/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 15:25:32,206 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 15:25:32,208 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 15:25:32,225 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 15:25:32,231 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 15:25:32,232 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 15:25:32,232 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 15:25:32,233 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 15:25:32,233 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 15:25:32,234 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 15:25:32,235 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 15:25:32,236 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 15:25:32,237 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 15:25:32,237 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 15:25:32,238 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 15:25:32,239 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 15:25:32,240 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 15:25:32,245 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 15:25:32,246 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 15:25:32,246 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 15:25:32,247 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 15:25:32,272 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 15:25:32,272 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 15:25:32,273 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 15:25:32,274 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 15:25:32,274 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 15:25:32,274 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 15:25:32,274 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 15:25:32,274 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 15:25:32,274 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 15:25:32,284 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 15:25:32,284 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 15:25:32,285 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 15:25:32,285 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 15:25:32,285 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 15:25:32,285 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 15:25:32,285 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 15:25:32,285 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 15:25:32,285 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 15:25:32,286 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 15:25:32,286 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 15:25:32,286 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:25:32,286 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 15:25:32,286 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 15:25:32,286 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 15:25:32,286 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 15:25:32,286 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 15:25:32,287 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 15:25:32,287 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 15:25:32,287 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 15:25:32,552 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 15:25:32,565 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 15:25:32,566 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 15:25:32,567 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 15:25:32,567 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 15:25:32,568 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound100.c [2021-05-02 15:25:32,624 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57023345d/c541e9d44aa9422b84d3cf06f88367f4/FLAGfec4b6903 [2021-05-02 15:25:32,978 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 15:25:32,979 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound100.c [2021-05-02 15:25:32,985 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57023345d/c541e9d44aa9422b84d3cf06f88367f4/FLAGfec4b6903 [2021-05-02 15:25:32,995 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57023345d/c541e9d44aa9422b84d3cf06f88367f4 [2021-05-02 15:25:32,997 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 15:25:32,998 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 15:25:32,999 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 15:25:32,999 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 15:25:33,001 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 15:25:33,002 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:25:32" (1/1) ... [2021-05-02 15:25:33,002 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7417dd04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:25:33, skipping insertion in model container [2021-05-02 15:25:33,002 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:25:32" (1/1) ... [2021-05-02 15:25:33,007 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 15:25:33,018 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 15:25:33,130 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound100.c[546,559] [2021-05-02 15:25:33,146 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:25:33,153 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 15:25:33,196 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound100.c[546,559] [2021-05-02 15:25:33,209 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:25:33,220 INFO L208 MainTranslator]: Completed translation [2021-05-02 15:25:33,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:25:33 WrapperNode [2021-05-02 15:25:33,221 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 15:25:33,222 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 15:25:33,222 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 15:25:33,223 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 15:25:33,230 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:25:33" (1/1) ... [2021-05-02 15:25:33,231 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:25:33" (1/1) ... [2021-05-02 15:25:33,241 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:25:33" (1/1) ... [2021-05-02 15:25:33,241 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:25:33" (1/1) ... [2021-05-02 15:25:33,251 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:25:33" (1/1) ... [2021-05-02 15:25:33,255 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:25:33" (1/1) ... [2021-05-02 15:25:33,261 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:25:33" (1/1) ... [2021-05-02 15:25:33,262 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 15:25:33,263 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 15:25:33,263 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 15:25:33,263 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 15:25:33,264 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:25:33" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:25:33,334 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 15:25:33,335 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 15:25:33,335 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 15:25:33,335 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 15:25:33,335 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 15:25:33,335 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 15:25:33,335 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 15:25:33,335 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 15:25:33,336 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 15:25:33,336 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 15:25:33,336 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 15:25:33,336 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 15:25:33,336 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 15:25:33,337 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 15:25:33,337 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 15:25:33,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 15:25:33,337 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 15:25:33,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 15:25:33,337 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 15:25:33,337 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 15:25:33,539 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 15:25:33,539 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 15:25:33,540 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:25:33 BoogieIcfgContainer [2021-05-02 15:25:33,540 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 15:25:33,541 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 15:25:33,541 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 15:25:33,543 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 15:25:33,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 03:25:32" (1/3) ... [2021-05-02 15:25:33,543 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@95da31a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:25:33, skipping insertion in model container [2021-05-02 15:25:33,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:25:33" (2/3) ... [2021-05-02 15:25:33,544 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@95da31a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:25:33, skipping insertion in model container [2021-05-02 15:25:33,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:25:33" (3/3) ... [2021-05-02 15:25:33,545 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_unwindbound100.c [2021-05-02 15:25:33,556 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 15:25:33,558 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 15:25:33,568 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 15:25:33,599 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 15:25:33,599 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 15:25:33,600 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 15:25:33,600 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 15:25:33,600 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 15:25:33,600 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 15:25:33,600 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 15:25:33,600 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 15:25:33,628 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 15:25:33,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 15:25:33,632 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:33,633 