44:25,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:44:25,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:25,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:25,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:25,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:25,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:25,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:25,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:25,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:25,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:25,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:25,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:25,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:25,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:25,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:25,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:25,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:25,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:25,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:25,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:25,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:25,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:25,513 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-05-02 14:44:25,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:44:25,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704118785] [2021-05-02 14:44:25,513 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:44:25,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536177079] [2021-05-02 14:44:25,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536177079] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:44:25,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:44:25,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 14:44:25,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227334228] [2021-05-02 14:44:25,513 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 14:44:25,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:44:25,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 14:44:25,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:44:25,514 INFO L87 Difference]: Start difference. First operand 288 states and 354 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 14:44:25,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:44:25,793 INFO L93 Difference]: Finished difference Result 299 states and 368 transitions. [2021-05-02 14:44:25,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 14:44:25,793 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 80 [2021-05-02 14:44:25,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:44:25,794 INFO L225 Difference]: With dead ends: 299 [2021-05-02 14:44:25,794 INFO L226 Difference]: Without dead ends: 297 [2021-05-02 14:44:25,795 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 154.3ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-02 14:44:25,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-05-02 14:44:25,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 293. [2021-05-02 14:44:25,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 179 states have (on average 1.1564245810055866) internal successors, (207), 192 states have internal predecessors, (207), 78 states have call successors, (78), 36 states have call predecessors, (78), 35 states have return successors, (74), 64 states have call predecessors, (74), 74 states have call successors, (74) [2021-05-02 14:44:25,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 359 transitions. [2021-05-02 14:44:25,833 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 359 transitions. Word has length 80 [2021-05-02 14:44:25,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:44:25,833 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 359 transitions. [2021-05-02 14:44:25,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 14:44:25,834 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 359 transitions. [2021-05-02 14:44:25,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 14:44:25,835 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:44:25,835 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:44:26,048 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-02 14:44:26,049 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:44:26,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:44:26,049 INFO L82 PathProgramCache]: Analyzing trace with hash 771387902, now seen corresponding path program 9 times [2021-05-02 14:44:26,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:44:26,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191419418] [2021-05-02 14:44:26,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:44:26,053 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:44:26,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1483997978] [2021-05-02 14:44:26,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:44:26,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 14:44:26,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:44:26,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 14:44:26,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:44:26,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:26,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:26,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:26,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:26,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:26,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:26,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:26,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:26,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:26,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:26,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:26,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:26,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:26,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:26,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:26,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:26,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:26,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:26,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:26,308 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 55 proven. 13 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-05-02 14:44:26,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:44:26,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191419418] [2021-05-02 14:44:26,308 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:44:26,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483997978] [2021-05-02 14:44:26,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483997978] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:44:26,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:44:26,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 14:44:26,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29986320] [2021-05-02 14:44:26,309 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 14:44:26,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:44:26,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 14:44:26,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:44:26,310 INFO L87 Difference]: Start difference. First operand 293 states and 359 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 14:44:30,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:44:30,610 INFO L93 Difference]: Finished difference Result 316 states and 391 transitions. [2021-05-02 14:44:30,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 14:44:30,611 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 80 [2021-05-02 14:44:30,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:44:30,612 INFO L225 Difference]: With dead ends: 316 [2021-05-02 14:44:30,612 INFO L226 Difference]: Without dead ends: 314 [2021-05-02 14:44:30,613 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 101.6ms TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-05-02 14:44:30,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-05-02 14:44:30,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 283. [2021-05-02 14:44:30,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 175 states have (on average 1.1485714285714286) internal successors, (201), 189 states have internal predecessors, (201), 72 states have call successors, (72), 36 states have call predecessors, (72), 35 states have return successors, (68), 57 states have call predecessors, (68), 68 states have call successors, (68) [2021-05-02 14:44:30,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 341 transitions. [2021-05-02 14:44:30,627 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 341 transitions. Word has length 80 [2021-05-02 