/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-u_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 15:31:25,397 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 15:31:25,399 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 15:31:25,432 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 15:31:25,448 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 15:31:25,449 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 15:31:25,449 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 15:31:25,450 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 15:31:25,450 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 15:31:25,451 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 15:31:25,452 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 15:31:25,453 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 15:31:25,454 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 15:31:25,456 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 15:31:25,459 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 15:31:25,461 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 15:31:25,467 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 15:31:25,473 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 15:31:25,475 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 15:31:25,476 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 15:31:25,477 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 15:31:25,522 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 15:31:25,522 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 15:31:25,525 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 15:31:25,525 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 15:31:25,525 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 15:31:25,525 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 15:31:25,526 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 15:31:25,526 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 15:31:25,526 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 15:31:25,526 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 15:31:25,527 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 15:31:25,527 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 15:31:25,527 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 15:31:25,527 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 15:31:25,527 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 15:31:25,527 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 15:31:25,527 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 15:31:25,527 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 15:31:25,527 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 15:31:25,527 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 15:31:25,528 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:31:25,528 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 15:31:25,528 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 15:31:25,528 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 15:31:25,528 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 15:31:25,528 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 15:31:25,528 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 15:31:25,528 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 15:31:25,528 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 15:31:25,758 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 15:31:25,772 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 15:31:25,773 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 15:31:25,774 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 15:31:25,774 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 15:31:25,775 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound50.c [2021-05-02 15:31:25,811 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54d70ba55/36b73beb5ca847bc80e774c86afdb1d7/FLAGc2ef5df25 [2021-05-02 15:31:26,159 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 15:31:26,161 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound50.c [2021-05-02 15:31:26,166 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54d70ba55/36b73beb5ca847bc80e774c86afdb1d7/FLAGc2ef5df25 [2021-05-02 15:31:26,600 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54d70ba55/36b73beb5ca847bc80e774c86afdb1d7 [2021-05-02 15:31:26,602 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 15:31:26,603 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 15:31:26,604 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 15:31:26,604 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 15:31:26,606 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 15:31:26,606 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:31:26" (1/1) ... [2021-05-02 15:31:26,608 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@399041cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:31:26, skipping insertion in model container [2021-05-02 15:31:26,608 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:31:26" (1/1) ... [2021-05-02 15:31:26,613 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 15:31:26,625 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 15:31:26,714 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-u_unwindbound50.c[545,558] [2021-05-02 15:31:26,723 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:31:26,728 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 15:31:26,735 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-u_unwindbound50.c[545,558] [2021-05-02 15:31:26,740 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:31:26,748 INFO L208 MainTranslator]: Completed translation [2021-05-02 15:31:26,748 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:31:26 WrapperNode [2021-05-02 15:31:26,748 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 15:31:26,749 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 15:31:26,749 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 15:31:26,749 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 15:31:26,790 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:31:26" (1/1) ... [2021-05-02 15:31:26,790 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:31:26" (1/1) ... [2021-05-02 15:31:26,800 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:31:26" (1/1) ... [2021-05-02 15:31:26,800 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:31:26" (1/1) ... [2021-05-02 15:31:26,803 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:31:26" (1/1) ... [2021-05-02 15:31:26,806 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:31:26" (1/1) ... [2021-05-02 15:31:26,806 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:31:26" (1/1) ... [2021-05-02 15:31:26,808 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 15:31:26,808 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 15:31:26,808 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 15:31:26,808 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 15:31:26,809 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:31:26" (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 15:31:26,898 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 15:31:26,898 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 15:31:26,899 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 15:31:26,899 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 15:31:26,899 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 15:31:26,899 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 15:31:26,899 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 15:31:26,899 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 15:31:26,900 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 15:31:26,900 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 15:31:26,900 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 15:31:26,900 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 15:31:26,901 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 15:31:26,901 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 15:31:26,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 15:31:26,902 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 15:31:26,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 15:31:26,902 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 15:31:26,902 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 15:31:26,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 15:31:27,139 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 15:31:27,139 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 15:31:27,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:31:27 BoogieIcfgContainer [2021-05-02 15:31:27,140 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 15:31:27,141 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 15:31:27,141 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 15:31:27,143 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 15:31:27,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 03:31:26" (1/3) ... [2021-05-02 15:31:27,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c02e12f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:31:27, skipping insertion in model container [2021-05-02 15:31:27,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:31:26" (2/3) ... [2021-05-02 15:31:27,144 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c02e12f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:31:27, skipping insertion in model container [2021-05-02 15:31:27,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:31:27" (3/3) ... [2021-05-02 15:31:27,161 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_unwindbound50.c [2021-05-02 15:31:27,164 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 15:31:27,167 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 15:31:27,178 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 15:31:27,200 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 15:31:27,200 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 15:31:27,200 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 15:31:27,200 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 15:31:27,200 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 15:31:27,200 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 15:31:27,200 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 15:31:27,200 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 15:31:27,213 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 15:31:27,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 15:31:27,216 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:31:27,217 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 15:31:27,217 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:31:27,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:31:27,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1191571617, now seen corresponding path program 1 times [2021-05-02 