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:25:33,633 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:33,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:33,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1191571617, now seen corresponding path program 1 times [2021-05-02 15:25:33,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:33,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131169755] [2021-05-02 15:25:33,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:33,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:33,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:25:33,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:33,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:25:33,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:33,853 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 15:25:33,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:33,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131169755] [2021-05-02 15:25:33,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131169755] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:25:33,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:25:33,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 15:25:33,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546930198] [2021-05-02 15:25:33,858 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 15:25:33,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:33,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 15:25:33,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:25:33,869 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 15:25:34,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:34,029 INFO L93 Difference]: Finished difference Result 66 states and 101 transitions. [2021-05-02 15:25:34,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 15:25:34,031 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-02 15:25:34,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:34,035 INFO L225 Difference]: With dead ends: 66 [2021-05-02 15:25:34,036 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 15:25:34,037 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:25:34,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 15:25:34,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-05-02 15:25:34,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 15:25:34,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-02 15:25:34,087 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2021-05-02 15:25:34,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:34,087 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-02 15:25:34,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 15:25:34,087 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-02 15:25:34,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 15:25:34,088 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:34,088 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:25:34,088 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 15:25:34,089 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:34,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:34,089 INFO L82 PathProgramCache]: Analyzing trace with hash 336486197, now seen corresponding path program 1 times [2021-05-02 15:25:34,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:34,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449783496] [2021-05-02 15:25:34,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:34,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:34,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:25:34,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:34,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:25:34,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:34,218 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 15:25:34,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:34,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449783496] [2021-05-02 15:25:34,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449783496] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:25:34,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:25:34,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 15:25:34,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444974851] [2021-05-02 15:25:34,220 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:25:34,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:34,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:25:34,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:25:34,221 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 15:25:34,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:34,458 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2021-05-02 15:25:34,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:25:34,459 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-02 15:25:34,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:34,461 INFO L225 Difference]: With dead ends: 47 [2021-05-02 15:25:34,461 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 15:25:34,462 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 125.7ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:25:34,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 15:25:34,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2021-05-02 15:25:34,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 15:25:34,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2021-05-02 15:25:34,469 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 18 [2021-05-02 15:25:34,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:34,470 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2021-05-02 15:25:34,470 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 15:25:34,470 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2021-05-02 15:25:34,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 15:25:34,470 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:34,470 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:25:34,472 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 15:25:34,473 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:34,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:34,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1819267188, now seen corresponding path program 1 times [2021-05-02 15:25:34,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:34,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405853638] [2021-05-02 15:25:34,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:34,492 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:25:34,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1153203661] [2021-05-02 15:25:34,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:25:34,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:34,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 15:25:34,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:25:34,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:34,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:34,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:34,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:34,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:34,628 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 15:25:34,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:34,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405853638] [2021-05-02 15:25:34,629 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:25:34,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153203661] [2021-05-02 15:25:34,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153203661] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:25:34,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:25:34,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 15:25:34,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857068909] [2021-05-02 15:25:34,629 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 15:25:34,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:34,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 15:25:34,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 15:25:34,630 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 15:25:34,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:34,639 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2021-05-02 15:25:34,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 15:25:34,640 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-02 15:25:34,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:34,640 INFO L225 Difference]: With dead ends: 52 [2021-05-02 15:25:34,640 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 15:25:34,641 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 15:25:34,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 15:25:34,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-02 15:25:34,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 15:25:34,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2021-05-02 15:25:34,661 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 20 [2021-05-02 15:25:34,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:34,661 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2021-05-02 15:25:34,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 15:25:34,661 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2021-05-02 15:25:34,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 15:25:34,662 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:34,662 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:25:34,862 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 15:25:34,863 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:34,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:34,863 INFO L82 PathProgramCache]: Analyzing trace with hash -784889968, now seen corresponding path program 1 times [2021-05-02 15:25:34,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:34,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547021298] [2021-05-02 15:25:34,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:34,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:34,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:25:34,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:34,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:25:34,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:34,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 