14:44:30,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:44:30,627 INFO L480 AbstractCegarLoop]: Abstraction has 283 states and 341 transitions. [2021-05-02 14:44:30,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 14:44:30,627 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 341 transitions. [2021-05-02 14:44:30,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-02 14:44:30,628 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:44:30,628 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:44:30,840 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:44:30,841 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:44:30,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:44:30,841 INFO L82 PathProgramCache]: Analyzing trace with hash 629296923, now seen corresponding path program 3 times [2021-05-02 14:44:30,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:44:30,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455705592] [2021-05-02 14:44:30,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:44:30,845 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:44:30,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2072560512] [2021-05-02 14:44:30,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:44:30,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 14:44:30,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:44:30,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-02 14:44:30,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:44:30,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:30,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:30,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:30,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:30,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:30,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:30,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:30,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:30,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:30,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:31,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:31,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:31,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:31,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:31,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:31,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:31,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:31,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:31,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:31,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:31,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:31,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:31,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:31,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:31,183 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 46 proven. 37 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-05-02 14:44:31,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:44:31,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455705592] [2021-05-02 14:44:31,183 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:44:31,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072560512] [2021-05-02 14:44:31,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072560512] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:44:31,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:44:31,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 14:44:31,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81038571] [2021-05-02 14:44:31,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 14:44:31,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:44:31,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 14:44:31,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-05-02 14:44:31,186 INFO L87 Difference]: Start difference. First operand 283 states and 341 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 14:44:31,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:44:31,505 INFO L93 Difference]: Finished difference Result 318 states and 395 transitions. [2021-05-02 14:44:31,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 14:44:31,509 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) Word has length 85 [2021-05-02 14:44:31,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:44:31,510 INFO L225 Difference]: With dead ends: 318 [2021-05-02 14:44:31,510 INFO L226 Difference]: Without dead ends: 316 [2021-05-02 14:44:31,510 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 142.4ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-05-02 14:44:31,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-05-02 14:44:31,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 294. [2021-05-02 14:44:31,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 182 states have (on average 1.1538461538461537) internal successors, (210), 196 states have internal predecessors, (210), 75 states have call successors, (75), 37 states have call predecessors, (75), 36 states have return successors, (71), 60 states have call predecessors, (71), 71 states have call successors, (71) [2021-05-02 14:44:31,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 356 transitions. [2021-05-02 14:44:31,530 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 356 transitions. Word has length 85 [2021-05-02 14:44:31,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:44:31,530 INFO L480 AbstractCegarLoop]: Abstraction has 294 states and 356 transitions. [2021-05-02 14:44:31,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 14:44:31,530 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 356 transitions. [2021-05-02 14:44:31,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-02 14:44:31,531 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:44:31,531 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:44:31,744 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-02 14:44:31,745 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:44:31,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:44:31,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1330896797, now seen corresponding path program 10 times [2021-05-02 14:44:31,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:44:31,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846641004] [2021-05-02 14:44:31,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:44:31,756 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:44:31,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1173490807] [2021-05-02 14:44:31,756 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:44:31,802 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 14:44:31,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:44:31,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 54 conjunts are in the unsatisfiable core [2021-05-02 14:44:31,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:44:31,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:31,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:31,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:31,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:31,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:31,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:31,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:31,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:31,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:31,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:31,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:31,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:31,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:31,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:31,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:31,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:31,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:31,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:31,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:31,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:31,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:31,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:31,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:31,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:31,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:31,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:31,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:31,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:31,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:31,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:31,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:31,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:31,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:31,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:32,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:32,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,315 WARN L205 SmtUtils]: Spent 7.41 s on a formula simplification that was a NOOP. DAG size: 45 [2021-05-02 14:44:44,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:44,560 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 60 proven. 