15:31:27,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:31:27,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315194880] [2021-05-02 15:31:27,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:31:27,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:31:27,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:31:27,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:31:27,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:31:27,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:31:27,368 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 15:31:27,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:31:27,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315194880] [2021-05-02 15:31:27,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315194880] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:31:27,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:31:27,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 15:31:27,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019443265] [2021-05-02 15:31:27,372 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 15:31:27,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:31:27,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 15:31:27,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:31:27,381 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 15:31:27,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:31:27,500 INFO L93 Difference]: Finished difference Result 66 states and 101 transitions. [2021-05-02 15:31:27,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 15:31:27,502 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 15:31:27,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:31:27,506 INFO L225 Difference]: With dead ends: 66 [2021-05-02 15:31:27,506 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 15:31:27,508 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:31:27,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 15:31:27,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-05-02 15:31:27,561 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 15:31:27,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-02 15:31:27,563 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2021-05-02 15:31:27,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:31:27,563 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-02 15:31:27,564 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 15:31:27,564 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-02 15:31:27,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 15:31:27,564 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:31:27,564 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 15:31:27,565 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 15:31:27,565 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:31:27,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:31:27,568 INFO L82 PathProgramCache]: Analyzing trace with hash 336486197, now seen corresponding path program 1 times [2021-05-02 15:31:27,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:31:27,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674491961] [2021-05-02 15:31:27,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:31:27,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:31:27,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:31:27,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:31:27,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:31:27,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:31:27,655 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 15:31:27,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:31:27,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674491961] [2021-05-02 15:31:27,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674491961] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:31:27,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:31:27,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 15:31:27,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002470886] [2021-05-02 15:31:27,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:31:27,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:31:27,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:31:27,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:31:27,657 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 15:31:27,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:31:27,887 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2021-05-02 15:31:27,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:31:27,887 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 15:31:27,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:31:27,888 INFO L225 Difference]: With dead ends: 47 [2021-05-02 15:31:27,888 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 15:31:27,889 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 122.7ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:31:27,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 15:31:27,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2021-05-02 15:31:27,896 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 15:31:27,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2021-05-02 15:31:27,897 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 18 [2021-05-02 15:31:27,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:31:27,897 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2021-05-02 15:31:27,897 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 15:31:27,897 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2021-05-02 15:31:27,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 15:31:27,898 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:31:27,898 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 15:31:27,898 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 15:31:27,898 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:31:27,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:31:27,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1819267188, now seen corresponding path program 1 times [2021-05-02 15:31:27,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:31:27,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084454560] [2021-05-02 15:31:27,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:31:27,910 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:31:27,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1185295389] [2021-05-02 15:31:27,911 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 15:31:27,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:31:27,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 15:31:27,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:31:27,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:27,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:27,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:28,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:28,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:28,035 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 15:31:28,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:31:28,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084454560] [2021-05-02 15:31:28,036 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:31:28,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185295389] [2021-05-02 15:31:28,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185295389] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:31:28,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:31:28,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 15:31:28,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216070605] [2021-05-02 15:31:28,036 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 15:31:28,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:31:28,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 15:31:28,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 15:31:28,037 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 15:31:28,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:31:28,048 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2021-05-02 15:31:28,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 15:31:28,048 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 15:31:28,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:31:28,049 INFO L225 Difference]: With dead ends: 52 [2021-05-02 15:31:28,049 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 15:31:28,049 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 15:31:28,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 15:31:28,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-02 15:31:28,053 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 15:31:28,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2021-05-02 15:31:28,054 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 20 [2021-05-02 15:31:28,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:31:28,054 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2021-05-02 15:31:28,055 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 15:31:28,055 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2021-05-02 15:31:28,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 15:31:28,055 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:31:28,055 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 15:31:28,269 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 15:31:28,269 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:31:28,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:31:28,270 INFO L82 PathProgramCache]: Analyzing trace with hash -784889968, now seen corresponding path program 1 times [2021-05-02 15:31:28,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:31:28,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968413191] [2021-05-02 15:31:28,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:31:28,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:31:28,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:31:28,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:31:28,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:31:28,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:31:28,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 15:31:28,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:31:28,354 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 15:31:28,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:31:28,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968413191] [2021-05-02 15:31:28,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968413191] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:31:28,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:31:28,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 15:31:28,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10935194] [2021-05-02 15:31:28,355 