15:25:34,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:34,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:25:34,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:34,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547021298] [2021-05-02 15:25:34,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547021298] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:25:34,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:25:34,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 15:25:34,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33798577] [2021-05-02 15:25:34,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:25:34,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:34,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:25:34,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:25:34,970 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:25:35,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:35,220 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2021-05-02 15:25:35,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:25:35,220 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 15:25:35,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:35,223 INFO L225 Difference]: With dead ends: 52 [2021-05-02 15:25:35,223 INFO L226 Difference]: Without dead ends: 50 [2021-05-02 15:25:35,224 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 145.9ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:25:35,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-02 15:25:35,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2021-05-02 15:25:35,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 15:25:35,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2021-05-02 15:25:35,243 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2021-05-02 15:25:35,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:35,243 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2021-05-02 15:25:35,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:25:35,243 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2021-05-02 15:25:35,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 15:25:35,245 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:35,245 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:25:35,245 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 15:25:35,245 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:35,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:35,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1024624683, now seen corresponding path program 1 times [2021-05-02 15:25:35,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:35,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314384679] [2021-05-02 15:25:35,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:35,263 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:25:35,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [407155525] [2021-05-02 15:25:35,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:25:35,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:35,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 15:25:35,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:25:35,412 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 15:25:35,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:35,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314384679] [2021-05-02 15:25:35,412 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:25:35,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407155525] [2021-05-02 15:25:35,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407155525] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:25:35,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:25:35,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 15:25:35,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110940311] [2021-05-02 15:25:35,413 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:25:35,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:35,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:25:35,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:25:35,413 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 15:25:35,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:35,533 INFO L93 Difference]: Finished difference Result 75 states and 96 transitions. [2021-05-02 15:25:35,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:25:35,534 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2021-05-02 15:25:35,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:35,536 INFO L225 Difference]: With dead ends: 75 [2021-05-02 15:25:35,536 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 15:25:35,537 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 41.2ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:25:35,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 15:25:35,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-05-02 15:25:35,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 38 states have internal predecessors, (44), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 15:25:35,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 73 transitions. [2021-05-02 15:25:35,558 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 73 transitions. Word has length 28 [2021-05-02 15:25:35,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:35,558 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 73 transitions. [2021-05-02 15:25:35,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 15:25:35,558 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 73 transitions. [2021-05-02 15:25:35,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 15:25:35,559 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:35,559 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:25:35,772 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:25:35,773 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:35,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:35,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1301357193, now seen corresponding path program 1 times [2021-05-02 15:25:35,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:35,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367205335] [2021-05-02 15:25:35,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:35,780 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:25:35,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [654071769] [2021-05-02 15:25:35,780 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 15:25:35,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:35,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 15:25:35,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:25:35,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:35,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:35,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:35,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:35,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:35,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:35,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:35,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:35,950 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 15:25:35,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:35,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367205335] [2021-05-02 15:25:35,950 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:25:35,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654071769] [2021-05-02 15:25:35,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654071769] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:25:35,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:25:35,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 15:25:35,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968365340] [2021-05-02 15:25:35,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 15:25:35,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:35,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 15:25:35,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:25:35,951 INFO L87 Difference]: Start difference. First operand 60 states and 73 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 15:25:35,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:35,977 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2021-05-02 15:25:35,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 15:25:35,978 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2021-05-02 15:25:35,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:35,979 INFO L225 Difference]: With dead ends: 76 [2021-05-02 15:25:35,979 INFO L226 Difference]: Without dead ends: 69 [2021-05-02 15:25:35,979 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 7.0ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:25:35,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-02 15:25:35,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2021-05-02 15:25:35,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 44 states have internal predecessors, (49), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 15:25:35,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2021-05-02 15:25:35,984 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 36 [2021-05-02 15:25:35,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:35,984 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2021-05-02 15:25:35,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 15:25:35,985 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2021-05-02 15:25:35,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 15:25:35,985 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:35,985 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:25:36,200 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:25:36,201 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:36,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:36,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1303085071, now seen corresponding path program 1 times [2021-05-02 15:25:36,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:36,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038560535] [2021-05-02 15:25:36,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:36,208 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:25:36,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2065729954] [2021-05-02 15:25:36,208 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 15:25:36,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:36,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 