40 refuted. 4 times theorem prover too weak. 133 trivial. 0 not checked. [2021-05-02 14:44:44,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:44:44,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846641004] [2021-05-02 14:44:44,560 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:44:44,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173490807] [2021-05-02 14:44:44,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173490807] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:44:44,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:44:44,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 14:44:44,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669359055] [2021-05-02 14:44:44,562 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 14:44:44,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:44:44,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 14:44:44,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=148, Unknown=2, NotChecked=0, Total=182 [2021-05-02 14:44:44,563 INFO L87 Difference]: Start difference. First operand 294 states and 356 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2021-05-02 14:44:51,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:44:51,697 INFO L93 Difference]: Finished difference Result 339 states and 418 transitions. [2021-05-02 14:44:51,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 14:44:51,697 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) Word has length 85 [2021-05-02 14:44:51,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:44:51,698 INFO L225 Difference]: With dead ends: 339 [2021-05-02 14:44:51,699 INFO L226 Difference]: Without dead ends: 337 [2021-05-02 14:44:51,699 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 12401.9ms TimeCoverageRelationStatistics Valid=47, Invalid=223, Unknown=2, NotChecked=0, Total=272 [2021-05-02 14:44:51,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-05-02 14:44:51,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 313. [2021-05-02 14:44:51,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 195 states have (on average 1.1487179487179486) internal successors, (224), 209 states have internal predecessors, (224), 78 states have call successors, (78), 40 states have call predecessors, (78), 39 states have return successors, (74), 63 states have call predecessors, (74), 74 states have call successors, (74) [2021-05-02 14:44:51,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 376 transitions. [2021-05-02 14:44:51,723 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 376 transitions. Word has length 85 [2021-05-02 14:44:51,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:44:51,724 INFO L480 AbstractCegarLoop]: Abstraction has 313 states and 376 transitions. [2021-05-02 14:44:51,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2021-05-02 14:44:51,724 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 376 transitions. [2021-05-02 14:44:51,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-02 14:44:51,724 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:44:51,724 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:44:51,940 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-02 14:44:51,940 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:44:51,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:44:51,941 INFO L82 PathProgramCache]: Analyzing trace with hash 148216665, now seen corresponding path program 11 times [2021-05-02 14:44:51,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:44:51,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88219101] [2021-05-02 14:44:51,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:44:51,950 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:44:51,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [332514961] [2021-05-02 14:44:51,950 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:44:52,073 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-02 14:44:52,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:44:52,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-02 14:44:52,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:44:52,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:52,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:52,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:52,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:52,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:52,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:52,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:52,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:52,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:52,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:52,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:52,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:52,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:52,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:52,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:52,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:52,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:52,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:52,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:52,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:52,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:52,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:52,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:52,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:52,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:52,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:52,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:52,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:52,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:52,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:52,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:52,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:52,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:52,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:52,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:52,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:52,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:52,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:52,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:52,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:52,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:52,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:52,371 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 22 proven. 58 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-05-02 14:44:52,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:44:52,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88219101] [2021-05-02 14:44:52,372 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:44:52,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332514961] [2021-05-02 14:44:52,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332514961] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:44:52,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:44:52,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 14:44:52,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897834190] [2021-05-02 14:44:52,373 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 14:44:52,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:44:52,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 14:44:52,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-02 14:44:52,374 INFO L87 Difference]: Start difference. First operand 313 states and 376 transitions. Second operand has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-02 14:44:52,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:44:52,713 INFO L93 Difference]: Finished difference Result 347 states and 428 transitions. [2021-05-02 14:44:52,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 14:44:52,713 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) Word has length 85 [2021-05-02 14:44:52,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:44:52,715 INFO L225 Difference]: With dead ends: 347 [2021-05-02 14:44:52,715 INFO L226 Difference]: Without dead ends: 345 [2021-05-02 14:44:52,715 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 161.5ms TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-05-02 