/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/ps4-ll_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 16:54:42,737 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 16:54:42,739 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 16:54:42,778 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 16:54:42,798 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 16:54:42,800 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 16:54:42,803 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 16:54:42,816 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 16:54:42,818 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 16:54:42,819 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 16:54:42,821 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 16:54:42,826 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 16:54:42,828 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 16:54:42,829 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 16:54:42,830 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 16:54:42,832 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 16:54:42,838 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 16:54:42,846 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 16:54:42,847 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 16:54:42,848 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 16:54:42,852 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 16:54:42,903 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 16:54:42,903 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 16:54:42,906 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 16:54:42,906 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 16:54:42,906 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 16:54:42,906 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 16:54:42,907 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 16:54:42,907 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 16:54:42,907 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 16:54:42,907 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 16:54:42,908 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 16:54:42,908 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 16:54:42,908 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 16:54:42,908 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 16:54:42,908 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 16:54:42,909 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 16:54:42,909 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 16:54:42,909 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 16:54:42,909 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 16:54:42,909 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 16:54:42,909 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 16:54:42,910 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 16:54:42,910 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 16:54:42,910 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 16:54:42,910 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 16:54:42,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 16:54:42,910 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 16:54:42,910 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 16:54:42,911 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 16:54:43,203 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 16:54:43,229 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 16:54:43,231 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 16:54:43,232 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 16:54:43,233 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 16:54:43,234 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound20.c [2021-05-02 16:54:43,298 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/561a7e841/0ec33f6013724b2e90735a08921d5ba8/FLAGe29351e40 [2021-05-02 16:54:43,700 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 16:54:43,700 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound20.c [2021-05-02 16:54:43,706 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/561a7e841/0ec33f6013724b2e90735a08921d5ba8/FLAGe29351e40 [2021-05-02 16:54:44,093 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/561a7e841/0ec33f6013724b2e90735a08921d5ba8 [2021-05-02 16:54:44,095 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 16:54:44,096 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 16:54:44,100 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 16:54:44,100 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 16:54:44,103 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 16:54:44,104 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 04:54:44" (1/1) ... [2021-05-02 16:54:44,105 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@594dd747 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:54:44, skipping insertion in model container [2021-05-02 16:54:44,105 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 04:54:44" (1/1) ... [2021-05-02 16:54:44,111 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 16:54:44,124 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 16:54:44,241 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/ps4-ll_unwindbound20.c[458,471] [2021-05-02 16:54:44,263 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 16:54:44,270 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 16:54:44,283 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/ps4-ll_unwindbound20.c[458,471] [2021-05-02 16:54:44,302 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 16:54:44,316 INFO L208 MainTranslator]: Completed translation [2021-05-02 16:54:44,316 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:54:44 WrapperNode [2021-05-02 16:54:44,316 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 16:54:44,319 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 16:54:44,319 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 16:54:44,320 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 16:54:44,329 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:54:44" (1/1) ... [2021-05-02 16:54:44,330 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:54:44" (1/1) ... [2021-05-02 16:54:44,356 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:54:44" (1/1) ... [2021-05-02 16:54:44,356 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:54:44" (1/1) ... [2021-05-02 16:54:44,360 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:54:44" (1/1) ... [2021-05-02 16:54:44,377 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:54:44" (1/1) ... [2021-05-02 16:54:44,378 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:54:44" (1/1) ... [2021-05-02 16:54:44,380 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 16:54:44,380 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 16:54:44,380 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 16:54:44,381 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 16:54:44,381 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:54:44" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 16:54:44,466 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 16:54:44,466 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 16:54:44,466 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 16:54:44,466 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 16:54:44,467 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 16:54:44,467 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 16:54:44,467 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 16:54:44,467 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 16:54:44,467 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 16:54:44,467 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 16:54:44,467 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-02 16:54:44,467 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 16:54:44,467 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 16:54:44,468 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 16:54:44,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 16:54:44,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 16:54:44,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 16:54:44,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 16:54:44,468 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 16:54:44,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 16:54:44,734 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 16:54:44,734 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 16:54:44,735 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 04:54:44 BoogieIcfgContainer [2021-05-02 16:54:44,735 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 16:54:44,736 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 16:54:44,737 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 16:54:44,739 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 16:54:44,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 04:54:44" (1/3) ... [2021-05-02 16:54:44,740 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@159ef9f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 04:54:44, skipping insertion in model container [2021-05-02 16:54:44,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:54:44" (2/3) ... [2021-05-02 16:54:44,740 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@159ef9f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 04:54:44, skipping insertion in model container [2021-05-02 16:54:44,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 04:54:44" (3/3) ... [2021-05-02 16:54:44,758 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_unwindbound20.c [2021-05-02 16:54:44,765 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 16:54:44,768 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 16:54:44,782 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 16:54:44,798 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 16:54:44,798 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 16:54:44,799 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 16:54:44,799 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 16:54:44,799 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 16:54:44,799 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 16:54:44,799 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 16:54:44,799 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 16:54:44,811 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 16:54:44,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 16:54:44,815 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:54:44,815 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:54:44,816 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:54:44,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:54:44,820 INFO L82 PathProgramCache]: Analyzing trace with hash -2133548928, now seen corresponding path program 1 times [2021-05-02 16:54:44,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:54:44,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117324131] [2021-05-02 16:54:44,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:54:44,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:54:45,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 16:54:45,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:54:45,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:54:45,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:54:45,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117324131] [2021-05-02 16:54:45,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117324131] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 16:54:45,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 16:54:45,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 16:54:45,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47784764] [2021-05-02 16:54:45,070 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 16:54:45,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:54:45,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 16:54:45,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 16:54:45,086 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 16:54:45,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:54:45,170 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2021-05-02 16:54:45,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 16:54:45,173 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 16:54:45,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:54:45,180 INFO L225 Difference]: With dead ends: 41 [2021-05-02 16:54:45,180 INFO L226 Difference]: Without dead ends: 19 [2021-05-02 16:54:45,184 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 16:54:45,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-02 16:54:45,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2021-05-02 16:54:45,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 16:54:45,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-05-02 16:54:45,226 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 11 [2021-05-02 16:54:45,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:54:45,226 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-05-02 16:54:45,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 16:54:45,227 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-05-02 16:54:45,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 16:54:45,228 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:54:45,228 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:54:45,228 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 16:54:45,229 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:54:45,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:54:45,229 INFO L82 PathProgramCache]: Analyzing trace with hash -2118701623, now seen corresponding path program 1 times [2021-05-02 16:54:45,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:54:45,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542193859] [2021-05-02 16:54:45,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:54:45,264 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:54:45,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [141746660] [2021-05-02 16:54:45,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:54:45,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:54:45,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 16:54:45,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:54:45,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:45,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:45,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:45,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:45,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:45,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:54:45,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:54:45,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542193859] [2021-05-02 16:54:45,463 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:54:45,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141746660] [2021-05-02 16:54:45,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141746660] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 16:54:45,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 16:54:45,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 16:54:45,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227298455] [2021-05-02 16:54:45,465 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 16:54:45,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:54:45,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 16:54:45,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 16:54:45,466 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 16:54:45,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:54:45,487 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2021-05-02 16:54:45,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 16:54:45,488 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 16:54:45,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:54:45,490 INFO L225 Difference]: With dead ends: 28 [2021-05-02 16:54:45,491 INFO L226 Difference]: Without dead ends: 20 [2021-05-02 16:54:45,492 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 16:54:45,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-05-02 16:54:45,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-05-02 16:54:45,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 16:54:45,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-05-02 16:54:45,505 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2021-05-02 16:54:45,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:54:45,506 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-05-02 16:54:45,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 16:54:45,506 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-05-02 16:54:45,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 16:54:45,506 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:54:45,507 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:54:45,724 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 16:54:45,724 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:54:45,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:54:45,725 INFO L82 PathProgramCache]: Analyzing trace with hash -2116914163, now seen corresponding path program 1 times [2021-05-02 16:54:45,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:54:45,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732585040] [2021-05-02 16:54:45,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:54:45,732 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:54:45,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1508763670] [2021-05-02 16:54:45,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:54:45,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:54:45,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 16:54:45,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:54:45,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:54:45,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:54:45,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732585040] [2021-05-02 16:54:45,860 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:54:45,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508763670] [2021-05-02 16:54:45,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508763670] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 16:54:45,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 16:54:45,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 16:54:45,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981066161] [2021-05-02 16:54:45,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 16:54:45,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:54:45,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 16:54:45,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 16:54:45,862 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 16:54:45,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:54:45,918 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2021-05-02 16:54:45,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 16:54:45,918 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 16:54:45,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:54:45,919 INFO L225 Difference]: With dead ends: 30 [2021-05-02 16:54:45,919 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 16:54:45,920 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 16:54:45,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 16:54:45,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-02 16:54:45,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 16:54:45,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-05-02 16:54:45,926 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 12 [2021-05-02 16:54:45,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:54:45,926 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-05-02 16:54:45,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 16:54:45,926 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-05-02 16:54:45,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 16:54:45,927 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:54:45,927 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:54:46,144 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:54:46,145 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:54:46,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:54:46,146 INFO L82 PathProgramCache]: Analyzing trace with hash -263585780, now seen corresponding path program 1 times [2021-05-02 16:54:46,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:54:46,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994284753] [2021-05-02 16:54:46,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:54:46,158 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:54:46,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1346260677] [2021-05-02 16:54:46,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:54:46,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:54:46,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 16:54:46,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:54:46,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:46,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:46,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:46,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:46,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:46,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:46,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:46,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:46,280 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:54:46,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:54:46,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994284753] [2021-05-02 16:54:46,281 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:54:46,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346260677] [2021-05-02 16:54:46,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346260677] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:54:46,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:54:46,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 16:54:46,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447350534] [2021-05-02 16:54:46,282 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 16:54:46,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:54:46,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 16:54:46,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 16:54:46,283 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 16:54:46,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:54:46,312 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2021-05-02 16:54:46,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 16:54:46,313 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-02 16:54:46,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:54:46,314 INFO L225 Difference]: With dead ends: 36 [2021-05-02 16:54:46,314 INFO L226 Difference]: Without dead ends: 28 [2021-05-02 16:54:46,314 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 14.6ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 16:54:46,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-02 16:54:46,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-05-02 16:54:46,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 16:54:46,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-05-02 16:54:46,320 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 20 [2021-05-02 16:54:46,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:54:46,320 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-05-02 16:54:46,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 16:54:46,320 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-05-02 16:54:46,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 16:54:46,321 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:54:46,321 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:54:46,528 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:54:46,529 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:54:46,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:54:46,530 INFO L82 PathProgramCache]: Analyzing trace with hash -261798320, now seen corresponding path program 1 times [2021-05-02 16:54:46,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:54:46,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353517630] [2021-05-02 16:54:46,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:54:46,550 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:54:46,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1656298341] [2021-05-02 16:54:46,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:54:46,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:54:46,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 16:54:46,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:54:46,739 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:54:46,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:54:46,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353517630] [2021-05-02 16:54:46,739 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:54:46,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656298341] [2021-05-02 16:54:46,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656298341] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:54:46,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:54:46,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 16:54:46,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410418095] [2021-05-02 16:54:46,740 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 16:54:46,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:54:46,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 16:54:46,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 16:54:46,741 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 16:58:00,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:00,830 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2021-05-02 16:58:00,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 16:58:00,830 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-02 16:58:00,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:00,832 INFO L225 Difference]: With dead ends: 38 [2021-05-02 16:58:00,832 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 16:58:00,833 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 57.1ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-02 16:58:00,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 16:58:00,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 16:58:00,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 16:58:00,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-05-02 16:58:00,839 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 20 [2021-05-02 16:58:00,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:00,839 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-05-02 16:58:00,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 16:58:00,839 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-05-02 16:58:00,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-02 16:58:00,840 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:00,840 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:01,048 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:58:01,051 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:01,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:01,051 INFO L82 PathProgramCache]: Analyzing trace with hash 891414954, now seen corresponding path program 1 times [2021-05-02 16:58:01,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:01,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67935715] [2021-05-02 16:58:01,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:01,060 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:01,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [594805481] [2021-05-02 16:58:01,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:58:01,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:58:01,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 16:58:01,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:01,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:01,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:01,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:01,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:01,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:01,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:01,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:01,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:01,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:01,285 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 16:58:01,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:01,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67935715] [2021-05-02 16:58:01,286 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:01,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594805481] [2021-05-02 16:58:01,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594805481] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:01,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:01,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 16:58:01,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443848364] [2021-05-02 16:58:01,287 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 16:58:01,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:01,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 16:58:01,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 16:58:01,288 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 16:58:01,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:01,386 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2021-05-02 16:58:01,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 16:58:01,387 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2021-05-02 16:58:01,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:01,388 INFO L225 Difference]: With dead ends: 41 [2021-05-02 16:58:01,388 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 16:58:01,389 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 73.8ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-02 16:58:01,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 16:58:01,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-02 16:58:01,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 16:58:01,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-05-02 16:58:01,401 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 26 [2021-05-02 16:58:01,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:01,401 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-05-02 16:58:01,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 16:58:01,402 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-05-02 16:58:01,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 16:58:01,403 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:01,403 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:01,616 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 16:58:01,617 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:01,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:01,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1647059121, now seen corresponding path program 2 times [2021-05-02 16:58:01,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:01,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661543490] [2021-05-02 16:58:01,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:01,626 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:01,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1396952244] [2021-05-02 16:58:01,626 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:58:01,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 16:58:01,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:58:01,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 16:58:01,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:01,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:01,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:01,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:01,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:01,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:01,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:01,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:01,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:01,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:01,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:01,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:01,821 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:58:01,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:01,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661543490] [2021-05-02 16:58:01,821 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:01,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396952244] [2021-05-02 16:58:01,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396952244] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:01,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:01,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 16:58:01,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474575068] [2021-05-02 16:58:01,825 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 16:58:01,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:01,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 16:58:01,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 16:58:01,826 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 16:58:01,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:01,885 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2021-05-02 16:58:01,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 16:58:01,886 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-02 16:58:01,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:01,888 INFO L225 Difference]: With dead ends: 44 [2021-05-02 16:58:01,888 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 16:58:01,889 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 29.