15:25:36,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:25:36,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:36,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:36,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:36,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:36,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:36,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:36,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:36,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:36,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:36,424 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 15:25:36,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:36,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038560535] [2021-05-02 15:25:36,424 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:25:36,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065729954] [2021-05-02 15:25:36,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065729954] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:25:36,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:25:36,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 15:25:36,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640170238] [2021-05-02 15:25:36,425 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 15:25:36,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:36,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 15:25:36,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:25:36,425 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:25:36,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:36,532 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2021-05-02 15:25:36,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 15:25:36,532 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2021-05-02 15:25:36,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:36,533 INFO L225 Difference]: With dead ends: 74 [2021-05-02 15:25:36,533 INFO L226 Difference]: Without dead ends: 58 [2021-05-02 15:25:36,533 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 89.9ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:25:36,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-02 15:25:36,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-05-02 15:25:36,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 37 states have internal predecessors, (42), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 15:25:36,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2021-05-02 15:25:36,538 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 36 [2021-05-02 15:25:36,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:36,538 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2021-05-02 15:25:36,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:25:36,538 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2021-05-02 15:25:36,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 15:25:36,539 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:36,539 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:25:36,756 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:25:36,757 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:36,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:36,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1189074514, now seen corresponding path program 1 times [2021-05-02 15:25:36,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:36,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105767539] [2021-05-02 15:25:36,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:36,764 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:25:36,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1198666480] [2021-05-02 15:25:36,764 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 15:25:36,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:36,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 15:25:36,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:25:36,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:36,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:36,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:36,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:36,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:36,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:36,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:36,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:36,933 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 15:25:36,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:36,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105767539] [2021-05-02 15:25:36,933 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:25:36,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198666480] [2021-05-02 15:25:36,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198666480] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:25:36,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:25:36,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 15:25:36,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439680548] [2021-05-02 15:25:36,934 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 15:25:36,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:36,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 15:25:36,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:25:36,934 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 15:25:36,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:36,971 INFO L93 Difference]: Finished difference Result 74 states and 88 transitions. [2021-05-02 15:25:36,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 15:25:36,971 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 38 [2021-05-02 15:25:36,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:36,972 INFO L225 Difference]: With dead ends: 74 [2021-05-02 15:25:36,972 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 15:25:36,972 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.7ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:25:36,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 15:25:36,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-05-02 15:25:36,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 39 states have internal predecessors, (44), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 15:25:36,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2021-05-02 15:25:36,977 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 38 [2021-05-02 15:25:36,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:36,977 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2021-05-02 15:25:36,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 15:25:36,977 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2021-05-02 15:25:36,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 15:25:36,978 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:36,978 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:25:37,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:25:37,196 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:37,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:37,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1861890039, now seen corresponding path program 1 times [2021-05-02 15:25:37,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:37,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795917111] [2021-05-02 15:25:37,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:37,218 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:25:37,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2085800054] [2021-05-02 15:25:37,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:25:37,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:37,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 15:25:37,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:25:37,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:37,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:37,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:37,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:37,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:37,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:37,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:37,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:37,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:37,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:37,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:37,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:37,450 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 15:25:37,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:37,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795917111] [2021-05-02 15:25:37,450 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:25:37,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085800054] [2021-05-02 15:25:37,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085800054] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:25:37,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:25:37,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 15:25:37,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609859930] [2021-05-02 15:25:37,452 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 15:25:37,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:37,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 15:25:37,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:25:37,453 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 15:25:37,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:37,653 INFO L93 Difference]: Finished difference Result 101 states and 128 transitions. [2021-05-02 15:25:37,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 15:25:37,655 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 46 [2021-05-02 15:25:37,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:37,655 INFO L225 Difference]: With dead ends: 101 [2021-05-02 15:25:37,655 INFO L226 Difference]: Without dead ends: 86 [2021-05-02 15:25:37,656 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 70.3ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 15:25:37,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-02 15:25:37,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2021-05-02 15:25:37,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 52 states have (on average 1.1923076923076923) internal successors, (62), 54 states have internal predecessors, (62), 21 states have call successors, (21), 11 states have call predecessors, (21), 