14:44:52,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-05-02 14:44:52,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 313. [2021-05-02 14:44:52,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 195 states have (on average 1.1487179487179486) internal successors, (224), 209 states have internal predecessors, (224), 78 states have call successors, (78), 40 states have call predecessors, (78), 39 states have return successors, (74), 63 states have call predecessors, (74), 74 states have call successors, (74) [2021-05-02 14:44:52,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 376 transitions. [2021-05-02 14:44:52,734 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 376 transitions. Word has length 85 [2021-05-02 14:44:52,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:44:52,734 INFO L480 AbstractCegarLoop]: Abstraction has 313 states and 376 transitions. [2021-05-02 14:44:52,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-02 14:44:52,734 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 376 transitions. [2021-05-02 14:44:52,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-02 14:44:52,735 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:44:52,735 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:44:52,943 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-05-02 14:44:52,943 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:44:52,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:44:52,943 INFO L82 PathProgramCache]: Analyzing trace with hash 849816539, now seen corresponding path program 12 times [2021-05-02 14:44:52,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:44:52,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178133620] [2021-05-02 14:44:52,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:44:52,947 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:44:52,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1970598262] [2021-05-02 14:44:52,948 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:44:53,003 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-02 14:44:53,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:44:53,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 14:44:53,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:44:53,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:53,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:53,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:53,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:53,157 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 46 proven. 38 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-05-02 14:44:53,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:44:53,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178133620] [2021-05-02 14:44:53,157 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:44:53,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970598262] [2021-05-02 14:44:53,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970598262] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:44:53,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:44:53,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 14:44:53,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766513189] [2021-05-02 14:44:53,158 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:44:53,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:44:53,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:44:53,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:44:53,158 INFO L87 Difference]: Start difference. First operand 313 states and 376 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 14:44:55,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:44:55,333 INFO L93 Difference]: Finished difference Result 338 states and 410 transitions. [2021-05-02 14:44:55,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:44:55,334 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 85 [2021-05-02 14:44:55,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:44:55,335 INFO L225 Difference]: With dead ends: 338 [2021-05-02 14:44:55,335 INFO L226 Difference]: Without dead ends: 332 [2021-05-02 14:44:55,335 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 56.1ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:44:55,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-05-02 14:44:55,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 306. [2021-05-02 14:44:55,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 190 states have (on average 1.1210526315789473) internal successors, (213), 206 states have internal predecessors, (213), 75 states have call successors, (75), 41 states have call predecessors, (75), 40 states have return successors, (71), 58 states have call predecessors, (71), 71 states have call successors, (71) [2021-05-02 14:44:55,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 359 transitions. [2021-05-02 14:44:55,359 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 359 transitions. Word has length 85 [2021-05-02 14:44:55,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:44:55,359 INFO L480 AbstractCegarLoop]: Abstraction has 306 states and 359 transitions. [2021-05-02 14:44:55,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 14:44:55,359 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 359 transitions. [2021-05-02 14:44:55,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-02 14:44:55,360 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:44:55,360 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:44:55,572 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:44:55,573 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:44:55,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:44:55,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1358919972, now seen corresponding path program 13 times [2021-05-02 14:44:55,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:44:55,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587023654] [2021-05-02 14:44:55,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:44:55,578 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:44:55,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [996977591] [2021-05-02 14:44:55,578 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:44:55,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:44:55,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-02 14:44:55,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:44:55,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:55,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:55,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:55,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:55,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:55,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:55,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:55,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:55,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:55,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:55,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:55,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:55,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:55,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:55,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:55,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:55,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:55,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:55,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:55,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:55,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:55,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:55,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:55,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:55,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:55,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:55,948 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 24 proven. 