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 16:58:01,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 16:58:01,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-05-02 16:58:01,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 16:58:01,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2021-05-02 16:58:01,903 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 28 [2021-05-02 16:58:01,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:01,907 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2021-05-02 16:58:01,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 16:58:01,907 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2021-05-02 16:58:01,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 16:58:01,908 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:01,908 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:02,128 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:58:02,129 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:02,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:02,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1645271661, now seen corresponding path program 2 times [2021-05-02 16:58:02,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:02,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858548506] [2021-05-02 16:58:02,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:02,139 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:02,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [513098201] [2021-05-02 16:58:02,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:58:02,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 16:58:02,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:58:02,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 16:58:02,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:02,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:02,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:02,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:02,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:02,392 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 16:58:02,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:02,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858548506] [2021-05-02 16:58:02,393 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:02,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513098201] [2021-05-02 16:58:02,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513098201] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:02,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:02,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 16:58:02,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236093676] [2021-05-02 16:58:02,394 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 16:58:02,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:02,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 16:58:02,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 16:58:02,394 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 16:58:02,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:02,517 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2021-05-02 16:58:02,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 16:58:02,518 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-02 16:58:02,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:02,521 INFO L225 Difference]: With dead ends: 46 [2021-05-02 16:58:02,521 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 16:58:02,522 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 109.7ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 16:58:02,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 16:58:02,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-02 16:58:02,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 30 states have internal predecessors, (32), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 16:58:02,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2021-05-02 16:58:02,528 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 28 [2021-05-02 16:58:02,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:02,528 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2021-05-02 16:58:02,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 16:58:02,528 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2021-05-02 16:58:02,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 16:58:02,529 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:02,529 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:02,736 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:58:02,737 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:02,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:02,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1036651181, now seen corresponding path program 2 times [2021-05-02 16:58:02,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:02,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717771339] [2021-05-02 16:58:02,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:02,743 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:02,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1106803218] [2021-05-02 16:58:02,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:58:02,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 16:58:02,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:58:02,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 16:58:02,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:02,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:02,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:02,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:02,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:02,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:02,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:02,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:02,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:02,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:02,982 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 16:58:02,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:02,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717771339] [2021-05-02 16:58:02,983 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:02,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106803218] [2021-05-02 16:58:02,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106803218] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:02,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:02,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 16:58:02,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636397450] [2021-05-02 16:58:02,983 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 16:58:02,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:02,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 16:58:02,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-02 16:58:02,984 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 16:58:03,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:03,097 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2021-05-02 16:58:03,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 16:58:03,099 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 34 [2021-05-02 16:58:03,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:03,100 INFO L225 Difference]: With dead ends: 49 [2021-05-02 16:58:03,100 INFO L226 Difference]: Without dead ends: 42 [2021-05-02 16:58:03,100 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 85.0ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 16:58:03,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-02 16:58:03,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-05-02 16:58:03,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 16:58:03,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2021-05-02 16:58:03,107 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 34 [2021-05-02 16:58:03,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:03,107 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2021-05-02 16:58:03,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 16:58:03,107 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2021-05-02 16:58:03,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 16:58:03,108 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:03,108 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:03,327 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 16:58:03,327 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:03,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:03,327 INFO L82 PathProgramCache]: Analyzing trace with hash 486001554, now seen corresponding path program 3 times [2021-05-02 16:58:03,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:03,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545198920] [2021-05-02 16:58:03,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:03,335 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:03,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [470761806] [2021-05-02 16:58:03,335 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 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 16:58:03,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 16:58:03,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:58:03,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 16:58:03,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:03,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:03,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:03,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:03,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:03,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:03,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:03,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:03,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:03,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:03,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:03,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:03,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:03,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:03,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:03,487 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:58:03,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:03,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545198920] [2021-05-02 16:58:03,488 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:03,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470761806] [2021-05-02 16:58:03,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470761806] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:03,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:03,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 16:58:03,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381998645] [2021-05-02 16:58:03,489 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 16:58:03,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:03,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 16:58:03,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 16:58:03,489 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 16:58:03,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:03,592 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2021-05-02 16:58:03,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 16:58:03,592 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2021-05-02 16:58:03,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:03,593 INFO L225 Difference]: With dead ends: 52 [2021-05-02 16:58:03,593 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 16:58:03,594 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 34.0ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-02 16:58:03,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 16:58:03,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-05-02 16:58:03,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 30 states have (on average 1.1) internal successors, (33), 31 states have internal predecessors, (33), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 16:58:03,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2021-05-02 16:58:03,599 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 36 [2021-05-02 16:58:03,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:03,599 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2021-05-02 16:58:03,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 16:58:03,599 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2021-05-02 16:58:03,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 16:58:03,600 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:03,600 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:03,820 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:58:03,821 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:03,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:03,821 INFO L82 PathProgramCache]: Analyzing trace with hash 487789014, now seen corresponding path program 3 times [2021-05-02 16:58:03,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:03,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513992831] [2021-05-02 16:58:03,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:03,828 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:03,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [243369460] [2021-05-02 16:58:03,828 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 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 16:58:03,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 16:58:03,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:58:03,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 16:58:03,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:03,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:03,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:03,970 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 16:58:03,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:03,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513992831] [2021-05-02 16:58:03,971 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:03,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243369460] [2021-05-02 16:58:03,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243369460] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:03,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:03,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 16:58:03,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899917450] [2021-05-02 16:58:03,973 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 16:58:03,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:03,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 16:58:03,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 16:58:03,974 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 16:58:04,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:04,021 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2021-05-02 16:58:04,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 16:58:04,022 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2021-05-02 16:58:04,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:04,024 INFO L225 Difference]: With dead ends: 50 [2021-05-02 16:58:04,024 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 16:58:04,025 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 38.7ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 16:58:04,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 16:58:04,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-05-02 16:58:04,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 16:58:04,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-05-02 16:58:04,031 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 36 [2021-05-02 16:58:04,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:04,032 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-05-02 16:58:04,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 16:58:04,032 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-05-02 16:58:04,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 16:58:04,032 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:04,032 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:04,251 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:58:04,252 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:04,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:04,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1383171920, now seen corresponding path program 3 times [2021-05-02 16:58:04,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:04,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291283936] [2021-05-02 16:58:04,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:04,260 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:04,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [683470365] [2021-05-02 16:58:04,261 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 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 16:58:04,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 16:58:04,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:58:04,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 16:58:04,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:04,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:04,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:04,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:04,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:04,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:04,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:04,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:04,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:04,692 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 16:58:04,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:04,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291283936] [2021-05-02 16:58:04,692 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:04,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683470365] [2021-05-02 16:58:04,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683470365] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:04,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:04,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 16:58:04,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77591249] [2021-05-02 16:58:04,693 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 16:58:04,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:04,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 16:58:04,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-02 16:58:04,694 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 16:58:04,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:04,765 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2021-05-02 16:58:04,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 16:58:04,765 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 42 [2021-05-02 16:58:04,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:04,767 INFO L225 Difference]: With dead ends: 52 [2021-05-02 16:58:04,767 INFO L226 Difference]: Without dead ends: 47 [2021-05-02 16:58:04,767 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 61.1ms TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-02 16:58:04,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-02 16:58:04,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-05-02 16:58:04,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 16:58:04,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2021-05-02 16:58:04,780 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 42 [2021-05-02 16:58:04,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:04,780 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2021-05-02 16:58:04,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 16:58:04,780 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2021-05-02 16:58:04,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 16:58:04,785 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:04,785 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:04,992 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 16:58:04,992 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:04,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:04,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1386691371, now seen corresponding path program 4 times [2021-05-02 16:58:04,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:04,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270596724] [2021-05-02 16:58:04,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:05,021 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:05,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2086152790] [2021-05-02 16:58:05,022 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 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 16:58:05,081 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 16:58:05,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:58:05,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 16:58:05,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:05,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:05,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:05,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:05,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:05,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:05,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:05,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:05,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:05,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:05,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:05,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:05,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:05,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:05,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:05,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:05,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:05,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:05,203 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:58:05,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:05,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270596724] [2021-05-02 16:58:05,203 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:05,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086152790] [2021-05-02 16:58:05,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086152790] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:05,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:05,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 16:58:05,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680158396] [2021-05-02 16:58:05,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 16:58:05,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:05,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 16:58:05,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 16:58:05,205 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 16:58:05,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:05,282 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2021-05-02 16:58:05,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 16:58:05,283 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 44 [2021-05-02 16:58:05,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:05,283 INFO L225 Difference]: With dead ends: 58 [2021-05-02 16:58:05,283 INFO L226 Difference]: Without dead ends: 53 [2021-05-02 16:58:05,284 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 49.2ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-05-02 16:58:05,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-02 16:58:05,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-05-02 16:58:05,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 states have internal predecessors, (40), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 16:58:05,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2021-05-02 16:58:05,292 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 44 [2021-05-02 16:58:05,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:05,293 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2021-05-02 16:58:05,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 16:58:05,293 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2021-05-02 16:58:05,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 16:58:05,293 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:05,294 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:05,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 16:58:05,500 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:05,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:05,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1037185971, now seen corresponding path program 4 times [2021-05-02 16:58:05,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:05,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880720891] [2021-05-02 16:58:05,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:05,506 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:05,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [528062946] [2021-05-02 16:58:05,506 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 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 16:58:05,584 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 16:58:05,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:58:05,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 16:58:05,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:05,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:05,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:05,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:05,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:05,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:05,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:05,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:05,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:05,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:05,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:05,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:05,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:05,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:05,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:05,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:05,778 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 9 proven. 