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:31:28,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:31:28,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:31:28,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:31:28,355 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 15:31:28,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:31:28,537 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2021-05-02 15:31:28,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:31:28,537 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 15:31:28,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:31:28,538 INFO L225 Difference]: With dead ends: 52 [2021-05-02 15:31:28,538 INFO L226 Difference]: Without dead ends: 50 [2021-05-02 15:31:28,538 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 107.8ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:31:28,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-02 15:31:28,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2021-05-02 15:31:28,542 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 15:31:28,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2021-05-02 15:31:28,543 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2021-05-02 15:31:28,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:31:28,543 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2021-05-02 15:31:28,543 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 15:31:28,543 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2021-05-02 15:31:28,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 15:31:28,544 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:31:28,544 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 15:31:28,544 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 15:31:28,544 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:31:28,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:31:28,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1024624683, now seen corresponding path program 1 times [2021-05-02 15:31:28,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:31:28,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530307501] [2021-05-02 15:31:28,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:31:28,554 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:31:28,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1389757667] [2021-05-02 15:31:28,554 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 15:31:28,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:31:28,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 15:31:28,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:31:28,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:28,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:28,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:28,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:28,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:28,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:28,719 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 15:31:28,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:31:28,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530307501] [2021-05-02 15:31:28,719 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:31:28,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389757667] [2021-05-02 15:31:28,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389757667] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:31:28,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:31:28,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 15:31:28,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168712733] [2021-05-02 15:31:28,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:31:28,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:31:28,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:31:28,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:31:28,721 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 15:31:28,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:31:28,826 INFO L93 Difference]: Finished difference Result 71 states and 93 transitions. [2021-05-02 15:31:28,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:31:28,827 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-02 15:31:28,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:31:28,834 INFO L225 Difference]: With dead ends: 71 [2021-05-02 15:31:28,834 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 15:31:28,835 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 37.8ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:31:28,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 15:31:28,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-02 15:31:28,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 35 states have internal predecessors, (41), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 15:31:28,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2021-05-02 15:31:28,849 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 28 [2021-05-02 15:31:28,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:31:28,849 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2021-05-02 15:31:28,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 15:31:28,850 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2021-05-02 15:31:28,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 15:31:28,850 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:31:28,850 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 15:31:29,051 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:31:29,051 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:31:29,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:31:29,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1301357193, now seen corresponding path program 1 times [2021-05-02 15:31:29,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:31:29,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308847696] [2021-05-02 15:31:29,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:31:29,061 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:31:29,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [355698770] [2021-05-02 15:31:29,061 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 15:31:29,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:31:29,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 15:31:29,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:31:29,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:29,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:29,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:29,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:29,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:29,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:29,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:29,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:29,168 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 15:31:29,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:31:29,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308847696] [2021-05-02 15:31:29,168 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:31:29,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355698770] [2021-05-02 15:31:29,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355698770] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:31:29,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:31:29,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 15:31:29,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894365458] [2021-05-02 15:31:29,169 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 15:31:29,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:31:29,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 15:31:29,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:31:29,169 INFO L87 Difference]: Start difference. First operand 56 states and 70 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 15:31:29,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:31:29,194 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2021-05-02 15:31:29,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 15:31:29,194 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 15:31:29,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:31:29,195 INFO L225 Difference]: With dead ends: 76 [2021-05-02 15:31:29,195 INFO L226 Difference]: Without dead ends: 69 [2021-05-02 15:31:29,195 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 8.0ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:31:29,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-02 15:31:29,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2021-05-02 15:31:29,200 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 15:31:29,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2021-05-02 15:31:29,201 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 36 [2021-05-02 15:31:29,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:31:29,201 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2021-05-02 15:31:29,201 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 15:31:29,201 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2021-05-02 15:31:29,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 15:31:29,202 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:31:29,202 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 15:31:29,417 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:31:29,417 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:31:29,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:31:29,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1303085071, now seen corresponding path program 1 times [2021-05-02 15:31:29,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:31:29,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416816511] [2021-05-02 15:31:29,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:31:29,426 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:31:29,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1408565785] [2021-05-02 15:31:29,427 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 15:31:29,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:31:29,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 15:31:29,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:31:29,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:29,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:29,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:29,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:29,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:29,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:29,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:29,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:29,579 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 15:31:29,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:31:29,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416816511] [2021-05-02 15:31:29,580 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:31:29,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408565785] [2021-05-02 