67 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2021-05-02 14:44:55,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:44:55,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587023654] [2021-05-02 14:44:55,948 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:44:55,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996977591] [2021-05-02 14:44:55,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996977591] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:44:55,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:44:55,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 14:44:55,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128287059] [2021-05-02 14:44:55,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 14:44:55,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:44:55,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 14:44:55,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-05-02 14:44:55,950 INFO L87 Difference]: Start difference. First operand 306 states and 359 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2021-05-02 14:44:56,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:44:56,338 INFO L93 Difference]: Finished difference Result 339 states and 413 transitions. [2021-05-02 14:44:56,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 14:44:56,339 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) Word has length 90 [2021-05-02 14:44:56,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:44:56,340 INFO L225 Difference]: With dead ends: 339 [2021-05-02 14:44:56,340 INFO L226 Difference]: Without dead ends: 332 [2021-05-02 14:44:56,341 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 172.7ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-05-02 14:44:56,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-05-02 14:44:56,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 327. [2021-05-02 14:44:56,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 203 states have (on average 1.1330049261083743) internal successors, (230), 220 states have internal predecessors, (230), 82 states have call successors, (82), 42 states have call predecessors, (82), 41 states have return successors, (78), 64 states have call predecessors, (78), 78 states have call successors, (78) [2021-05-02 14:44:56,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 390 transitions. [2021-05-02 14:44:56,362 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 390 transitions. Word has length 90 [2021-05-02 14:44:56,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:44:56,362 INFO L480 AbstractCegarLoop]: Abstraction has 327 states and 390 transitions. [2021-05-02 14:44:56,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2021-05-02 14:44:56,362 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 390 transitions. [2021-05-02 14:44:56,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-02 14:44:56,363 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:44:56,363 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:44:56,577 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-05-02 14:44:56,577 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:44:56,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:44:56,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1753286758, now seen corresponding path program 14 times [2021-05-02 14:44:56,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:44:56,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952030506] [2021-05-02 14:44:56,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:44:56,582 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:44:56,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1995963729] [2021-05-02 14:44:56,583 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:44:56,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:44:56,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:44:56,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 72 conjunts are in the unsatisfiable core [2021-05-02 14:44:56,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:44:56,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:56,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:56,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:56,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:56,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:56,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:56,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:56,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:56,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:56,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:56,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:56,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:56,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:56,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:56,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:56,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:56,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:56,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:56,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:56,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:56,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:56,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:56,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:56,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:56,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:56,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:56,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:56,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:56,997 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 63 proven. 82 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-05-02 14:44:56,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:44:56,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952030506] [2021-05-02 14:44:56,998 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:44:56,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995963729] [2021-05-02 14:44:56,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995963729] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:44:56,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:44:56,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 14:44:56,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149798064] [2021-05-02 14:44:56,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 14:44:56,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:44:56,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 14:44:56,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-05-02 14:44:56,999 INFO L87 Difference]: Start difference. First operand 327 states and 390 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 6 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2021-05-02 14:44:57,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:44:57,384 INFO L93 Difference]: Finished difference Result 357 states and 440 transitions. [2021-05-02 14:44:57,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 14:44:57,389 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 6 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 90 [2021-05-02 14:44:57,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:44:57,390 INFO L225 Difference]: With dead ends: 357 [2021-05-02 14:44:57,390 INFO L226 Difference]: Without dead ends: 350 [2021-05-02 14:44:57,391 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 73 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 201.9ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-05-02 14:44:57,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-05-02 14:44:57,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 327. [2021-05-02 14:44:57,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 203 states have (on average 1.1330049261083743) internal successors, (230), 220 states have internal predecessors, (230), 82 states have call successors, (82), 42 states have call predecessors, (82), 41 states have return successors, (78), 64 states have call predecessors, (78), 78 states have call successors, (78) [2021-05-02 14:44:57,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 390 transitions. [2021-05-02 14:44:57,413 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 390 transitions. Word has length 90 [2021-05-02 14:44:57,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:44:57,413 INFO L480 AbstractCegarLoop]: Abstraction has 327 states and 390 transitions. [2021-05-02 14:44:57,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 6 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2021-05-02 14:44:57,414 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 390 transitions. [2021-05-02 14:44:57,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-02 14:44:57,414 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:44:57,414 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:44:57,629 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:44:57,630 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:44:57,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:44:57,630 INFO L82 PathProgramCache]: Analyzing trace with hash 27865438, now seen corresponding path program 15 times [2021-05-02 14:44:57,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:44:57,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307778465] [2021-05-02 14:44:57,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:44:57,634 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:44:57,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [887532453] [2021-05-02 