10 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 15:25:37,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 101 transitions. [2021-05-02 15:25:37,663 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 101 transitions. Word has length 46 [2021-05-02 15:25:37,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:37,663 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 101 transitions. [2021-05-02 15:25:37,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 15:25:37,663 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 101 transitions. [2021-05-02 15:25:37,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 15:25:37,664 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:37,664 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:25:37,869 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:25:37,869 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:37,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:37,869 INFO L82 PathProgramCache]: Analyzing trace with hash 243046571, now seen corresponding path program 1 times [2021-05-02 15:25:37,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:37,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270928522] [2021-05-02 15:25:37,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:37,875 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:25:37,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1117039363] [2021-05-02 15:25:37,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:25:37,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:37,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 15:25:37,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:25:37,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:37,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:37,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:37,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:37,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:37,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:37,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:37,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:37,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:37,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:37,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:38,003 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 15:25:38,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:38,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270928522] [2021-05-02 15:25:38,003 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:25:38,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117039363] [2021-05-02 15:25:38,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117039363] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:25:38,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:25:38,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 15:25:38,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74365203] [2021-05-02 15:25:38,004 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:25:38,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:38,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:25:38,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:25:38,004 INFO L87 Difference]: Start difference. First operand 84 states and 101 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 15:25:38,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:38,057 INFO L93 Difference]: Finished difference Result 101 states and 116 transitions. [2021-05-02 15:25:38,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 15:25:38,057 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 54 [2021-05-02 15:25:38,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:38,060 INFO L225 Difference]: With dead ends: 101 [2021-05-02 15:25:38,060 INFO L226 Difference]: Without dead ends: 93 [2021-05-02 15:25:38,060 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 8.8ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:25:38,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-02 15:25:38,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-05-02 15:25:38,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 60 states have internal predecessors, (67), 21 states have call successors, (21), 13 states have call predecessors, (21), 12 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 15:25:38,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 106 transitions. [2021-05-02 15:25:38,075 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 106 transitions. Word has length 54 [2021-05-02 15:25:38,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:38,076 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 106 transitions. [2021-05-02 15:25:38,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 15:25:38,076 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 106 transitions. [2021-05-02 15:25:38,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 15:25:38,077 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:38,077 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:25:38,293 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 15:25:38,293 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:38,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:38,293 INFO L82 PathProgramCache]: Analyzing trace with hash 244774449, now seen corresponding path program 1 times [2021-05-02 15:25:38,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:38,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138037145] [2021-05-02 15:25:38,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:38,299 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:25:38,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [168712416] [2021-05-02 15:25:38,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:25:38,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:38,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 15:25:38,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:25:38,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:38,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:38,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:38,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:38,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:38,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:38,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:38,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:38,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:38,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:38,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:38,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:38,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:38,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:38,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:38,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:38,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:38,633 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 15:25:38,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:38,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138037145] [2021-05-02 15:25:38,633 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:25:38,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168712416] [2021-05-02 15:25:38,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168712416] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:25:38,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:25:38,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 15:25:38,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249258550] [2021-05-02 15:25:38,633 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 15:25:38,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:38,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 15:25:38,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:25:38,634 INFO L87 Difference]: Start difference. First operand 92 states and 106 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 15:25:38,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:38,830 INFO L93 Difference]: Finished difference Result 98 states and 111 transitions. [2021-05-02 15:25:38,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 15:25:38,831 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 54 [2021-05-02 15:25:38,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:38,832 INFO L225 Difference]: With dead ends: 98 [2021-05-02 15:25:38,832 INFO L226 Difference]: Without dead ends: 90 [2021-05-02 15:25:38,832 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 143.2ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-02 15:25:38,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-05-02 15:25:38,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-05-02 15:25:38,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 58 states have (on average 1.1206896551724137) internal successors, (65), 59 states have internal predecessors, (65), 18 states have call successors, (18), 14 states have call predecessors, (18), 13 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 15:25:38,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2021-05-02 15:25:38,838 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 54 [2021-05-02 15:25:38,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:38,838 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2021-05-02 15:25:38,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 15:25:38,838 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2021-05-02 15:25:38,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-02 15:25:38,839 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:38,839 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:25:39,052 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-02 15:25:39,055 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:39,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:39,055 INFO L82 PathProgramCache]: Analyzing trace with hash -318333104, now seen corresponding path program 2 times [2021-05-02 15:25:39,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:39,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116733009] [2021-05-02 15:25:39,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:39,062 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:25:39,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2143913797] [2021-05-02 15:25:39,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:25:39,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-05-02 