53 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 16:58:05,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:05,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880720891] [2021-05-02 16:58:05,779 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:05,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528062946] [2021-05-02 16:58:05,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528062946] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:05,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:05,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 16:58:05,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185942510] [2021-05-02 16:58:05,780 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 16:58:05,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:05,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 16:58:05,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-05-02 16:58:05,780 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 16:58:05,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:05,911 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2021-05-02 16:58:05,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 16:58:05,912 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 50 [2021-05-02 16:58:05,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:05,913 INFO L225 Difference]: With dead ends: 60 [2021-05-02 16:58:05,913 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 16:58:05,914 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 111.9ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-02 16:58:05,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 16:58:05,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-05-02 16:58:05,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 16:58:05,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2021-05-02 16:58:05,919 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 50 [2021-05-02 16:58:05,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:05,919 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2021-05-02 16:58:05,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 16:58:05,919 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2021-05-02 16:58:05,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-02 16:58:05,920 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:05,920 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:06,129 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 16:58:06,129 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:06,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:06,129 INFO L82 PathProgramCache]: Analyzing trace with hash 999934744, now seen corresponding path program 5 times [2021-05-02 16:58:06,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:06,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985741638] [2021-05-02 16:58:06,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:06,134 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:06,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [725297226] [2021-05-02 16:58:06,134 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 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 16:58:06,208 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-02 16:58:06,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:58:06,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 16:58:06,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:06,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:06,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:06,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:06,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:06,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:06,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:06,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:06,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:06,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:06,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:06,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:06,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:06,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:06,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:06,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:06,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:06,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:06,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:06,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:06,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:06,339 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:58:06,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:06,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985741638] [2021-05-02 16:58:06,340 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:06,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725297226] [2021-05-02 16:58:06,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725297226] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:06,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:06,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 16:58:06,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848724739] [2021-05-02 16:58:06,340 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 16:58:06,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:06,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 16:58:06,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 16:58:06,341 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 16:58:06,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:06,445 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2021-05-02 16:58:06,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 16:58:06,446 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 52 [2021-05-02 16:58:06,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:06,446 INFO L225 Difference]: With dead ends: 66 [2021-05-02 16:58:06,446 INFO L226 Difference]: Without dead ends: 61 [2021-05-02 16:58:06,447 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 63.6ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-05-02 16:58:06,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-02 16:58:06,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-05-02 16:58:06,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 9 states have call successors, (9), 9 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 16:58:06,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2021-05-02 16:58:06,453 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 52 [2021-05-02 16:58:06,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:06,453 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2021-05-02 16:58:06,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 16:58:06,453 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2021-05-02 16:58:06,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-02 16:58:06,454 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:06,454 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:06,676 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:58:06,676 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:06,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:06,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1795671114, now seen corresponding path program 5 times [2021-05-02 16:58:06,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:06,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933509238] [2021-05-02 16:58:06,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:06,682 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:06,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1931202098] [2021-05-02 16:58:06,682 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 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 16:58:06,778 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-02 16:58:06,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:58:06,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 16:58:06,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:06,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:06,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:06,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:06,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:06,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:06,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:06,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:06,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:06,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:06,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:06,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:06,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:06,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:06,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:06,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:06,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:06,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:07,015 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 14 proven. 73 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-05-02 16:58:07,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:07,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933509238] [2021-05-02 16:58:07,016 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:07,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931202098] [2021-05-02 16:58:07,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931202098] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:07,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:07,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 16:58:07,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768293345] [2021-05-02 16:58:07,016 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 16:58:07,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:07,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 16:58:07,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-05-02 16:58:07,017 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 16:58:07,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:07,196 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2021-05-02 16:58:07,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 16:58:07,196 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 58 [2021-05-02 16:58:07,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:07,200 INFO L225 Difference]: With dead ends: 68 [2021-05-02 16:58:07,200 INFO L226 Difference]: Without dead ends: 63 [2021-05-02 16:58:07,201 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 141.7ms TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-05-02 16:58:07,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-05-02 16:58:07,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-05-02 16:58:07,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 45 states have internal predecessors, (47), 10 states have call successors, (10), 9 states have call predecessors, (10), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 16:58:07,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2021-05-02 16:58:07,208 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 58 [2021-05-02 16:58:07,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:07,209 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2021-05-02 16:58:07,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 16:58:07,209 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2021-05-02 16:58:07,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-02 16:58:07,209 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:07,210 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:07,424 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:58:07,425 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:07,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:07,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1633541723, now seen corresponding path program 6 times [2021-05-02 16:58:07,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:07,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475235782] [2021-05-02 16:58:07,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:07,430 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:07,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1651883933] [2021-05-02 16:58:07,430 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 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 16:58:07,654 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-02 16:58:07,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:58:07,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 16:58:07,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:07,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:07,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:07,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:07,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:07,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:07,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:07,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:07,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:07,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:07,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:07,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:07,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:07,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:07,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:07,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:07,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:07,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:07,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:07,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:07,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:07,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:07,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:07,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:07,819 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:58:07,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:07,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475235782] [2021-05-02 16:58:07,819 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:07,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651883933] [2021-05-02 16:58:07,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651883933] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:07,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:07,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 16:58:07,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621919441] [2021-05-02 16:58:07,822 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 16:58:07,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:07,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 16:58:07,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 16:58:07,825 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 9 states have call successors, (9), 9 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 16:58:08,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:08,049 INFO L93 Difference]: Finished difference Result 74 states and 75 transitions. [2021-05-02 16:58:08,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 16:58:08,049 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 9 states have call successors, (9), 9 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 60 [2021-05-02 16:58:08,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:08,050 INFO L225 Difference]: With dead ends: 74 [2021-05-02 16:58:08,050 INFO L226 Difference]: Without dead ends: 69 [2021-05-02 16:58:08,050 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 82.6ms TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-05-02 16:58:08,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-02 16:58:08,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-05-02 16:58:08,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 50 states have (on average 1.04) internal successors, (52), 50 states have internal predecessors, (52), 10 states have call successors, (10), 10 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 16:58:08,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2021-05-02 16:58:08,055 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 60 [2021-05-02 16:58:08,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:08,055 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2021-05-02 16:58:08,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 9 states have call successors, (9), 9 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 16:58:08,055 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2021-05-02 16:58:08,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-02 16:58:08,056 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:08,056 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:08,262 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:58:08,262 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:08,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:08,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1180930233, now seen corresponding path program 6 times [2021-05-02 16:58:08,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:08,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111366475] [2021-05-02 16:58:08,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:08,267 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:08,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1639935348] [2021-05-02 16:58:08,268 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 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 16:58:08,512 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-02 16:58:08,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:58:08,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-02 16:58:08,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:08,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:08,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:08,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:08,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:08,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:08,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:08,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:08,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:08,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:08,723 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 22 proven. 94 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-05-02 16:58:08,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:08,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111366475] [2021-05-02 16:58:08,723 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:08,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639935348] [2021-05-02 16:58:08,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639935348] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:08,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:08,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 16:58:08,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828396565] [2021-05-02 16:58:08,724 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 16:58:08,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:08,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 16:58:08,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2021-05-02 16:58:08,724 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 9 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 16:58:08,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:08,916 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2021-05-02 16:58:08,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 16:58:08,916 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 9 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 66 [2021-05-02 16:58:08,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:08,917 INFO L225 Difference]: With dead ends: 76 [2021-05-02 16:58:08,917 INFO L226 Difference]: Without dead ends: 71 [2021-05-02 16:58:08,917 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 133.5ms TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-05-02 16:58:08,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-05-02 16:58:08,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-05-02 16:58:08,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 51 states have internal predecessors, (53), 11 states have call successors, (11), 10 states have call predecessors, (11), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 16:58:08,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2021-05-02 16:58:08,923 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 66 [2021-05-02 16:58:08,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:08,923 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2021-05-02 16:58:08,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 9 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 16:58:08,923 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2021-05-02 16:58:08,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 16:58:08,924 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:08,924 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:09,125 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-02 16:58:09,125 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:09,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:09,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1699217054, now seen corresponding path program 7 times [2021-05-02 16:58:09,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:09,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169370106] [2021-05-02 16:58:09,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:09,135 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:09,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2084783705] [2021-05-02 16:58:09,135 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 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 16:58:09,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:58:09,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 16:58:09,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:09,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:09,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:09,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:09,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:09,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:09,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:09,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:09,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:09,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:09,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:09,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:09,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:09,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:09,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:09,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:09,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:09,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:09,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:09,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:09,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:09,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:09,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:09,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:09,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:09,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:09,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:09,373 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:58:09,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:09,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169370106] [2021-05-02 16:58:09,374 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:09,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084783705] [2021-05-02 16:58:09,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084783705] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:09,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:09,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 16:58:09,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136910518] [2021-05-02 16:58:09,376 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 16:58:09,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:09,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 16:58:09,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-02 16:58:09,377 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 10 states have call successors, (10), 10 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 16:58:09,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:09,527 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2021-05-02 16:58:09,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 16:58:09,528 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 10 states have call successors, (10), 10 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 68 [2021-05-02 16:58:09,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:09,529 INFO L225 Difference]: With dead ends: 82 [2021-05-02 16:58:09,529 INFO L226 Difference]: Without dead ends: 77 [2021-05-02 16:58:09,529 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 110.1ms TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2021-05-02 16:58:09,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-02 16:58:09,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-05-02 16:58:09,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 states have internal predecessors, (58), 11 states have call successors, (11), 11 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 16:58:09,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2021-05-02 16:58:09,536 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 68 [2021-05-02 16:58:09,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:09,537 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2021-05-02 16:58:09,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 10 states have call successors, (10), 10 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 16:58:09,537 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2021-05-02 16:58:09,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 16:58:09,538 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:09,538 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:09,752 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-02 16:58:09,753 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:09,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:09,753 INFO L82 PathProgramCache]: Analyzing trace with hash -763940164, now seen corresponding path program 7 times [2021-05-02 16:58:09,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:09,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807705385] [2021-05-02 16:58:09,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:09,758 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:09,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1672185537] [2021-05-02 16:58:09,758 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 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 16:58:10,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:58:10,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-02 16:58:10,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:10,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:10,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:10,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:10,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:10,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:10,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:10,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:10,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:10,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:10,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:10,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:10,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:10,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:10,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:10,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:10,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:10,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:10,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:10,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:10,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:10,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:10,782 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 15 proven. 