14:44:57,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:44:57,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 14:44:57,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:44:57,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-02 14:44:57,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:44:57,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:57,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:57,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:57,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:57,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:57,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:57,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:57,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:57,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:57,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:57,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:57,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:57,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:57,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:57,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:57,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:57,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:57,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:57,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:57,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:57,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:57,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:57,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:57,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:57,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:57,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:57,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:57,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:57,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:57,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:57,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:57,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:57,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:57,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:57,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:02,727 WARN L205 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-05-02 14:45:02,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:02,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:02,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:02,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:02,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:02,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:02,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:02,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:02,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:02,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:02,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:02,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:02,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:02,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:02,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:02,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:02,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:02,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:02,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:02,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:02,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:02,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:02,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:02,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:02,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:02,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:02,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:02,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:02,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:02,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:02,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:02,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:02,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:02,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:02,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:02,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:02,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:02,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:02,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:02,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:02,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:02,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:02,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:02,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:02,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:02,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:02,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:02,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:03,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:03,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:03,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:03,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:03,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:03,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:03,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:03,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:03,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:03,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:03,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:03,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:03,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:03,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:03,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:03,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:03,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:03,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:03,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:03,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:03,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:03,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:03,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:03,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:03,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:03,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:03,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:03,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:03,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:03,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:03,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:03,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:03,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:03,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:03,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:03,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:03,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:03,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:03,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:03,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:03,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:03,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:03,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:03,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:03,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:03,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:03,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:03,176 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 71 proven. 