15:25:39,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:25:39,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 15:25:39,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:25:39,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:39,204 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-05-02 15:25:39,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:39,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116733009] [2021-05-02 15:25:39,204 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:25:39,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143913797] [2021-05-02 15:25:39,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143913797] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:25:39,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:25:39,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 15:25:39,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776329534] [2021-05-02 15:25:39,205 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 15:25:39,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:39,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 15:25:39,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 15:25:39,205 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:25:39,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:39,261 INFO L93 Difference]: Finished difference Result 104 states and 118 transitions. [2021-05-02 15:25:39,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:25:39,261 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 56 [2021-05-02 15:25:39,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:39,262 INFO L225 Difference]: With dead ends: 104 [2021-05-02 15:25:39,262 INFO L226 Difference]: Without dead ends: 102 [2021-05-02 15:25:39,263 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 25.8ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:25:39,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-05-02 15:25:39,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2021-05-02 15:25:39,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 67 states have internal predecessors, (75), 21 states have call successors, (21), 15 states have call predecessors, (21), 14 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 15:25:39,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 115 transitions. [2021-05-02 15:25:39,270 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 115 transitions. Word has length 56 [2021-05-02 15:25:39,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:39,270 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 115 transitions. [2021-05-02 15:25:39,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:25:39,270 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 115 transitions. [2021-05-02 15:25:39,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 15:25:39,271 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:39,271 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:25:39,486 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:25:39,486 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:39,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:39,486 INFO L82 PathProgramCache]: Analyzing trace with hash 940283669, now seen corresponding path program 1 times [2021-05-02 15:25:39,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:39,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9399397] [2021-05-02 15:25:39,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:39,492 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:25:39,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2066876053] [2021-05-02 15:25:39,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 15:25:39,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:39,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 15:25:39,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:25:39,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:39,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:39,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:39,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:39,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:39,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:39,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:39,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:39,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:39,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:39,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:39,644 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 36 proven. 46 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-05-02 15:25:39,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:39,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9399397] [2021-05-02 15:25:39,644 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:25:39,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066876053] [2021-05-02 15:25:39,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066876053] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:25:39,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:25:39,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 15:25:39,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037538523] [2021-05-02 15:25:39,645 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:25:39,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:39,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:25:39,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:25:39,645 INFO L87 Difference]: Start difference. First operand 101 states and 115 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 15:25:39,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:39,689 INFO L93 Difference]: Finished difference Result 128 states and 153 transitions. [2021-05-02 15:25:39,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:25:39,689 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) Word has length 61 [2021-05-02 15:25:39,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:39,691 INFO L225 Difference]: With dead ends: 128 [2021-05-02 15:25:39,691 INFO L226 Difference]: Without dead ends: 103 [2021-05-02 15:25:39,693 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 17.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:25:39,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-05-02 15:25:39,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-05-02 15:25:39,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 67 states have (on average 1.1492537313432836) internal successors, (77), 69 states have internal predecessors, (77), 21 states have call successors, (21), 15 states have call predecessors, (21), 14 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 15:25:39,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 117 transitions. [2021-05-02 15:25:39,701 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 117 transitions. Word has length 61 [2021-05-02 15:25:39,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:39,702 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 117 transitions. [2021-05-02 15:25:39,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 15:25:39,702 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 117 transitions. [2021-05-02 15:25:39,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-02 15:25:39,703 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:39,703 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:25:39,912 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:25:39,913 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:39,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:39,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1995039641, now seen corresponding path program 2 times [2021-05-02 15:25:39,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:39,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745818875] [2021-05-02 15:25:39,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:39,918 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:25:39,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [489160977] [2021-05-02 15:25:39,919 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 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 15:25:39,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:25:39,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:25:39,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-02 15:25:39,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:25:40,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:40,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:40,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:40,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:40,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:40,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:40,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:40,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:40,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:40,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:40,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:40,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:40,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:40,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:40,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:40,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:40,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:40,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:40,252 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 43 proven. 