134 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-05-02 16:58:10,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:10,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807705385] [2021-05-02 16:58:10,782 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:10,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672185537] [2021-05-02 16:58:10,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672185537] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:10,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:10,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 16:58:10,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018651086] [2021-05-02 16:58:10,783 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 16:58:10,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:10,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 16:58:10,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-05-02 16:58:10,784 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 10 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 16:58:10,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:10,982 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2021-05-02 16:58:10,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 16:58:10,983 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 10 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 74 [2021-05-02 16:58:10,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:10,983 INFO L225 Difference]: With dead ends: 84 [2021-05-02 16:58:10,983 INFO L226 Difference]: Without dead ends: 79 [2021-05-02 16:58:10,984 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 336.9ms TimeCoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-05-02 16:58:10,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-05-02 16:58:10,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-05-02 16:58:10,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 57 states have internal predecessors, (59), 12 states have call successors, (12), 11 states have call predecessors, (12), 9 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 16:58:10,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2021-05-02 16:58:10,990 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 74 [2021-05-02 16:58:10,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:10,990 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2021-05-02 16:58:10,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 10 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 16:58:10,991 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2021-05-02 16:58:10,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-02 16:58:10,991 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:10,991 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:11,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-02 16:58:11,196 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:11,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:11,196 INFO L82 PathProgramCache]: Analyzing trace with hash 989539297, now seen corresponding path program 8 times [2021-05-02 16:58:11,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:11,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822162267] [2021-05-02 16:58:11,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:11,201 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:11,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1542503872] [2021-05-02 16:58:11,202 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 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 16:58:11,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 16:58:11,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:58:11,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 16:58:11,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:11,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:11,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:11,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:11,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:11,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:11,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:11,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:11,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:11,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:11,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:11,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:11,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:11,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:11,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:11,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:11,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:11,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:11,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:11,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:11,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:11,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:11,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:11,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:11,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:11,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:11,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:11,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:11,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:11,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:11,465 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:58:11,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:11,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822162267] [2021-05-02 16:58:11,466 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:11,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542503872] [2021-05-02 16:58:11,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542503872] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:11,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:11,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 16:58:11,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139507947] [2021-05-02 16:58:11,467 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 16:58:11,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:11,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 16:58:11,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 16:58:11,468 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 11 states have call successors, (11), 11 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 16:58:11,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:11,974 INFO L93 Difference]: Finished difference Result 90 states and 91 transitions. [2021-05-02 16:58:11,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 16:58:11,975 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 11 states have call successors, (11), 11 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 76 [2021-05-02 16:58:11,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:11,976 INFO L225 Difference]: With dead ends: 90 [2021-05-02 16:58:11,976 INFO L226 Difference]: Without dead ends: 85 [2021-05-02 16:58:11,976 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 127.9ms TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2021-05-02 16:58:11,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-05-02 16:58:11,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-05-02 16:58:11,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 62 states have (on average 1.032258064516129) internal successors, (64), 62 states have internal predecessors, (64), 12 states have call successors, (12), 12 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 16:58:11,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2021-05-02 16:58:11,982 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 76 [2021-05-02 16:58:11,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:11,983 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2021-05-02 16:58:11,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 11 states have call successors, (11), 11 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 16:58:11,983 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2021-05-02 16:58:11,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-02 16:58:11,983 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:11,983 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:12,207 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-02 16:58:12,208 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:12,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:12,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1500110401, now seen corresponding path program 8 times [2021-05-02 16:58:12,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:12,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933462362] [2021-05-02 16:58:12,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:12,214 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:12,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [490633334] [2021-05-02 16:58:12,214 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 16:58:12,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 16:58:12,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:58:12,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-02 16:58:12,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:12,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:12,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:12,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:12,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:12,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:12,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:12,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:12,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:12,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:12,982 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 17 proven. 169 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-05-02 16:58:12,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:12,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933462362] [2021-05-02 16:58:12,982 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:12,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490633334] [2021-05-02 16:58:12,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490633334] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:12,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:12,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 16:58:12,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470596293] [2021-05-02 16:58:12,984 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 16:58:12,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:12,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 16:58:12,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2021-05-02 16:58:12,985 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 16 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 11 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 16:58:13,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:13,245 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2021-05-02 16:58:13,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 16:58:13,245 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 11 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 82 [2021-05-02 16:58:13,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:13,246 INFO L225 Difference]: With dead ends: 92 [2021-05-02 16:58:13,246 INFO L226 Difference]: Without dead ends: 87 [2021-05-02 16:58:13,246 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 173.7ms TimeCoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-05-02 16:58:13,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-05-02 16:58:13,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-05-02 16:58:13,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 63 states have internal predecessors, (65), 13 states have call successors, (13), 12 states have call predecessors, (13), 10 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 16:58:13,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2021-05-02 16:58:13,252 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 82 [2021-05-02 16:58:13,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:13,253 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2021-05-02 16:58:13,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 11 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 16:58:13,253 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2021-05-02 16:58:13,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-05-02 16:58:13,254 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:13,254 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:13,454 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-02 16:58:13,454 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:13,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:13,455 INFO L82 PathProgramCache]: Analyzing trace with hash -2095421916, now seen corresponding path program 9 times [2021-05-02 16:58:13,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:13,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595023866] [2021-05-02 16:58:13,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:13,460 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:13,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [999338052] [2021-05-02 16:58:13,460 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 16:58:13,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-02 16:58:13,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:58:13,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 16:58:13,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:13,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:13,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:13,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:13,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:13,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:13,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:13,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:13,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:13,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:13,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:13,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:13,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:13,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:13,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:13,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:13,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:14,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:14,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:14,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:14,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:14,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:14,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:14,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:14,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:14,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:14,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:14,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:14,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:14,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:14,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:14,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:14,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:14,128 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 18 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:58:14,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:14,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595023866] [2021-05-02 16:58:14,129 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:14,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999338052] [2021-05-02 16:58:14,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999338052] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:14,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:14,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 16:58:14,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441712396] [2021-05-02 16:58:14,129 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 16:58:14,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:14,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 16:58:14,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-02 16:58:14,130 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 12 states have call successors, (12), 12 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 16:58:14,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:14,377 INFO L93 Difference]: Finished difference Result 98 states and 99 transitions. [2021-05-02 16:58:14,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 16:58:14,377 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 12 states have call successors, (12), 12 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 84 [2021-05-02 16:58:14,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:14,378 INFO L225 Difference]: With dead ends: 98 [2021-05-02 16:58:14,378 INFO L226 Difference]: Without dead ends: 93 [2021-05-02 16:58:14,378 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 151.0ms TimeCoverageRelationStatistics Valid=176, Invalid=286, Unknown=0, NotChecked=0, Total=462 [2021-05-02 16:58:14,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-02 16:58:14,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-05-02 16:58:14,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 16:58:14,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2021-05-02 16:58:14,384 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 84 [2021-05-02 16:58:14,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:14,385 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2021-05-02 16:58:14,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 12 states have call successors, (12), 12 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 16:58:14,385 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2021-05-02 16:58:14,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-02 16:58:14,385 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:14,386 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:14,589 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:58:14,590 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:14,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:14,590 INFO L82 PathProgramCache]: Analyzing trace with hash 488857026, now seen corresponding path program 9 times [2021-05-02 16:58:14,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:14,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788992094] [2021-05-02 16:58:14,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:14,597 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:14,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1479300057] [2021-05-02 16:58:14,597 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 16:58:15,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-02 16:58:15,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:58:15,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 66 conjunts are in the unsatisfiable core [2021-05-02 16:58:15,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:15,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:15,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:15,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:15,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:15,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:15,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:15,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:15,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:15,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:15,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:15,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:15,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:15,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:15,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:15,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:15,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:15,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:15,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:15,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:15,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:15,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:15,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:15,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:15,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:15,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:15,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:15,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:15,651 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 59 proven. 204 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-05-02 16:58:15,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:15,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788992094] [2021-05-02 16:58:15,651 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:15,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479300057] [2021-05-02 16:58:15,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479300057] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:15,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:15,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-02 16:58:15,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770725070] [2021-05-02 16:58:15,651 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 16:58:15,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:15,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 16:58:15,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-05-02 16:58:15,652 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 16 states have internal predecessors, (42), 12 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 16:58:17,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:17,450 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2021-05-02 16:58:17,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 16:58:17,450 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 16 states have internal predecessors, (42), 12 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 90 [2021-05-02 16:58:17,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:17,451 INFO L225 Difference]: With dead ends: 100 [2021-05-02 16:58:17,451 INFO L226 Difference]: Without dead ends: 95 [2021-05-02 16:58:17,452 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 444.1ms TimeCoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-05-02 16:58:17,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-05-02 16:58:17,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-05-02 16:58:17,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 states have internal predecessors, (71), 14 states have call successors, (14), 13 states have call predecessors, (14), 11 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 16:58:17,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2021-05-02 16:58:17,458 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 90 [2021-05-02 16:58:17,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:17,459 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2021-05-02 16:58:17,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 16 states have internal predecessors, (42), 12 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 16:58:17,459 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2021-05-02 16:58:17,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 16:58:17,460 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:17,460 INFO L523 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:17,664 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-05-02 16:58:17,665 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:17,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:17,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1958171289, now seen corresponding path program 10 times [2021-05-02 16:58:17,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:17,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190762855] [2021-05-02 16:58:17,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:17,670 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:17,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [438150426] [2021-05-02 16:58:17,671 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 16:58:18,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 16:58:18,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:58:18,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 16:58:18,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:18,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:18,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:18,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:18,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:18,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:18,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:18,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:18,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:18,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:18,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:18,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:18,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:18,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:18,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:18,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:18,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:18,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:18,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:18,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:18,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:18,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:18,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:18,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:18,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:18,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:18,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:18,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:18,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:18,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:18,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:18,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:18,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:18,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:18,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:18,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:18,797 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:58:18,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:18,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190762855] [2021-05-02 16:58:18,797 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:18,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438150426] [2021-05-02 16:58:18,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438150426] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:18,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:18,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 16:58:18,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256021631] [2021-05-02 16:58:18,798 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 16:58:18,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:18,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 16:58:18,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-02 16:58:18,798 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 16:58:20,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:20,296 INFO L93 Difference]: Finished difference Result 106 states and 107 transitions. [2021-05-02 16:58:20,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 16:58:20,296 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 92 [2021-05-02 16:58:20,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:20,297 INFO L225 Difference]: With dead ends: 106 [2021-05-02 16:58:20,297 INFO L226 Difference]: Without dead ends: 101 [2021-05-02 16:58:20,298 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 206.0ms TimeCoverageRelationStatistics Valid=210, Invalid=342, Unknown=0, NotChecked=0, Total=552 [2021-05-02 16:58:20,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-05-02 16:58:20,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-05-02 16:58:20,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 74 states have (on average 1.027027027027027) internal successors, (76), 74 states have internal predecessors, (76), 14 states have call successors, (14), 14 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 16:58:20,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2021-05-02 16:58:20,306 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 92 [2021-05-02 16:58:20,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:20,307 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2021-05-02 16:58:20,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 16:58:20,307 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2021-05-02 16:58:20,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-02 16:58:20,308 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:20,308 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:20,513 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:58:20,513 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:20,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:20,514 INFO L82 PathProgramCache]: Analyzing trace with hash 2105665221, now seen corresponding path program 10 times [2021-05-02 16:58:20,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:20,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559112762] [2021-05-02 16:58:20,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:20,527 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:20,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [838688247] [2021-05-02 16:58:20,528 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 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 16:58:21,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 16:58:21,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:58:21,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 56 conjunts are in the unsatisfiable core [2021-05-02 16:58:21,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:21,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:21,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:21,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:21,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:21,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:21,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:21,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:21,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:21,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:21,452 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 21 proven. 