37 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2021-05-02 14:45:03,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:45:03,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307778465] [2021-05-02 14:45:03,176 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:45:03,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887532453] [2021-05-02 14:45:03,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887532453] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:45:03,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:45:03,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 14:45:03,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858544652] [2021-05-02 14:45:03,176 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 14:45:03,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:45:03,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 14:45:03,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:45:03,177 INFO L87 Difference]: Start difference. First operand 327 states and 390 transitions. Second operand has 15 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 6 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-02 14:45:29,738 WARN L205 SmtUtils]: Spent 10.71 s on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2021-05-02 14:45:40,697 WARN L205 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-05-02 14:45:51,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:45:51,911 INFO L93 Difference]: Finished difference Result 391 states and 503 transitions. [2021-05-02 14:45:51,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 14:45:51,912 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 6 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) Word has length 90 [2021-05-02 14:45:51,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:45:51,912 INFO L225 Difference]: With dead ends: 391 [2021-05-02 14:45:51,912 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 14:45:51,913 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 28296.7ms TimeCoverageRelationStatistics Valid=114, Invalid=638, Unknown=4, NotChecked=0, Total=756 [2021-05-02 14:45:51,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 14:45:51,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 14:45:51,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 14:45:51,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 14:45:51,914 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 90 [2021-05-02 14:45:51,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:45:51,914 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 14:45:51,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 6 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-02 14:45:51,914 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 14:45:51,914 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 14:45:52,120 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-05-02 14:45:52,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 14:45:52,304 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 292 DAG size of output: 259 [2021-05-02 14:45:52,920 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 254 [2021-05-02 14:46:28,225 WARN L205 SmtUtils]: Spent 35.30 s on a formula simplification. DAG size of input: 258 DAG size of output: 34 [2021-05-02 14:46:37,730 WARN L205 SmtUtils]: Spent 9.45 s on a formula simplification. DAG size of input: 228 DAG size of output: 64 [2021-05-02 14:46:50,025 WARN L205 SmtUtils]: Spent 12.29 s on a formula simplification. DAG size of input: 156 DAG size of output: 37 [2021-05-02 14:46:50,742 WARN L205 SmtUtils]: Spent 630.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 37 [2021-05-02 14:46:50,929 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 1 [2021-05-02 14:46:53,181 WARN L205 SmtUtils]: Spent 2.25 s on a formula simplification. DAG size of input: 233 DAG size of output: 40 [2021-05-02 14:46:59,375 WARN L205 SmtUtils]: Spent 6.19 s on a formula simplification. DAG size of input: 257 DAG size of output: 40 [2021-05-02 14:46:59,378 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2021-05-02 14:46:59,378 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 4) no Hoare annotation was computed. [2021-05-02 14:46:59,378 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2021-05-02 14:46:59,378 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 14:46:59,379 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= ~counter~0 |old(~counter~0)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-02 14:46:59,379 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 14:46:59,379 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 14:46:59,379 INFO L194 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: (and (= ~counter~0 0) (exists ((|#t~string4.offset| Int) (|#t~string4.base| Int)) (= (select (select |#memory_int| |#t~string4.base|) (+ |#t~string4.offset| 1)) 0))) [2021-05-02 14:46:59,379 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 14:46:59,379 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 14:46:59,379 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 7 9) the Hoare annotation is: true [2021-05-02 14:46:59,379 INFO L198 CegarLoopUtils]: For program point L8(line 8) no Hoare annotation was computed. [2021-05-02 14:46:59,379 INFO L198 CegarLoopUtils]: For program point L8-2(lines 7 9) no Hoare annotation was computed. [2021-05-02 14:46:59,379 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 7 9) no Hoare annotation was computed. [2021-05-02 14:46:59,379 INFO L198 CegarLoopUtils]: For program point L25(line 25) no Hoare annotation was computed. [2021-05-02 14:46:59,379 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 19 58) no Hoare annotation was computed. [2021-05-02 14:46:59,379 INFO L198 CegarLoopUtils]: For program point L56(line 56) no Hoare annotation was computed. [2021-05-02 14:46:59,379 INFO L194 CegarLoopUtils]: At program point L54(line 54) the Hoare annotation is: (let ((.cse0 (<= 1 main_~x~0)) (.cse1 (<= 1 main_~y~0))) (or (and (= main_~b~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0))) .cse0 .cse1) (forall ((|#t~string4.offset| Int) (|#t~string4.base| Int)) (not (= (select (select |#memory_int| |#t~string4.base|) (+ |#t~string4.offset| 1)) 0))) (not (= |old(~counter~0)| 0)) (and (= main_~q~0 0) .cse0 (= main_~b~0 main_~y~0) .cse1 (= main_~p~0 1) (= main_~s~0 1)))) [2021-05-02 14:46:59,379 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 19 58) no Hoare annotation was computed. [2021-05-02 14:46:59,379 INFO L198 CegarLoopUtils]: For program point L42(lines 42 50) no Hoare annotation was computed. [2021-05-02 14:46:59,379 INFO L194 CegarLoopUtils]: At program point L42-2(lines 34 51) the Hoare annotation is: (let ((.cse0 (<= 1 main_~x~0)) (.cse1 (<= 1 main_~y~0))) (or (and .cse0 .cse1 (< 0 main_~a~0)) (and .cse0 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0))) .cse1 (<= 0 main_~b~0)) (forall ((|#t~string4.offset| Int) (|#t~string4.base| Int)) (not (= (select (select |#memory_int| |#t~string4.base|) (+ |#t~string4.offset| 1)) 0))) (not (= |old(~counter~0)| 0)))) [2021-05-02 14:46:59,379 INFO L194 CegarLoopUtils]: At program point L36(line 36) the Hoare annotation is: (let ((.cse0 (<= 1 main_~x~0)) (.cse1 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0)))) (.cse2 (<= 1 main_~y~0)) (.cse3 (= (+ (* main_~q~0 main_~r~0) 1) (* main_~p~0 main_~s~0)))) (or (forall ((|#t~string4.offset| Int) (|#t~string4.base| Int)) (not (= (select (select |#memory_int| |#t~string4.base|) (+ |#t~string4.offset| 1)) 0))) (not (= |old(~counter~0)| 0)) (and .cse0 .cse1 (<= 0 main_~b~0) .cse2 .cse3) (and .cse0 .cse1 .cse2 .cse3 (< 0 main_~a~0)))) [2021-05-02 14:46:59,379 INFO L198 CegarLoopUtils]: For program point L34-1(lines 34 51) no Hoare annotation was computed. [2021-05-02 14:46:59,379 INFO L194 CegarLoopUtils]: At program point L34-3(lines 34 51) the Hoare annotation is: (let ((.cse0 (<= 1 main_~x~0)) (.cse2 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0)))) (.cse1 (<= 1 main_~y~0))) (or (and .cse0 .cse1 (< 0 main_~a~0)) (and .cse0 .cse2 .cse1 (<= 0 main_~b~0)) (forall ((|#t~string4.offset| Int) (|#t~string4.base| Int)) (not (= (select (select |#memory_int| |#t~string4.base|) (+ |#t~string4.offset| 1)) 0))) (not (= |old(~counter~0)| 0)) (and .cse0 .cse2 (= main_~b~0 main_~a~0) .cse1 (= (+ (* main_~q~0 main_~r~0) 1) (* main_~p~0 main_~s~0))))) [2021-05-02 14:46:59,379 INFO L194 CegarLoopUtils]: At program point mainENTRY(lines 19 58) the Hoare annotation is: (or (forall ((.unlet.12 Int) (.unlet.13 Int)) (not (= (select (select |#memory_int| .unlet.13) (+ .unlet.12 1)) 0))) (= ~counter~0 |old(~counter~0)|) (not (= |old(~counter~0)| 0))) [2021-05-02 14:46:59,380 INFO L194 CegarLoopUtils]: At program point L24(line 24) the Hoare annotation is: (or (forall ((.unlet.8 Int) (.unlet.9 Int)) (not (= (select (select |#memory_int| .unlet.9) (+ .unlet.8 1)) 0))) (= ~counter~0 |old(~counter~0)|) (not (= |old(~counter~0)| 0))) [2021-05-02 14:46:59,380 INFO L194 CegarLoopUtils]: At program point L24-1(line 24) the Hoare annotation is: (or (and (<= 1 main_~x~0) (= ~counter~0 |old(~counter~0)|)) (not (= |old(~counter~0)| 0)) (forall ((.unlet.4 Int) (.unlet.5 Int)) (not (= (select (select |#memory_int| .unlet.5) (+ .unlet.4 1)) 0)))) [2021-05-02 14:46:59,380 INFO L194 CegarLoopUtils]: At program point L55(line 55) the Hoare annotation is: (let ((.cse5 (= main_~s~0 1)) (.cse2 (= (+ main_~q~0 1) 0)) (.cse3 (+ main_~x~0 main_~b~0)) (.cse0 (= main_~b~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0)))) (.cse1 (<= 1 main_~x~0)) (.cse4 (<= 1 main_~y~0))) (or (and .cse0 .cse1 .cse2 (= main_~y~0 .cse3) .cse4 .cse5) (and (= main_~y~0 (+ (* main_~x~0 2) main_~b~0)) .cse0 .cse1 (= (* main_~x~0 (div (* main_~q~0 (- 1)) 2)) main_~x~0) .cse4 (= (mod main_~q~0 2) 0) .cse5) (and (= main_~q~0 