34 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-05-02 15:25:40,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:40,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745818875] [2021-05-02 15:25:40,252 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:25:40,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489160977] [2021-05-02 15:25:40,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489160977] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:25:40,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:25:40,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 15:25:40,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670597836] [2021-05-02 15:25:40,253 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 15:25:40,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:40,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 15:25:40,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-02 15:25:40,253 INFO L87 Difference]: Start difference. First operand 103 states and 117 transitions. Second operand has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 10 states have internal predecessors, (24), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 15:25:40,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:40,552 INFO L93 Difference]: Finished difference Result 163 states and 207 transitions. [2021-05-02 15:25:40,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 15:25:40,553 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 10 states have internal predecessors, (24), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) Word has length 64 [2021-05-02 15:25:40,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:40,553 INFO L225 Difference]: With dead ends: 163 [2021-05-02 15:25:40,553 INFO L226 Difference]: Without dead ends: 131 [2021-05-02 15:25:40,554 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 119.9ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-05-02 15:25:40,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-05-02 15:25:40,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 125. [2021-05-02 15:25:40,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 80 states have (on average 1.175) internal successors, (94), 83 states have internal predecessors, (94), 28 states have call successors, (28), 17 states have call predecessors, (28), 16 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-02 15:25:40,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 148 transitions. [2021-05-02 15:25:40,561 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 148 transitions. Word has length 64 [2021-05-02 15:25:40,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:40,561 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 148 transitions. [2021-05-02 15:25:40,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 10 states have internal predecessors, (24), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 15:25:40,562 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 148 transitions. [2021-05-02 15:25:40,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 15:25:40,562 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:40,562 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:25:40,777 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 15:25:40,777 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:40,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:40,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1140868055, now seen corresponding path program 1 times [2021-05-02 15:25:40,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:40,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239516196] [2021-05-02 15:25:40,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:40,783 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:25:40,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [932978188] [2021-05-02 15:25:40,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 15:25:40,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:40,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 15:25:40,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:25:40,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:40,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:40,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:40,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:40,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:40,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:40,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:40,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:40,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:40,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:40,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:40,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:40,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:40,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:40,949 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 16 proven. 92 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 15:25:40,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:40,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239516196] [2021-05-02 15:25:40,949 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:25:40,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932978188] [2021-05-02 15:25:40,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932978188] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:25:40,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:25:40,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 15:25:40,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497261494] [2021-05-02 15:25:40,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 15:25:40,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:40,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 15:25:40,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 15:25:40,950 INFO L87 Difference]: Start difference. First operand 125 states and 148 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 15:25:41,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:41,013 INFO L93 Difference]: Finished difference Result 151 states and 173 transitions. [2021-05-02 15:25:41,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:25:41,014 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 68 [2021-05-02 15:25:41,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:41,015 INFO L225 Difference]: With dead ends: 151 [2021-05-02 15:25:41,015 INFO L226 Difference]: Without dead ends: 138 [2021-05-02 15:25:41,015 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 25.7ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:25:41,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-05-02 15:25:41,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2021-05-02 15:25:41,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 90 states have (on average 1.1444444444444444) internal successors, (103), 92 states have internal predecessors, (103), 28 states have call successors, (28), 19 states have call predecessors, (28), 18 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-02 15:25:41,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 157 transitions. [2021-05-02 15:25:41,022 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 157 transitions. Word has length 68 [2021-05-02 15:25:41,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:41,022 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 157 transitions. [2021-05-02 15:25:41,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 15:25:41,022 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 157 transitions. [2021-05-02 15:25:41,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 15:25:41,022 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:41,022 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:25:41,237 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-02 15:25:41,238 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:41,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:41,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1142595933, now seen corresponding path program 1 times [2021-05-02 15:25:41,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:41,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815100558] [2021-05-02 15:25:41,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:41,250 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:25:41,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [63621858] [2021-05-02 15:25:41,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 15:25:41,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:41,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 15:25:41,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:25:41,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:41,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:41,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:41,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:41,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:41,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:41,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:41,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:41,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:41,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:41,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:41,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:41,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:41,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:41,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:41,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:41,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:41,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:41,571 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-05-02 15:25:41,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:41,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815100558] [2021-05-02 15:25:41,572 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:25:41,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63621858] [2021-05-02 15:25:41,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63621858] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:25:41,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:25:41,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 15:25:41,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036964443] [2021-05-02 15:25:41,572 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 15:25:41,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:41,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 15:25:41,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:25:41,573 INFO L87 Difference]: Start difference. First operand 137 states and 157 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 15:25:41,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:41,731 INFO L93 Difference]: Finished difference Result 151 states and 176 transitions. [2021-05-02 15:25:41,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 15:25:41,731 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 68 [2021-05-02 15:25:41,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:41,733 INFO L225 Difference]: With dead ends: 151 [2021-05-02 15:25:41,733 INFO L226 Difference]: Without dead ends: 149 [2021-05-02 15:25:41,733 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 106.1ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-02 