251 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-05-02 16:58:21,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:21,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559112762] [2021-05-02 16:58:21,453 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:21,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838688247] [2021-05-02 16:58:21,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838688247] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:21,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:21,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 16:58:21,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945711251] [2021-05-02 16:58:21,454 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 16:58:21,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:21,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 16:58:21,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-02 16:58:21,454 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 18 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 13 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 16:58:21,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:21,850 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2021-05-02 16:58:21,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 16:58:21,850 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 13 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 98 [2021-05-02 16:58:21,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:21,851 INFO L225 Difference]: With dead ends: 108 [2021-05-02 16:58:21,851 INFO L226 Difference]: Without dead ends: 103 [2021-05-02 16:58:21,852 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 260.0ms TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-05-02 16:58:21,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-05-02 16:58:21,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-05-02 16:58:21,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 75 states have internal predecessors, (77), 15 states have call successors, (15), 14 states have call predecessors, (15), 12 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 16:58:21,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2021-05-02 16:58:21,858 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 98 [2021-05-02 16:58:21,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:21,858 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2021-05-02 16:58:21,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 13 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 16:58:21,859 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2021-05-02 16:58:21,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-02 16:58:21,859 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:21,859 INFO L523 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:22,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-02 16:58:22,064 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:22,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:22,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1311310250, now seen corresponding path program 11 times [2021-05-02 16:58:22,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:22,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646581347] [2021-05-02 16:58:22,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:22,070 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:22,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [42141083] [2021-05-02 16:58:22,070 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 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 16:58:23,337 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-05-02 16:58:23,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:58:23,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 16:58:23,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:23,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:23,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:23,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:23,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:23,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:23,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:23,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:23,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:23,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:23,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:23,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:23,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:23,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:23,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:23,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:23,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:23,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:23,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:23,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:23,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:23,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:23,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:23,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:23,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:23,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:23,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:23,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:23,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:23,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:23,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:23,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:23,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:23,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:23,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:23,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:23,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:23,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:23,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:23,624 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 22 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:58:23,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:23,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646581347] [2021-05-02 16:58:23,624 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:23,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42141083] [2021-05-02 16:58:23,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42141083] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:23,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:23,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 16:58:23,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808262363] [2021-05-02 16:58:23,625 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 16:58:23,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:23,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 16:58:23,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-02 16:58:23,626 INFO L87 Difference]: Start difference. First operand 103 states and 105 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 14 states have internal predecessors, (74), 14 states have call successors, (14), 14 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 16:58:24,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:24,007 INFO L93 Difference]: Finished difference Result 114 states and 115 transitions. [2021-05-02 16:58:24,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-02 16:58:24,008 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 14 states have internal predecessors, (74), 14 states have call successors, (14), 14 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 100 [2021-05-02 16:58:24,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:24,009 INFO L225 Difference]: With dead ends: 114 [2021-05-02 16:58:24,009 INFO L226 Difference]: Without dead ends: 109 [2021-05-02 16:58:24,009 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 230.4ms TimeCoverageRelationStatistics Valid=247, Invalid=403, Unknown=0, NotChecked=0, Total=650 [2021-05-02 16:58:24,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-02 16:58:24,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-05-02 16:58:24,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 80 states have (on average 1.025) internal successors, (82), 80 states have internal predecessors, (82), 15 states have call successors, (15), 15 states have call predecessors, (15), 13 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 16:58:24,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2021-05-02 16:58:24,016 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 100 [2021-05-02 16:58:24,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:24,016 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2021-05-02 16:58:24,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 14 states have internal predecessors, (74), 14 states have call successors, (14), 14 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 16:58:24,016 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2021-05-02 16:58:24,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-05-02 16:58:24,017 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:24,017 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:24,218 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-02 16:58:24,218 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:24,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:24,218 INFO L82 PathProgramCache]: Analyzing trace with hash -65749816, now seen corresponding path program 11 times [2021-05-02 16:58:24,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:24,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491816222] [2021-05-02 16:58:24,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:24,223 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:24,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1458743963] [2021-05-02 16:58:24,224 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 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 16:58:25,083 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-05-02 16:58:25,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:58:25,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 60 conjunts are in the unsatisfiable core [2021-05-02 16:58:25,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:25,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:25,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:25,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:25,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:25,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:25,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:25,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:25,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:25,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:25,449 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 26 proven. 295 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-05-02 16:58:25,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:25,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491816222] [2021-05-02 16:58:25,449 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:25,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458743963] [2021-05-02 16:58:25,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458743963] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:25,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:25,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-02 16:58:25,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481604743] [2021-05-02 16:58:25,450 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 16:58:25,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:25,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 16:58:25,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-02 16:58:25,450 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand has 19 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 14 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 16:58:25,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:25,827 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2021-05-02 16:58:25,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 16:58:25,828 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 14 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 106 [2021-05-02 16:58:25,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:25,829 INFO L225 Difference]: With dead ends: 116 [2021-05-02 16:58:25,829 INFO L226 Difference]: Without dead ends: 111 [2021-05-02 16:58:25,829 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 251.6ms TimeCoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-05-02 16:58:25,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-05-02 16:58:25,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2021-05-02 16:58:25,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 81 states have internal predecessors, (83), 16 states have call successors, (16), 15 states have call predecessors, (16), 13 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 16:58:25,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2021-05-02 16:58:25,836 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 106 [2021-05-02 16:58:25,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:25,836 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2021-05-02 16:58:25,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 14 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 16:58:25,837 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2021-05-02 16:58:25,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-05-02 16:58:25,837 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:25,837 INFO L523 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:26,038 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-02 16:58:26,038 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:26,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:26,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1935565549, now seen corresponding path program 12 times [2021-05-02 16:58:26,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:26,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932421358] [2021-05-02 16:58:26,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:26,044 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:26,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1498056828] [2021-05-02 16:58:26,045 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 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 16:58:26,271 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-05-02 16:58:26,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:58:26,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 16:58:26,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:26,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:26,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:26,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:26,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:26,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:26,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:26,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:26,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:26,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:26,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:26,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:26,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:26,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:26,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:26,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:26,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:26,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:26,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:26,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:26,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:26,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:26,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:26,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:26,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:26,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:26,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:26,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:26,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:26,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:26,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:26,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:26,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:26,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:26,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:26,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:26,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:26,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:26,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:26,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:26,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:26,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:26,570 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 24 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:58:26,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:26,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932421358] [2021-05-02 16:58:26,571 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:26,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498056828] [2021-05-02 16:58:26,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498056828] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:26,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:26,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 16:58:26,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249391800] [2021-05-02 16:58:26,572 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 16:58:26,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:26,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 16:58:26,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-02 16:58:26,572 INFO L87 Difference]: Start difference. First operand 111 states and 113 transitions. Second operand has 16 states, 16 states have (on average 5.0) internal successors, (80), 15 states have internal predecessors, (80), 15 states have call successors, (15), 15 states have call predecessors, (15), 13 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 16:58:27,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:27,007 INFO L93 Difference]: Finished difference Result 122 states and 123 transitions. [2021-05-02 16:58:27,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-02 16:58:27,007 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.0) internal successors, (80), 15 states have internal predecessors, (80), 15 states have call successors, (15), 15 states have call predecessors, (15), 13 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 108 [2021-05-02 16:58:27,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:27,008 INFO L225 Difference]: With dead ends: 122 [2021-05-02 16:58:27,008 INFO L226 Difference]: Without dead ends: 117 [2021-05-02 16:58:27,008 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 260.2ms TimeCoverageRelationStatistics Valid=287, Invalid=469, Unknown=0, NotChecked=0, Total=756 [2021-05-02 16:58:27,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-05-02 16:58:27,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2021-05-02 16:58:27,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 86 states have (on average 1.0232558139534884) internal successors, (88), 86 states have internal predecessors, (88), 16 states have call successors, (16), 16 states have call predecessors, (16), 14 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 16:58:27,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2021-05-02 16:58:27,015 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 108 [2021-05-02 16:58:27,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:27,015 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2021-05-02 16:58:27,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.0) internal successors, (80), 15 states have internal predecessors, (80), 15 states have call successors, (15), 15 states have call predecessors, (15), 13 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 16:58:27,016 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2021-05-02 16:58:27,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-05-02 16:58:27,016 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:27,016 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:27,217 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-02 16:58:27,217 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:27,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:27,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1170284597, now seen corresponding path program 12 times [2021-05-02 16:58:27,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:27,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261197173] [2021-05-02 16:58:27,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:27,229 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:27,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1784605462] [2021-05-02 16:58:27,230 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 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 16:58:27,527 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-05-02 16:58:27,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:58:27,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 67 conjunts are in the unsatisfiable core [2021-05-02 16:58:27,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:27,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:27,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:27,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:27,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:27,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:27,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:27,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:27,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:27,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:27,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:27,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:27,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:27,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:27,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:27,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:27,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:27,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:27,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:27,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:27,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:27,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:27,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:27,951 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 25 proven. 349 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-05-02 16:58:27,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:27,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261197173] [2021-05-02 16:58:27,952 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:27,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784605462] [2021-05-02 16:58:27,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784605462] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:27,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:27,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-05-02 16:58:27,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131646940] [2021-05-02 16:58:27,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 16:58:27,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:27,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 16:58:27,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2021-05-02 16:58:27,953 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand has 21 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 15 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 16:58:28,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:28,313 INFO L93 Difference]: Finished difference Result 124 states and 126 transitions. [2021-05-02 16:58:28,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 16:58:28,313 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 15 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 114 [2021-05-02 16:58:28,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:28,314 INFO L225 Difference]: With dead ends: 124 [2021-05-02 16:58:28,314 INFO L226 Difference]: Without dead ends: 119 [2021-05-02 16:58:28,315 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 268.4ms TimeCoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2021-05-02 16:58:28,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-05-02 16:58:28,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2021-05-02 16:58:28,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 87 states have (on average 1.0229885057471264) internal successors, (89), 87 states have internal predecessors, (89), 17 states have call successors, (17), 16 states have call predecessors, (17), 14 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 16:58:28,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2021-05-02 16:58:28,322 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 114 [2021-05-02 16:58:28,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:28,322 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2021-05-02 16:58:28,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 15 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 16:58:28,322 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2021-05-02 16:58:28,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-05-02 16:58:28,323 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:28,323 INFO L523 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:28,524 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-05-02 16:58:28,524 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:28,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:28,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1334563120, now seen corresponding path program 13 times [2021-05-02 16:58:28,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:28,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003194540] [2021-05-02 16:58:28,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:28,529 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:28,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1993397902] [2021-05-02 16:58:28,529 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:58:28,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:58:28,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 16:58:28,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:28,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:28,926 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 26 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:58:28,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:28,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003194540] [2021-05-02 16:58:28,927 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:28,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993397902] [2021-05-02 16:58:28,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993397902] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:28,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:28,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 16:58:28,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220705316] [2021-05-02 16:58:28,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 16:58:28,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:28,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 16:58:28,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-05-02 16:58:28,928 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand has 17 states, 17 states have (on average 5.0588235294117645) internal successors, (86), 16 states have internal predecessors, (86), 16 states have call successors, (16), 16 states have call predecessors, (16), 14 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 16:58:29,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:29,179 INFO L93 Difference]: Finished difference Result 130 states and 131 transitions. [2021-05-02 16:58:29,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-02 16:58:29,179 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.0588235294117645) internal successors, (86), 16 states have internal predecessors, (86), 16 states have call successors, (16), 16 states have call predecessors, (16), 14 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 116 [2021-05-02 16:58:29,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:29,180 INFO L225 Difference]: With dead ends: 130 [2021-05-02 16:58:29,180 INFO L226 Difference]: Without dead ends: 125 [2021-05-02 16:58:29,181 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 233.4ms TimeCoverageRelationStatistics Valid=330, Invalid=540, Unknown=0, NotChecked=0, Total=870 [2021-05-02 16:58:29,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-05-02 16:58:29,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2021-05-02 16:58:29,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 92 states have (on average 1.0217391304347827) internal successors, (94), 92 states have internal predecessors, (94), 17 states have call successors, (17), 17 states have call predecessors, (17), 15 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 16:58:29,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2021-05-02 16:58:29,188 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 116 [2021-05-02 16:58:29,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:29,188 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2021-05-02 16:58:29,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.0588235294117645) internal successors, (86), 16 states have internal predecessors, (86), 16 states have call successors, (16), 16 states have call predecessors, (16), 14 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 16:58:29,188 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2021-05-02 16:58:29,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-02 16:58:29,189 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:29,189 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:29,400 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:58:29,401 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:29,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:29,401 INFO L82 PathProgramCache]: Analyzing trace with hash -966570034, now seen corresponding path program 13 times [2021-05-02 16:58:29,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:29,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431061771] [2021-05-02 16:58:29,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:29,406 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:29,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [315686311] [2021-05-02 16:58:29,407 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:58:30,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:58:30,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 68 conjunts are in the unsatisfiable core [2021-05-02 16:58:30,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:30,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:30,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:30,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:30,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:30,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:30,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:30,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:30,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:30,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:30,503 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 27 proven. 