0) .cse1 (= main_~b~0 main_~y~0) .cse4 .cse5) (let ((.cse6 (* main_~y~0 2))) (and .cse0 .cse1 .cse2 (= main_~s~0 2) (= .cse6 .cse3) (not (= .cse6 main_~x~0)) (< main_~y~0 main_~x~0) .cse4 (<= main_~x~0 (* 2 main_~y~0)))) (forall ((|#t~string4.offset| Int) (|#t~string4.base| Int)) (not (= (select (select |#memory_int| |#t~string4.base|) (+ |#t~string4.offset| 1)) 0))) (not (= |old(~counter~0)| 0)) (and .cse0 .cse1 .cse4 (= (+ (* main_~q~0 main_~r~0) 1) (* main_~p~0 main_~s~0))))) [2021-05-02 14:46:59,380 INFO L194 CegarLoopUtils]: At program point L53(line 53) the Hoare annotation is: (let ((.cse0 (<= 1 main_~x~0)) (.cse2 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0)))) (.cse3 (= main_~b~0 main_~a~0)) (.cse1 (<= 1 main_~y~0))) (or (and .cse0 .cse1 (< 0 main_~a~0)) (forall ((|#t~string4.offset| Int) (|#t~string4.base| Int)) (not (= (select (select |#memory_int| |#t~string4.base|) (+ |#t~string4.offset| 1)) 0))) (not (= |old(~counter~0)| 0)) (and .cse0 .cse2 .cse3 .cse1 (= (+ (* main_~q~0 main_~r~0) 1) (* main_~p~0 main_~s~0))) (and .cse0 .cse2 .cse3 .cse1 (<= 0 main_~b~0)))) [2021-05-02 14:46:59,380 INFO L198 CegarLoopUtils]: For program point L37(lines 34 51) no Hoare annotation was computed. [2021-05-02 14:46:59,380 INFO L194 CegarLoopUtils]: At program point L35(line 35) the Hoare annotation is: (let ((.cse0 (<= 1 main_~x~0)) (.cse1 (<= 1 main_~y~0))) (or (and .cse0 .cse1 (< 0 main_~a~0)) (and .cse0 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0))) .cse1 (<= 0 main_~b~0)) (forall ((|#t~string4.offset| Int) (|#t~string4.base| Int)) (not (= (select (select |#memory_int| |#t~string4.base|) (+ |#t~string4.offset| 1)) 0))) (not (= |old(~counter~0)| 0)))) [2021-05-02 14:46:59,380 INFO L194 CegarLoopUtils]: At program point L35-1(line 35) the Hoare annotation is: (let ((.cse0 (<= 1 main_~x~0)) (.cse1 (<= 1 main_~y~0)) (.cse2 (= (+ (* main_~q~0 main_~r~0) 1) (* main_~p~0 main_~s~0)))) (or (and .cse0 .cse1 .cse2 (< 0 main_~a~0)) (forall ((|#t~string4.offset| Int) (|#t~string4.base| Int)) (not (= (select (select |#memory_int| |#t~string4.base|) (+ |#t~string4.offset| 1)) 0))) (not (= |old(~counter~0)| 0)) (and .cse0 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0))) (<= 0 main_~b~0) .cse1 .cse2))) [2021-05-02 14:46:59,380 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 10 16) the Hoare annotation is: true [2021-05-02 14:46:59,380 INFO L198 CegarLoopUtils]: For program point L12(lines 12 13) no Hoare annotation was computed. [2021-05-02 14:46:59,380 INFO L198 CegarLoopUtils]: For program point L11(lines 11 14) no Hoare annotation was computed. [2021-05-02 14:46:59,380 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 10 16) no Hoare annotation was computed. [2021-05-02 14:46:59,380 INFO L198 CegarLoopUtils]: For program point L11-2(lines 10 16) no Hoare annotation was computed. [2021-05-02 14:46:59,380 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2021-05-02 14:46:59,385 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[#t~string4.base,QUANTIFIED] [2021-05-02 14:46:59,386 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[#t~string4.offset,QUANTIFIED] [2021-05-02 14:46:59,393 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[#t~string4.base,QUANTIFIED] [2021-05-02 14:46:59,393 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[#t~string4.offset,QUANTIFIED] [2021-05-02 14:46:59,395 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 02:46:59 BoogieIcfgContainer [2021-05-02 14:46:59,395 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 14:46:59,395 INFO L168 Benchmark]: Toolchain (without parser) took 176787.56 ms. Allocated memory was 190.8 MB in the beginning and 333.4 MB in the end (delta: 142.6 MB). Free memory was 155.6 MB in the beginning and 225.1 MB in the end (delta: -69.4 MB). Peak memory consumption was 184.6 MB. Max. memory is 8.0 GB. [2021-05-02 14:46:59,395 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 190.8 MB. Free memory is still 172.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 14:46:59,396 INFO L168 Benchmark]: CACSL2BoogieTranslator took 215.80 ms. Allocated memory is still 190.8 MB. Free memory was 155.5 MB in the beginning and 173.3 MB in the end (delta: -17.9 MB). Peak memory consumption was 10.8 MB. Max. memory is 8.0 GB. [2021-05-02 14:46:59,396 INFO L168 Benchmark]: Boogie Preprocessor took 35.26 ms. Allocated memory is still 190.8 MB. Free memory was 173.3 MB in the beginning and 171.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 14:46:59,396 INFO L168 Benchmark]: RCFGBuilder took 293.00 ms. Allocated memory is still 190.8 MB. Free memory was 171.8 MB in the beginning and 156.0 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-02 14:46:59,396 INFO L168 Benchmark]: TraceAbstraction took 176238.83 ms. Allocated memory was 190.8 MB in the beginning and 333.4 MB in the end (delta: 142.6 MB). Free memory was 155.5 MB in the beginning and 225.1 MB in the end (delta: -69.6 MB). Peak memory consumption was 185.3 MB. Max. memory is 8.0 GB. [2021-05-02 14:46:59,396 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 190.8 MB. Free memory is still 172.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 215.80 ms. Allocated memory is still 190.8 MB. Free memory was 155.5 MB in the beginning and 173.3 MB in the end (delta: -17.9 MB). Peak memory consumption was 10.8 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 35.26 ms. Allocated memory is still 190.8 MB. Free memory was 173.3 MB in the beginning and 171.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 293.00 ms. Allocated memory is still 190.8 MB. Free memory was 171.8 MB in the beginning and 156.0 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 176238.83 ms. Allocated memory was 190.8 MB in the beginning and 333.4 MB in the end (delta: 142.6 MB). Free memory was 155.5 MB in the beginning and 225.1 MB in the end (delta: -69.6 MB). Peak memory consumption was 185.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[#t~string4.base,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[#t~string4.offset,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[#t~string4.base,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[#t~string4.offset,QUANTIFIED] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 108906.7ms, OverallIterations: 31, TraceHistogramMax: 12, EmptinessCheckTime: 27.5ms, AutomataDifference: 75720.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 67256.8ms, InitialAbstractionConstructionTime: 7.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1270 SDtfs, 800 SDslu, 6679 SDs, 0 SdLazy, 7068 SolverSat, 769 SolverUnsat, 19 SolverUnknown, 0 SolverNotchecked, 49362.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1998 GetRequests, 1636 SyntacticMatches, 12 SemanticMatches, 350 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 43165.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=327occurred in iteration=29, InterpolantAutomatonStates: 317, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 458.5ms AutomataMinimizationTime, 31 MinimizatonAttempts, 312 StatesRemovedByMinimization, 26 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 16 LocationsWithAnnotation, 218 PreInvPairs, 408 NumberOfFragments, 708 HoareAnnotationTreeSize, 218 FomulaSimplifications, 17781314 FormulaSimplificationTreeSizeReduction, 794.8ms HoareSimplificationTime, 16 FomulaSimplificationsInter, 3212551 FormulaSimplificationTreeSizeReductionInter, 66437.5ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 268.5ms SsaConstructionTime, 1918.6ms SatisfiabilityAnalysisTime, 23395.7ms InterpolantComputationTime, 1942 NumberOfCodeBlocks, 1810 NumberOfCodeBlocksAsserted, 71 NumberOfCheckSat, 1911 ConstructedInterpolants, 2 QuantifiedInterpolants, 12270 SizeOfPredicates, 151 NumberOfNonLiveVariables, 6082 ConjunctsInSsa, 936 ConjunctsInUnsatCore, 31 InterpolantComputations, 5 PerfectInterpolantSequences, 3162/4000 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 34]: Loop Invariant [2021-05-02 14:46:59,398 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[#t~string4.base,QUANTIFIED] [2021-05-02 14:46:59,398 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[#t~string4.offset,QUANTIFIED] [2021-05-02 14:46:59,399 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[#t~string4.base,QUANTIFIED] [2021-05-02 14:46:59,399 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[#t~string4.offset,QUANTIFIED] Derived loop invariant: ((((1 <= x && 1 <= y) && 0 < a) || (((1 <= x && a == y * r + x * p) && 1 <= y) && 0 <= b)) || (forall #t~string4.offset : int, #t~string4.base : int :: !(unknown-#memory_int-unknown[#t~string4.base][#t~string4.offset + 1] == 0))) || !(\old(counter) == 0) RESULT: Ultimate proved your program to be correct! [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process Received shutdown request...