15:25:41,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-05-02 15:25:41,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 147. [2021-05-02 15:25:41,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 97 states have (on average 1.1649484536082475) internal successors, (113), 99 states have internal predecessors, (113), 30 states have call successors, (30), 20 states have call predecessors, (30), 19 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-02 15:25:41,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 171 transitions. [2021-05-02 15:25:41,743 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 171 transitions. Word has length 68 [2021-05-02 15:25:41,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:41,744 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 171 transitions. [2021-05-02 15:25:41,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 15:25:41,744 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 171 transitions. [2021-05-02 15:25:41,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-02 15:25:41,744 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:41,744 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:25:41,964 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 15:25:41,965 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:41,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:41,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1390565976, now seen corresponding path program 2 times [2021-05-02 15:25:41,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:41,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575928995] [2021-05-02 15:25:41,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:41,973 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:25:41,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1869464066] [2021-05-02 15:25:41,973 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 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 15:25:42,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:25:42,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:25:42,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 15:25:42,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:25:42,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:42,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:42,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:42,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:42,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:42,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:42,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:42,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:42,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:42,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:42,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:42,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:42,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:42,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:42,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:42,349 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 46 proven. 24 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-05-02 15:25:42,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:42,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575928995] [2021-05-02 15:25:42,349 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:25:42,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869464066] [2021-05-02 15:25:42,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869464066] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:25:42,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:25:42,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 15:25:42,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445982968] [2021-05-02 15:25:42,351 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 15:25:42,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:42,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 15:25:42,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:25:42,352 INFO L87 Difference]: Start difference. First operand 147 states and 171 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2021-05-02 15:25:42,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:42,579 INFO L93 Difference]: Finished difference Result 174 states and 206 transitions. [2021-05-02 15:25:42,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 15:25:42,579 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) Word has length 73 [2021-05-02 15:25:42,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:42,580 INFO L225 Difference]: With dead ends: 174 [2021-05-02 15:25:42,580 INFO L226 Difference]: Without dead ends: 149 [2021-05-02 15:25:42,581 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 117.4ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 15:25:42,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-05-02 15:25:42,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2021-05-02 15:25:42,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 97 states have (on average 1.134020618556701) internal successors, (110), 100 states have internal predecessors, (110), 31 states have call successors, (31), 21 states have call predecessors, (31), 20 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-02 15:25:42,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 169 transitions. [2021-05-02 15:25:42,590 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 169 transitions. Word has length 73 [2021-05-02 15:25:42,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:42,590 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 169 transitions. [2021-05-02 15:25:42,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2021-05-02 15:25:42,591 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 169 transitions. [2021-05-02 15:25:42,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-02 15:25:42,592 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:42,592 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:25:42,807 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:25:42,807 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:42,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:42,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1792978632, now seen corresponding path program 1 times [2021-05-02 15:25:42,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:42,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392400792] [2021-05-02 15:25:42,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:42,812 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:25:42,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1541138976] [2021-05-02 15:25:42,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 15:25:42,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:42,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 15:25:42,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:25:42,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:42,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:42,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:42,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:42,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:42,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:42,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:42,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:42,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:42,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:43,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:43,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:43,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:43,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:43,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:43,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:43,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:43,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:43,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:43,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:43,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:43,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:43,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:43,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:43,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:43,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:43,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:43,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:43,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:50,031 WARN L205 SmtUtils]: Spent 6.51 s on a formula simplification. DAG size of input: 89 DAG size of output: 80 [2021-05-02 15:25:50,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:50,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:50,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:50,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:50,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:50,493 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-05-02 15:25:50,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:50,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:51,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:51,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:51,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:51,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:51,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:51,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:51,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:51,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:51,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:51,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:51,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:51,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:51,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:51,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:51,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:51,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:51,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:51,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:51,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:51,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:51,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:51,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:52,102 WARN L159 QuantifierPusher]: Ignoring assumption.