404 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-05-02 16:58:30,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:30,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431061771] [2021-05-02 16:58:30,503 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:30,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315686311] [2021-05-02 16:58:30,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315686311] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:30,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:30,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-05-02 16:58:30,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741949790] [2021-05-02 16:58:30,504 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 16:58:30,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:30,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 16:58:30,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=380, Unknown=0, NotChecked=0, Total=420 [2021-05-02 16:58:30,505 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand has 21 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 16 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 16:58:30,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:30,903 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2021-05-02 16:58:30,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 16:58:30,904 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 16 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 122 [2021-05-02 16:58:30,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:30,904 INFO L225 Difference]: With dead ends: 132 [2021-05-02 16:58:30,904 INFO L226 Difference]: Without dead ends: 127 [2021-05-02 16:58:30,905 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 273.4ms TimeCoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2021-05-02 16:58:30,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-05-02 16:58:30,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2021-05-02 16:58:30,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 93 states have (on average 1.021505376344086) internal successors, (95), 93 states have internal predecessors, (95), 18 states have call successors, (18), 17 states have call predecessors, (18), 15 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 16:58:30,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 129 transitions. [2021-05-02 16:58:30,913 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 129 transitions. Word has length 122 [2021-05-02 16:58:30,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:30,913 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 129 transitions. [2021-05-02 16:58:30,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 16 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 16:58:30,913 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 129 transitions. [2021-05-02 16:58:30,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-05-02 16:58:30,914 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:30,914 INFO L523 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:31,119 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-05-02 16:58:31,119 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:31,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:31,119 INFO L82 PathProgramCache]: Analyzing trace with hash -464237453, now seen corresponding path program 14 times [2021-05-02 16:58:31,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:31,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514651901] [2021-05-02 16:58:31,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:31,124 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:31,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1519733165] [2021-05-02 16:58:31,125 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:58:31,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 16:58:31,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:58:31,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 16:58:31,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:31,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:31,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:31,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:31,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:31,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:31,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:31,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:31,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:31,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:31,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:31,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:31,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:31,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:31,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:31,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:31,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:31,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:31,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:31,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:31,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:31,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:31,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:31,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:31,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:31,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:31,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:31,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:31,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:31,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:31,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:31,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:31,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:31,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:31,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:31,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:31,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:31,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:31,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:31,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:31,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:31,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:31,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:31,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:31,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:31,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:31,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:31,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:31,555 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 28 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:58:31,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:31,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514651901] [2021-05-02 16:58:31,555 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:31,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519733165] [2021-05-02 16:58:31,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519733165] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:31,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:31,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 16:58:31,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135098956] [2021-05-02 16:58:31,556 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 16:58:31,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:31,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 16:58:31,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-05-02 16:58:31,557 INFO L87 Difference]: Start difference. First operand 127 states and 129 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 17 states have internal predecessors, (92), 17 states have call successors, (17), 17 states have call predecessors, (17), 15 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 16:58:32,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:32,023 INFO L93 Difference]: Finished difference Result 138 states and 139 transitions. [2021-05-02 16:58:32,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-02 16:58:32,024 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 17 states have internal predecessors, (92), 17 states have call successors, (17), 17 states have call predecessors, (17), 15 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 124 [2021-05-02 16:58:32,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:32,025 INFO L225 Difference]: With dead ends: 138 [2021-05-02 16:58:32,025 INFO L226 Difference]: Without dead ends: 133 [2021-05-02 16:58:32,025 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 307.6ms TimeCoverageRelationStatistics Valid=376, Invalid=616, Unknown=0, NotChecked=0, Total=992 [2021-05-02 16:58:32,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-05-02 16:58:32,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2021-05-02 16:58:32,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 98 states have (on average 1.0204081632653061) internal successors, (100), 98 states have internal predecessors, (100), 18 states have call successors, (18), 18 states have call predecessors, (18), 16 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 16:58:32,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2021-05-02 16:58:32,032 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 124 [2021-05-02 16:58:32,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:32,032 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2021-05-02 16:58:32,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 17 states have internal predecessors, (92), 17 states have call successors, (17), 17 states have call predecessors, (17), 15 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 16:58:32,033 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2021-05-02 16:58:32,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-05-02 16:58:32,033 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:32,033 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:32,234 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-05-02 16:58:32,234 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:32,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:32,234 INFO L82 PathProgramCache]: Analyzing trace with hash 467995857, now seen corresponding path program 14 times [2021-05-02 16:58:32,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:32,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885829454] [2021-05-02 16:58:32,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:32,240 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:32,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2132706165] [2021-05-02 16:58:32,240 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:58:33,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 16:58:33,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:58:33,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 72 conjunts are in the unsatisfiable core [2021-05-02 16:58:33,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:33,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:00,004 WARN L860 $PredicateComparison]: unable to prove that (and (= c_main_~c~0 0) (= c_main_~y~0 0) (= (mod (+ (* c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 2 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* c_main_~y~0 c_main_~y~0)) 4) 0)) is different from true [2021-05-02 16:59:00,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:00,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:00,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:00,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:00,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:00,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:00,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:00,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:00,397 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 29 proven. 449 refuted. 0 times theorem prover too weak. 378 trivial. 14 not checked. [2021-05-02 16:59:00,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:59:00,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885829454] [2021-05-02 16:59:00,398 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:59:00,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132706165] [2021-05-02 16:59:00,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132706165] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:59:00,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:59:00,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-05-02 16:59:00,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596748724] [2021-05-02 16:59:00,398 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 16:59:00,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:59:00,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 16:59:00,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=421, Unknown=1, NotChecked=40, Total=506 [2021-05-02 16:59:00,399 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand has 23 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 17 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 16:59:00,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:59:00,888 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2021-05-02 16:59:00,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-02 16:59:00,889 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 17 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 130 [2021-05-02 16:59:00,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:59:00,890 INFO L225 Difference]: With dead ends: 140 [2021-05-02 16:59:00,890 INFO L226 Difference]: Without dead ends: 135 [2021-05-02 16:59:00,891 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 27130.0ms TimeCoverageRelationStatistics Valid=59, Invalid=544, Unknown=1, NotChecked=46, Total=650 [2021-05-02 16:59:00,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-05-02 16:59:00,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2021-05-02 16:59:00,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 99 states have (on average 1.02020202020202) internal successors, (101), 99 states have internal predecessors, (101), 19 states have call successors, (19), 18 states have call predecessors, (19), 16 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 16:59:00,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 137 transitions. [2021-05-02 16:59:00,898 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 137 transitions. Word has length 130 [2021-05-02 16:59:00,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:59:00,898 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 137 transitions. [2021-05-02 16:59:00,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 17 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 16:59:00,899 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 137 transitions. [2021-05-02 16:59:00,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-05-02 16:59:00,899 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:59:00,899 INFO L523 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:59:01,107 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-02 16:59:01,107 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:59:01,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:59:01,107 INFO L82 PathProgramCache]: Analyzing trace with hash -530918218, now seen corresponding path program 15 times [2021-05-02 16:59:01,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:59:01,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403855820] [2021-05-02 16:59:01,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:59:01,112 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:59:01,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [302669384] [2021-05-02 16:59:01,113 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:59:01,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-05-02 16:59:01,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:59:01,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 16:59:01,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:59:01,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:01,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:01,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:01,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:01,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:01,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:01,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:01,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:01,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:02,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:02,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:02,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:02,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:02,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:02,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:02,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:02,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:02,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:02,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:02,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:02,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:02,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:02,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:02,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:02,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:02,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:02,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:02,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:02,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:02,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:02,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:02,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:02,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:02,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:02,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:02,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:02,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:02,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:02,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:02,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:02,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:02,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:02,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:02,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:02,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:02,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:02,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:02,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:02,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:02,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:02,290 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 30 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:59:02,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:59:02,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403855820] [2021-05-02 16:59:02,290 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:59:02,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302669384] [2021-05-02 16:59:02,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302669384] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:59:02,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:59:02,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-02 16:59:02,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433463050] [2021-05-02 16:59:02,291 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 16:59:02,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:59:02,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 16:59:02,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-05-02 16:59:02,292 INFO L87 Difference]: Start difference. First operand 135 states and 137 transitions. Second operand has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 18 states have internal predecessors, (98), 18 states have call successors, (18), 18 states have call predecessors, (18), 16 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 16:59:02,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:59:02,632 INFO L93 Difference]: Finished difference Result 146 states and 147 transitions. [2021-05-02 16:59:02,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-02 16:59:02,633 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 18 states have internal predecessors, (98), 18 states have call successors, (18), 18 states have call predecessors, (18), 16 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 132 [2021-05-02 16:59:02,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:59:02,634 INFO L225 Difference]: With dead ends: 146 [2021-05-02 16:59:02,634 INFO L226 Difference]: Without dead ends: 141 [2021-05-02 16:59:02,634 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 317.5ms TimeCoverageRelationStatistics Valid=425, Invalid=697, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 16:59:02,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-05-02 16:59:02,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2021-05-02 16:59:02,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 104 states have (on average 1.0192307692307692) internal successors, (106), 104 states have internal predecessors, (106), 19 states have call successors, (19), 19 states have call predecessors, (19), 17 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 16:59:02,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2021-05-02 16:59:02,642 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 132 [2021-05-02 16:59:02,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:59:02,642 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2021-05-02 16:59:02,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 18 states have internal predecessors, (98), 18 states have call successors, (18), 18 states have call predecessors, (18), 16 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 16:59:02,642 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2021-05-02 16:59:02,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-05-02 16:59:02,643 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:59:02,643 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:59:02,843 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-05-02 16:59:02,844 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:59:02,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:59:02,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1557719340, now seen corresponding path program 15 times [2021-05-02 16:59:02,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:59:02,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256287702] [2021-05-02 16:59:02,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:59:02,849 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:59:02,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2131905667] [2021-05-02 16:59:02,850 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:59:03,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-05-02 16:59:03,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:59:03,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 94 conjunts are in the unsatisfiable core [2021-05-02 16:59:03,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:59:03,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:03,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:03,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:03,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:05,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:05,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:05,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:05,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:05,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:05,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:05,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:05,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:05,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:05,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:05,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:05,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:05,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:05,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:05,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:05,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:05,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:05,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:05,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:05,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:05,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:05,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:05,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:05,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:05,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:05,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:07,630 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) (.cse2 (* c_main_~y~0 c_main_~y~0)) (.cse1 (* (- 2) c_main_~y~0 c_main_~y~0 c_main_~y~0))) (and (< 14 c_main_~k~0) (<= c_main_~c~0 15) (= (mod (+ .cse0 .cse1 .cse2) 4) 0) (= c_main_~y~0 15) (<= (+ (div (+ .cse0 .cse2 .cse1) 4) (* c_main_~y~0 c_main_~y~0 c_main_~y~0)) c_main_~x~0))) is different from true [2021-05-02 16:59:07,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:07,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:07,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:07,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:07,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:07,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:07,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:19,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:19,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:19,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:19,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:19,358 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 110 proven. 474 refuted. 0 times theorem prover too weak. 363 trivial. 45 not checked. [2021-05-02 16:59:19,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:59:19,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256287702] [2021-05-02 16:59:19,359 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:59:19,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131905667] [2021-05-02 16:59:19,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131905667] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:59:19,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:59:19,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-05-02 16:59:19,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322656620] [2021-05-02 16:59:19,360 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 16:59:19,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:59:19,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 16:59:19,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=550, Unknown=2, NotChecked=46, Total=650 [2021-05-02 16:59:19,361 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand has 26 states, 25 states have (on average 2.4) internal successors, (60), 22 states have internal predecessors, (60), 18 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 16:59:22,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:59:22,015 INFO L93 Difference]: Finished difference Result 148 states and 150 transitions. [2021-05-02 16:59:22,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-02 16:59:22,015 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.4) internal successors, (60), 22 states have internal predecessors, (60), 18 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Word has length 138 [2021-05-02 16:59:22,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:59:22,016 INFO L225 Difference]: With dead ends: 148 [2021-05-02 16:59:22,016 INFO L226 Difference]: Without dead ends: 143 [2021-05-02 16:59:22,017 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 15675.8ms TimeCoverageRelationStatistics Valid=67, Invalid=691, Unknown=2, NotChecked=52, Total=812 [2021-05-02 16:59:22,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-05-02 16:59:22,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2021-05-02 16:59:22,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 105 states have (on average 1.019047619047619) internal successors, (107), 105 states have internal predecessors, (107), 20 states have call successors, (20), 19 states have call predecessors, (20), 17 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 16:59:22,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 145 transitions. [2021-05-02 16:59:22,047 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 145 transitions. Word has length 138 [2021-05-02 16:59:22,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:59:22,047 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 145 transitions. [2021-05-02 16:59:22,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 25 states have (on average 2.4) internal successors, (60), 22 states have internal predecessors, (60), 18 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 16:59:22,048 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 145 transitions. [2021-05-02 16:59:22,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-05-02 16:59:22,049 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:59:22,049 INFO L523 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:59:22,256 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-05-02 16:59:22,256 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:59:22,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:59:22,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1623037447, now seen corresponding path program 16 times [2021-05-02 16:59:22,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:59:22,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218075218] [2021-05-02 16:59:22,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:59:22,263 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:59:22,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [22200785] [2021-05-02 16:59:22,263 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:59:23,102 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 16:59:23,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:59:23,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 16:59:23,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:59:23,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:23,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:23,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:23,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:23,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:23,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:23,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:23,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:23,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:23,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:23,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:23,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:23,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:23,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:23,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:23,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:23,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:23,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:23,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:23,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:23,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:23,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:23,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:23,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:23,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:23,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:23,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:23,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:23,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:23,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:23,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:23,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:23,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:23,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:23,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:23,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:23,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:23,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:23,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:23,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:23,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:23,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:23,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:23,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:23,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:23,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:23,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:23,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:23,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:23,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:23,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:23,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:23,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:23,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 32 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:59:23,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:59:23,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218075218] [2021-05-02 16:59:23,501 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:59:23,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22200785] [2021-05-02 16:59:23,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22200785] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:59:23,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:59:23,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-02 16:59:23,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895104909] [2021-05-02 16:59:23,501 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 16:59:23,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:59:23,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 16:59:23,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-05-02 16:59:23,502 INFO L87 Difference]: Start difference. First operand 143 states and 145 transitions. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 19 states have internal predecessors, (104), 19 states have call successors, (19), 19 states have call predecessors, (19), 17 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 16:59:23,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:59:23,889 INFO L93 Difference]: Finished difference Result 154 states and 155 transitions. [2021-05-02 16:59:23,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-02 16:59:23,889 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 19 states have internal predecessors, (104), 19 states have call successors, (19), 19 states have call predecessors, (19), 17 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Word has length 140 [2021-05-02 16:59:23,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:59:23,890 INFO L225 Difference]: With dead ends: 154 [2021-05-02 16:59:23,890 INFO L226 Difference]: Without dead ends: 149 [2021-05-02 16:59:23,890 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 340.9ms TimeCoverageRelationStatistics Valid=477, Invalid=783, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 16:59:23,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-05-02 16:59:23,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2021-05-02 16:59:23,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 110 states have (on average 1.018181818181818) internal successors, (112), 110 states have internal predecessors, (112), 20 states have call successors, (20), 20 states have call predecessors, (20), 18 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 16:59:23,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2021-05-02 16:59:23,898 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 140 [2021-05-02 16:59:23,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:59:23,899 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2021-05-02 16:59:23,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 19 states have internal predecessors, (104), 19 states have call successors, (19), 19 states have call predecessors, (19), 17 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 16:59:23,899 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2021-05-02 16:59:23,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-05-02 16:59:23,900 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:59:23,900 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:59:24,104 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-05-02 16:59:24,104 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:59:24,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:59:24,105 INFO L82 PathProgramCache]: Analyzing trace with hash 831286743, now seen corresponding path program 16 times [2021-05-02 16:59:24,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:59:24,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377302281] [2021-05-02 16:59:24,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:59:24,112 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:59:24,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [457632751] [2021-05-02 16:59:24,112 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:59:25,171 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 16:59:25,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:59:25,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 80 conjunts are in the unsatisfiable core [2021-05-02 16:59:25,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:59:25,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:03,241 WARN L860 $PredicateComparison]: unable to prove that (and (= c_main_~c~0 0) (= c_main_~y~0 0) (= (mod (+ (* c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 2 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* c_main_~y~0 c_main_~y~0)) 4) 0)) is different from true [2021-05-02 17:00:03,369 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 6 [2021-05-02 17:00:03,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:03,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:03,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:03,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:03,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:03,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:03,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:03,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:03,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 33 proven. 577 refuted. 0 times theorem prover too weak. 496 trivial. 16 not checked. [2021-05-02 17:00:03,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:00:03,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377302281] [2021-05-02 17:00:03,868 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:00:03,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457632751] [2021-05-02 17:00:03,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457632751] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:00:03,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:00:03,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-05-02 17:00:03,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170452510] [2021-05-02 17:00:03,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 17:00:03,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:00:03,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 17:00:03,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=507, Unknown=1, NotChecked=44, Total=600 [2021-05-02 17:00:03,869 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand has 25 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 19 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 17:00:04,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:00:04,426 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2021-05-02 17:00:04,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-02 17:00:04,427 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 19 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 146 [2021-05-02 17:00:04,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:00:04,428 INFO L225 Difference]: With dead ends: 156 [2021-05-02 17:00:04,428 INFO L226 Difference]: Without dead ends: 151 [2021-05-02 17:00:04,428 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 38498.1ms TimeCoverageRelationStatistics Valid=63, Invalid=642, Unknown=1, NotChecked=50, Total=756 [2021-05-02 17:00:04,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-05-02 17:00:04,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2021-05-02 17:00:04,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 111 states have (on average 1.018018018018018) internal successors, (113), 111 states have internal predecessors, (113), 21 states have call successors, (21), 20 states have call predecessors, (21), 18 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 17:00:04,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 153 transitions. [2021-05-02 17:00:04,437 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 153 transitions. Word has length 146 [2021-05-02 17:00:04,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:00:04,438 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 153 transitions. [2021-05-02 17:00:04,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 19 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 17:00:04,438 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 153 transitions. [2021-05-02 17:00:04,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-05-02 17:00:04,439 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:00:04,439 INFO L523 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:00:04,644 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-05-02 17:00:04,645 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:00:04,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:00:04,645 INFO L82 PathProgramCache]: Analyzing trace with hash 699272252, now seen corresponding path program 17 times [2021-05-02 17:00:04,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:00:04,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767525179] [2021-05-02 17:00:04,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:00:04,654 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:00:04,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [949110710] [2021-05-02 17:00:04,654 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:00:05,131 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-05-02 17:00:05,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:00:05,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-02 17:00:05,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:00:05,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:05,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:05,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:05,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:05,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:05,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:05,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:05,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:05,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:05,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:05,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:05,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:05,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:05,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:05,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:05,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:05,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:05,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:05,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:05,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:05,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:05,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:05,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:05,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:05,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:05,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:05,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:05,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:05,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:05,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:05,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:05,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:05,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:05,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:05,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:05,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:05,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:05,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:05,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:05,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:05,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:05,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:05,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:05,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:05,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:05,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:05,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:05,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:05,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:05,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:05,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:05,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:05,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:05,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:05,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:05,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:05,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 34 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:00:05,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:00:05,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767525179] [2021-05-02 17:00:05,562 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:00:05,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949110710] [2021-05-02 17:00:05,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949110710] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:00:05,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:00:05,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-05-02 17:00:05,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002453377] [2021-05-02 17:00:05,562 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 17:00:05,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:00:05,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 17:00:05,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2021-05-02 17:00:05,563 INFO L87 Difference]: Start difference. First operand 151 states and 153 transitions. Second operand has 21 states, 21 states have (on average 5.238095238095238) internal successors, (110), 20 states have internal predecessors, (110), 20 states have call successors, (20), 20 states have call predecessors, (20), 18 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 17:00:06,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:00:06,099 INFO L93 Difference]: Finished difference Result 162 states and 163 transitions. [2021-05-02 17:00:06,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-02 17:00:06,099 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.238095238095238) internal successors, (110), 20 states have internal predecessors, (110), 20 states have call successors, (20), 20 states have call predecessors, (20), 18 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 148 [2021-05-02 17:00:06,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:00:06,100 INFO L225 Difference]: With dead ends: 162 [2021-05-02 17:00:06,100 INFO L226 Difference]: Without dead ends: 157 [2021-05-02 17:00:06,101 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 428.3ms TimeCoverageRelationStatistics Valid=532, Invalid=874, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 17:00:06,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-05-02 17:00:06,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2021-05-02 17:00:06,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 116 states have (on average 1.0172413793103448) internal successors, (118), 116 states have internal predecessors, (118), 21 states have call successors, (21), 21 states have call predecessors, (21), 19 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 17:00:06,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2021-05-02 17:00:06,108 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 148 [2021-05-02 17:00:06,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:00:06,110 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2021-05-02 17:00:06,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.238095238095238) internal successors, (110), 20 states have internal predecessors, (110), 20 states have call successors, (20), 20 states have call predecessors, (20), 18 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 17:00:06,110 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2021-05-02 17:00:06,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-05-02 17:00:06,111 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:00:06,111 INFO L523 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:00:06,315 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:00:06,316 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:00:06,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:00:06,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1988619814, now seen corresponding path program 17 times [2021-05-02 17:00:06,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:00:06,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934138111] [2021-05-02 17:00:06,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:00:06,323 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:00:06,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [36396719] [2021-05-02 17:00:06,323 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:00:06,898 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-05-02 17:00:06,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:00:06,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 85 conjunts are in the unsatisfiable core [2021-05-02 17:00:06,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:00:06,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:06,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:06,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:07,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:07,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:07,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:07,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:07,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:07,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:07,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:07,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:07,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:07,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:07,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:07,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:07,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:07,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:07,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:07,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:07,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:07,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:07,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:07,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:07,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:07,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:07,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:07,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:07,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:07,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:07,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:07,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:07,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:07,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:07,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:07,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:07,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:07,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:07,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 41 proven. 658 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2021-05-02 17:00:07,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:00:07,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934138111] [2021-05-02 17:00:07,628 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:00:07,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36396719] [2021-05-02 17:00:07,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36396719] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:00:07,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:00:07,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-05-02 17:00:07,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763837892] [2021-05-02 17:00:07,629 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 17:00:07,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:00:07,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 17:00:07,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=552, Unknown=0, NotChecked=0, Total=600 [2021-05-02 17:00:07,630 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand has 25 states, 24 states have (on average 2.75) internal successors, (66), 24 states have internal predecessors, (66), 20 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 17:00:08,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:00:08,213 INFO L93 Difference]: Finished difference Result 164 states and 166 transitions. [2021-05-02 17:00:08,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-02 17:00:08,214 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.75) internal successors, (66), 24 states have internal predecessors, (66), 20 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Word has length 154 [2021-05-02 17:00:08,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:00:08,215 INFO L225 Difference]: With dead ends: 164 [2021-05-02 17:00:08,215 INFO L226 Difference]: Without dead ends: 159 [2021-05-02 17:00:08,215 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 488.1ms TimeCoverageRelationStatistics Valid=63, Invalid=693, Unknown=0, NotChecked=0, Total=756 [2021-05-02 17:00:08,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-05-02 17:00:08,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2021-05-02 17:00:08,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 117 states have (on average 1.017094017094017) internal successors, (119), 117 states have internal predecessors, (119), 22 states have call successors, (22), 21 states have call predecessors, (22), 19 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-02 17:00:08,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 161 transitions. [2021-05-02 17:00:08,223 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 161 transitions. Word has length 154 [2021-05-02 17:00:08,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:00:08,223 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 161 transitions. [2021-05-02 17:00:08,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 24 states have (on average 2.75) internal successors, (66), 24 states have internal predecessors, (66), 20 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 17:00:08,224 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 161 transitions. [2021-05-02 17:00:08,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-05-02 17:00:08,224 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:00:08,224 INFO L523 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:00:08,428 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-05-02 17:00:08,429 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:00:08,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:00:08,429 INFO L82 PathProgramCache]: Analyzing trace with hash 893434751, now seen corresponding path program 18 times [2021-05-02 17:00:08,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:00:08,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057683914] [2021-05-02 17:00:08,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:00:08,434 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:00:08,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [124452621] [2021-05-02 17:00:08,434 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:00:09,151 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-05-02 17:00:09,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:00:09,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-02 17:00:09,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:00:09,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:09,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:09,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:09,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:09,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:09,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:09,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:09,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:09,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:09,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:09,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:09,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:09,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:09,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:09,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:09,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:09,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:09,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:09,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:09,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:09,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:09,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:09,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:09,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:09,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:09,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:09,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:09,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:09,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:09,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:09,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:09,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:09,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:09,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:09,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:09,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:09,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:09,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:09,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:09,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:09,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:09,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:09,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:09,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:09,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:09,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:09,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:09,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:09,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:09,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:09,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:09,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:09,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:09,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:09,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:09,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:09,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:09,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:09,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:09,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 36 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:00:09,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:00:09,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057683914] [2021-05-02 17:00:09,618 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:00:09,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124452621] [2021-05-02 17:00:09,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124452621] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:00:09,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:00:09,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-05-02 17:00:09,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676556456] [2021-05-02 17:00:09,619 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 17:00:09,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:00:09,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 17:00:09,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-02 17:00:09,619 INFO L87 Difference]: Start difference. First operand 159 states and 161 transitions. Second operand has 22 states, 22 states have (on average 5.2727272727272725) internal successors, (116), 21 states have internal predecessors, (116), 21 states have call successors, (21), 21 states have call predecessors, (21), 19 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 17:00:10,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:00:10,255 INFO L93 Difference]: Finished difference Result 170 states and 171 transitions. [2021-05-02 17:00:10,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-02 17:00:10,256 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2727272727272725) internal successors, (116), 21 states have internal predecessors, (116), 21 states have call successors, (21), 21 states have call predecessors, (21), 19 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Word has length 156 [2021-05-02 17:00:10,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:00:10,257 INFO L225 Difference]: With dead ends: 170 [2021-05-02 17:00:10,257 INFO L226 Difference]: Without dead ends: 165 [2021-05-02 17:00:10,257 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 448.9ms TimeCoverageRelationStatistics Valid=590, Invalid=970, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 17:00:10,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-05-02 17:00:10,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2021-05-02 17:00:10,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 122 states have (on average 1.0163934426229508) internal successors, (124), 122 states have internal predecessors, (124), 22 states have call successors, (22), 22 states have call predecessors, (22), 20 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-02 17:00:10,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2021-05-02 17:00:10,265 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 156 [2021-05-02 17:00:10,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:00:10,265 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2021-05-02 17:00:10,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2727272727272725) internal successors, (116), 21 states have internal predecessors, (116), 21 states have call successors, (21), 21 states have call predecessors, (21), 19 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 17:00:10,266 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2021-05-02 17:00:10,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-05-02 17:00:10,266 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:00:10,267 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:00:10,472 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:00:10,473 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:00:10,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:00:10,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1514996445, now seen corresponding path program 18 times [2021-05-02 17:00:10,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:00:10,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668348717] [2021-05-02 17:00:10,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:00:10,478 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:00:10,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [493461617] [2021-05-02 17:00:10,479 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:00:11,510 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-05-02 17:00:11,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:00:11,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 91 conjunts are in the unsatisfiable core [2021-05-02 17:00:11,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:00:11,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:11,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:11,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:11,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:11,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:11,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:11,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:11,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:11,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:11,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:11,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:11,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:12,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:12,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:12,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:12,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:12,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:12,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:12,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:12,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:12,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:12,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:12,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:12,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:12,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:12,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:12,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 37 proven. 739 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2021-05-02 17:00:12,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:00:12,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668348717] [2021-05-02 17:00:12,231 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:00:12,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493461617] [2021-05-02 17:00:12,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493461617] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:00:12,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:00:12,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2021-05-02 17:00:12,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980514987] [2021-05-02 17:00:12,231 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-02 17:00:12,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:00:12,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-02 17:00:12,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2021-05-02 17:00:12,232 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand has 27 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 21 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-02 17:00:12,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:00:12,926 INFO L93 Difference]: Finished difference Result 172 states and 174 transitions. [2021-05-02 17:00:12,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-02 17:00:12,927 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 21 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 162 [2021-05-02 17:00:12,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:00:12,928 INFO L225 Difference]: With dead ends: 172 [2021-05-02 17:00:12,928 INFO L226 Difference]: Without dead ends: 167 [2021-05-02 17:00:12,928 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 464.1ms TimeCoverageRelationStatistics Valid=68, Invalid=802, Unknown=0, NotChecked=0, Total=870 [2021-05-02 17:00:12,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-05-02 17:00:12,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2021-05-02 17:00:12,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 123 states have (on average 1.016260162601626) internal successors, (125), 123 states have internal predecessors, (125), 23 states have call successors, (23), 22 states have call predecessors, (23), 20 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 17:00:12,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 169 transitions. [2021-05-02 17:00:12,937 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 169 transitions. Word has length 162 [2021-05-02 17:00:12,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:00:12,938 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 169 transitions. [2021-05-02 17:00:12,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 21 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-02 17:00:12,938 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 169 transitions. [2021-05-02 17:00:12,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-05-02 17:00:12,939 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:00:12,939 INFO L523 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:00:13,144 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-05-02 17:00:13,145 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:00:13,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:00:13,145 INFO L82 PathProgramCache]: Analyzing trace with hash 614299586, now seen corresponding path program 19 times [2021-05-02 17:00:13,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:00:13,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419932733] [2021-05-02 17:00:13,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:00:13,151 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:00:13,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1779669328] [2021-05-02 17:00:13,152 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:00:13,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:00:13,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-02 17:00:13,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:00:13,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:13,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:13,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:13,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:13,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:13,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:13,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:13,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:13,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:13,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:13,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:13,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:13,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:13,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:13,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:13,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:13,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:13,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:13,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:13,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:13,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:13,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:13,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:13,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:13,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:13,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:13,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:13,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:13,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:13,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:13,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:13,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:13,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:13,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:13,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:13,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:13,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:13,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:13,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:13,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:13,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:13,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:13,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:13,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:13,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:13,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:13,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:13,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:13,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:13,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:13,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:13,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:13,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:13,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:13,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:13,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:13,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:13,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:13,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:13,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:13,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:13,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:13,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 38 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:00:13,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:00:13,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419932733] [2021-05-02 17:00:13,766 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:00:13,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779669328] [2021-05-02 17:00:13,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779669328] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:00:13,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:00:13,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-05-02 17:00:13,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287275043] [2021-05-02 17:00:13,767 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 17:00:13,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:00:13,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 17:00:13,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-05-02 17:00:13,768 INFO L87 Difference]: Start difference. First operand 167 states and 169 transitions. Second operand has 23 states, 23 states have (on average 5.304347826086956) internal successors, (122), 22 states have internal predecessors, (122), 22 states have call successors, (22), 22 states have call predecessors, (22), 20 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-02 17:00:14,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:00:14,294 INFO L93 Difference]: Finished difference Result 178 states and 179 transitions. [2021-05-02 17:00:14,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-02 17:00:14,294 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.304347826086956) internal successors, (122), 22 states have internal predecessors, (122), 22 states have call successors, (22), 22 states have call predecessors, (22), 20 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 164 [2021-05-02 17:00:14,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:00:14,295 INFO L225 Difference]: With dead ends: 178 [2021-05-02 17:00:14,295 INFO L226 Difference]: Without dead ends: 173 [2021-05-02 17:00:14,296 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 482.1ms TimeCoverageRelationStatistics Valid=651, Invalid=1071, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 17:00:14,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-05-02 17:00:14,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2021-05-02 17:00:14,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 128 states have (on average 1.015625) internal successors, (130), 128 states have internal predecessors, (130), 23 states have call successors, (23), 23 states have call predecessors, (23), 21 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 17:00:14,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 174 transitions. [2021-05-02 17:00:14,304 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 174 transitions. Word has length 164 [2021-05-02 17:00:14,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:00:14,304 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 174 transitions. [2021-05-02 17:00:14,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.304347826086956) internal successors, (122), 22 states have internal predecessors, (122), 22 states have call successors, (22), 22 states have call predecessors, (22), 20 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-02 17:00:14,304 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 174 transitions. [2021-05-02 17:00:14,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-05-02 17:00:14,305 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:00:14,305 INFO L523 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:00:14,509 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:00:14,509 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:00:14,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:00:14,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1080967392, now seen corresponding path program 19 times [2021-05-02 17:00:14,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:00:14,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508842385] [2021-05-02 17:00:14,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:00:14,514 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:00:14,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2014434932] [2021-05-02 17:00:14,515 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:00:15,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:00:15,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 92 conjunts are in the unsatisfiable core [2021-05-02 17:00:15,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:00:15,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:15,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:15,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:15,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:15,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:15,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:15,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:15,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:15,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:15,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 39 proven. 818 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2021-05-02 17:00:15,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:00:15,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508842385] [2021-05-02 17:00:15,784 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:00:15,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014434932] [2021-05-02 17:00:15,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014434932] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:00:15,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:00:15,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2021-05-02 17:00:15,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179523761] [2021-05-02 17:00:15,784 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-02 17:00:15,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:00:15,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-02 17:00:15,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=650, Unknown=0, NotChecked=0, Total=702 [2021-05-02 17:00:15,785 INFO L87 Difference]: Start difference. First operand 173 states and 174 transitions. Second operand has 27 states, 26 states have (on average 2.769230769230769) internal successors, (72), 26 states have internal predecessors, (72), 22 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 17:00:16,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:00:16,506 INFO L93 Difference]: Finished difference Result 180 states and 182 transitions. [2021-05-02 17:00:16,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-02 17:00:16,508 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.769230769230769) internal successors, (72), 26 states have internal predecessors, (72), 22 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Word has length 170 [2021-05-02 17:00:16,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:00:16,509 INFO L225 Difference]: With dead ends: 180 [2021-05-02 17:00:16,509 INFO L226 Difference]: Without dead ends: 175 [2021-05-02 17:00:16,510 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 143 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 433.6ms TimeCoverageRelationStatistics Valid=67, Invalid=803, Unknown=0, NotChecked=0, Total=870 [2021-05-02 17:00:16,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-05-02 17:00:16,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2021-05-02 17:00:16,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 129 states have (on average 1.0155038759689923) internal successors, (131), 129 states have internal predecessors, (131), 24 states have call successors, (24), 23 states have call predecessors, (24), 21 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 17:00:16,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 177 transitions. [2021-05-02 17:00:16,518 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 177 transitions. Word has length 170 [2021-05-02 17:00:16,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:00:16,518 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 177 transitions. [2021-05-02 17:00:16,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 26 states have (on average 2.769230769230769) internal successors, (72), 26 states have internal predecessors, (72), 22 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 17:00:16,519 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 177 transitions. [2021-05-02 17:00:16,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-05-02 17:00:16,519 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:00:16,519 INFO L523 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:00:16,725 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:00:16,725 INFO L428 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:00:16,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:00:16,726 INFO L82 PathProgramCache]: Analyzing trace with hash 124207365, now seen corresponding path program 20 times [2021-05-02 17:00:16,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:00:16,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788610699] [2021-05-02 17:00:16,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:00:16,732 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:00:16,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1477098004] [2021-05-02 17:00:16,732 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:00:17,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:00:17,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-05-02 17:00:17,675 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 17:00:17,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 17:00:17,959 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 17:00:18,179 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-02 17:00:18,179 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 17:00:18,385 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-05-02 17:00:18,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 05:00:18 BoogieIcfgContainer [2021-05-02 17:00:18,483 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 17:00:18,484 INFO L168 Benchmark]: Toolchain (without parser) took 334387.75 ms. Allocated memory was 202.4 MB in the beginning and 243.3 MB in the end (delta: 40.9 MB). Free memory was 167.4 MB in the beginning and 200.1 MB in the end (delta: -32.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 8.0 GB. [2021-05-02 17:00:18,484 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 202.4 MB. Free memory is still 184.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 17:00:18,484 INFO L168 Benchmark]: CACSL2BoogieTranslator took 216.77 ms. Allocated memory is still 202.4 MB. Free memory was 167.1 MB in the beginning and 157.5 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 17:00:18,484 INFO L168 Benchmark]: Boogie Preprocessor took 61.24 ms. Allocated memory is still 202.4 MB. Free memory was 157.4 MB in the beginning and 186.0 MB in the end (delta: -28.6 MB). Peak memory consumption was 3.9 MB. Max. memory is 8.0 GB. [2021-05-02 17:00:18,484 INFO L168 Benchmark]: RCFGBuilder took 355.02 ms. Allocated memory is still 202.4 MB. Free memory was 186.0 MB in the beginning and 171.3 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 17:00:18,484 INFO L168 Benchmark]: TraceAbstraction took 333746.79 ms. Allocated memory was 202.4 MB in the beginning and 243.3 MB in the end (delta: 40.9 MB). Free memory was 170.8 MB in the beginning and 200.1 MB in the end (delta: -29.3 MB). Peak memory consumption was 13.2 MB. Max. memory is 8.0 GB. [2021-05-02 17:00:18,485 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 202.4 MB. Free memory is still 184.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 216.77 ms. Allocated memory is still 202.4 MB. Free memory was 167.1 MB in the beginning and 157.5 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 61.24 ms. Allocated memory is still 202.4 MB. Free memory was 157.4 MB in the beginning and 186.0 MB in the end (delta: -28.6 MB). Peak memory consumption was 3.9 MB. Max. memory is 8.0 GB. * RCFGBuilder took 355.02 ms. Allocated memory is still 202.4 MB. Free memory was 186.0 MB in the beginning and 171.3 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 333746.79 ms. Allocated memory was 202.4 MB in the beginning and 243.3 MB in the end (delta: 40.9 MB). Free memory was 170.8 MB in the beginning and 200.1 MB in the end (delta: -29.3 MB). Peak memory consumption was 13.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] int counter = 0; VAL [\old(counter)=28, counter=0] [L19] short k; [L20] long long y, x, c; [L21] k = __VERIFIER_nondet_short() [L23] y = 0 [L24] x = 0 [L25] c = 0 VAL [\old(counter)=0, c=0, counter=0, k=21, x=0, y=0] [L27] EXPR counter++ VAL [\old(counter)=0, c=0, counter=1, counter++=0, k=21, x=0, y=0] [L27] COND TRUE counter++<20 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=0, counter=1, k=21, x=0, y=0] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=1, counter=1, k=21, x=1, y=1] [L27] EXPR counter++ VAL [\old(counter)=0, c=1, counter=2, counter++=1, k=21, x=1, y=1] [L27] COND TRUE counter++<20 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=1, counter=2, k=21, x=1, y=1] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=2, counter=2, k=21, x=9, y=2] [L27] EXPR counter++ VAL [\old(counter)=0, c=2, counter=3, counter++=2, k=21, x=9, y=2] [L27] COND TRUE counter++<20 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=2, counter=3, k=21, x=9, y=2] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=3, counter=3, k=21, x=36, y=3] [L27] EXPR counter++ VAL [\old(counter)=0, c=3, counter=4, counter++=3, k=21, x=36, y=3] [L27] COND TRUE counter++<20 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=3, counter=4, k=21, x=36, y=3] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=4, counter=4, k=21, x=100, y=4] [L27] EXPR counter++ VAL [\old(counter)=0, c=4, counter=5, counter++=4, k=21, x=100, y=4] [L27] COND TRUE counter++<20 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=4, counter=5, k=21, x=100, y=4] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=5, counter=5, k=21, x=225, y=5] [L27] EXPR counter++ VAL [\old(counter)=0, c=5, counter=6, counter++=5, k=21, x=225, y=5] [L27] COND TRUE counter++<20 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=6] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=6] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=5, counter=6, k=21, x=225, y=5] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=6, counter=6, k=21, x=441, y=6] [L27] EXPR counter++ VAL [\old(counter)=0, c=6, counter=7, counter++=6, k=21, x=441, y=6] [L27] COND TRUE counter++<20 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=7] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=7] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=6, counter=7, k=21, x=441, y=6] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=7, counter=7, k=21, x=784, y=7] [L27] EXPR counter++ VAL [\old(counter)=0, c=7, counter=8, counter++=7, k=21, x=784, y=7] [L27] COND TRUE counter++<20 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=8] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=8] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=7, counter=8, k=21, x=784, y=7] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=8, counter=8, k=21, x=1296, y=8] [L27] EXPR counter++ VAL [\old(counter)=0, c=8, counter=9, counter++=8, k=21, x=1296, y=8] [L27] COND TRUE counter++<20 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=8, counter=9, k=21, x=1296, y=8] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=9, counter=9, k=21, x=2025, y=9] [L27] EXPR counter++ VAL [\old(counter)=0, c=9, counter=10, counter++=9, k=21, x=2025, y=9] [L27] COND TRUE counter++<20 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=10] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=10] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=9, counter=10, k=21, x=2025, y=9] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=10, counter=10, k=21, x=3025, y=10] [L27] EXPR counter++ VAL [\old(counter)=0, c=10, counter=11, counter++=10, k=21, x=3025, y=10] [L27] COND TRUE counter++<20 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=11] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=11] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=10, counter=11, k=21, x=3025, y=10] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=11, counter=11, k=21, x=4356, y=11] [L27] EXPR counter++ VAL [\old(counter)=0, c=11, counter=12, counter++=11, k=21, x=4356, y=11] [L27] COND TRUE counter++<20 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=12] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=12] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=11, counter=12, k=21, x=4356, y=11] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=12, counter=12, k=21, x=6084, y=12] [L27] EXPR counter++ VAL [\old(counter)=0, c=12, counter=13, counter++=12, k=21, x=6084, y=12] [L27] COND TRUE counter++<20 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=13] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=13] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=12, counter=13, k=21, x=6084, y=12] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=13, counter=13, k=21, x=8281, y=13] [L27] EXPR counter++ VAL [\old(counter)=0, c=13, counter=14, counter++=13, k=21, x=8281, y=13] [L27] COND TRUE counter++<20 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=14] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=14] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=13, counter=14, k=21, x=8281, y=13] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=14, counter=14, k=21, x=11025, y=14] [L27] EXPR counter++ VAL [\old(counter)=0, c=14, counter=15, counter++=14, k=21, x=11025, y=14] [L27] COND TRUE counter++<20 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=15] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=15] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=14, counter=15, k=21, x=11025, y=14] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=15, counter=15, k=21, x=14400, y=15] [L27] EXPR counter++ VAL [\old(counter)=0, c=15, counter=16, counter++=15, k=21, x=14400, y=15] [L27] COND TRUE counter++<20 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=16] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=16] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=15, counter=16, k=21, x=14400, y=15] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=16, counter=16, k=21, x=18496, y=16] [L27] EXPR counter++ VAL [\old(counter)=0, c=16, counter=17, counter++=16, k=21, x=18496, y=16] [L27] COND TRUE counter++<20 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=17] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=17] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=16, counter=17, k=21, x=18496, y=16] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=17, counter=17, k=21, x=23409, y=17] [L27] EXPR counter++ VAL [\old(counter)=0, c=17, counter=18, counter++=17, k=21, x=23409, y=17] [L27] COND TRUE counter++<20 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=18] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=18] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=17, counter=18, k=21, x=23409, y=17] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=18, counter=18, k=21, x=29241, y=18] [L27] EXPR counter++ VAL [\old(counter)=0, c=18, counter=19, counter++=18, k=21, x=29241, y=18] [L27] COND TRUE counter++<20 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=19] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=19] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=18, counter=19, k=21, x=29241, y=18] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=19, counter=19, k=21, x=36100, y=19] [L27] EXPR counter++ VAL [\old(counter)=0, c=19, counter=20, counter++=19, k=21, x=36100, y=19] [L27] COND TRUE counter++<20 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=20] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=20] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=19, counter=20, k=21, x=36100, y=19] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=20, counter=20, k=21, x=44100, y=20] [L27] EXPR counter++ VAL [\old(counter)=0, c=20, counter=21, counter++=20, k=21, x=44100, y=20] [L27] COND FALSE !(counter++<20) [L37] CALL __VERIFIER_assert(k*y - (y*y) == 0) VAL [\old(cond)=0, \old(counter)=0, counter=21] [L10] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=21] [L12] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=21] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 333589.9ms, OverallIterations: 45, TraceHistogramMax: 21, EmptinessCheckTime: 40.0ms, AutomataDifference: 211795.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1478 SDtfs, 310 SDslu, 15759 SDs, 0 SdLazy, 11549 SolverSat, 203 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 206228.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3935 GetRequests, 3103 SyntacticMatches, 13 SemanticMatches, 819 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1511 ImplicationChecksByTransitivity, 89495.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=175occurred in iteration=44, InterpolantAutomatonStates: 837, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 363.0ms AutomataMinimizationTime, 44 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 543.8ms SsaConstructionTime, 15861.1ms SatisfiabilityAnalysisTime, 93754.2ms InterpolantComputationTime, 3901 NumberOfCodeBlocks, 3885 NumberOfCodeBlocksAsserted, 252 NumberOfCheckSat, 3685 ConstructedInterpolants, 0 QuantifiedInterpolants, 14115 SizeOfPredicates, 301 NumberOfNonLiveVariables, 12769 ConjunctsInSsa, 1651 ConjunctsInUnsatCore, 44 InterpolantComputations, 3 PerfectInterpolantSequences, 5616/21000 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 RESULT: Ultimate proved your program to be incorrect! Received shutdown request...