15:31:29,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408565785] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:31:29,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:31:29,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 15:31:29,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113877274] [2021-05-02 15:31:29,580 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 15:31:29,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:31:29,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 15:31:29,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:31:29,581 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 15:31:29,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:31:29,687 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2021-05-02 15:31:29,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 15:31:29,687 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 15:31:29,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:31:29,688 INFO L225 Difference]: With dead ends: 74 [2021-05-02 15:31:29,688 INFO L226 Difference]: Without dead ends: 58 [2021-05-02 15:31:29,689 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 61.3ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:31:29,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-02 15:31:29,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-05-02 15:31:29,693 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 15:31:29,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2021-05-02 15:31:29,693 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 36 [2021-05-02 15:31:29,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:31:29,693 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2021-05-02 15:31:29,693 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 15:31:29,693 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2021-05-02 15:31:29,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 15:31:29,694 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:31:29,694 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 15:31:29,909 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:31:29,909 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:31:29,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:31:29,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1189074514, now seen corresponding path program 1 times [2021-05-02 15:31:29,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:31:29,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598103920] [2021-05-02 15:31:29,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:31:29,922 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:31:29,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1978857282] [2021-05-02 15:31:29,922 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 15:31:29,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:31:29,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 15:31:29,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:31:30,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:30,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:30,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:30,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:30,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:30,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:30,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:30,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:30,068 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 15:31:30,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:31:30,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598103920] [2021-05-02 15:31:30,068 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:31:30,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978857282] [2021-05-02 15:31:30,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978857282] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:31:30,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:31:30,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 15:31:30,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165167264] [2021-05-02 15:31:30,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 15:31:30,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:31:30,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 15:31:30,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:31:30,069 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 15:31:30,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:31:30,095 INFO L93 Difference]: Finished difference Result 74 states and 88 transitions. [2021-05-02 15:31:30,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 15:31:30,096 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 15:31:30,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:31:30,096 INFO L225 Difference]: With dead ends: 74 [2021-05-02 15:31:30,096 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 15:31:30,096 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.3ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:31:30,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 15:31:30,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-05-02 15:31:30,100 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 15:31:30,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2021-05-02 15:31:30,101 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 38 [2021-05-02 15:31:30,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:31:30,101 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2021-05-02 15:31:30,101 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 15:31:30,101 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2021-05-02 15:31:30,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 15:31:30,102 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:31:30,102 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 15:31:30,321 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:31:30,321 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:31:30,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:31:30,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1861890039, now seen corresponding path program 1 times [2021-05-02 15:31:30,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:31:30,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223432338] [2021-05-02 15:31:30,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:31:30,328 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:31:30,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1323269549] [2021-05-02 15:31:30,328 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 15:31:30,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:31:30,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 15:31:30,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:31:30,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:30,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:30,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:30,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:30,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:30,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:30,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:30,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:30,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:30,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:30,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:30,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:30,586 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 15:31:30,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:31:30,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223432338] [2021-05-02 15:31:30,587 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:31:30,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323269549] [2021-05-02 15:31:30,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323269549] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:31:30,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:31:30,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 15:31:30,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645378766] [2021-05-02 15:31:30,587 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 15:31:30,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:31:30,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 15:31:30,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:31:30,588 INFO L87 Difference]: Start difference. First operand 60 states and 68 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, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 15:31:30,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:31:30,724 INFO L93 Difference]: Finished difference Result 83 states and 100 transitions. [2021-05-02 15:31:30,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 15:31:30,725 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, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2021-05-02 15:31:30,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:31:30,725 INFO L225 Difference]: With dead ends: 83 [2021-05-02 15:31:30,725 INFO L226 Difference]: Without dead ends: 75 [2021-05-02 15:31:30,726 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 42.2ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:31:30,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-02 15:31:30,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2021-05-02 15:31:30,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 46 states have internal predecessors, (53), 18 states have call successors, (18), 10 states have call predecessors, (18), 9 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 15:31:30,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 87 transitions. [2021-05-02 15:31:30,731 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 87 transitions. Word has length 46 [2021-05-02 15:31:30,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:31:30,731 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 87 transitions. [2021-05-02 15:31:30,731 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, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 15:31:30,731 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 87 transitions. [2021-05-02 15:31:30,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 15:31:30,732 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:31:30,732 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 15:31:30,936 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:31:30,936 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:31:30,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:31:30,937 INFO L82 PathProgramCache]: Analyzing trace with hash 243046571, now seen corresponding path program 1 times [2021-05-02 15:31:30,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:31:30,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149663992] [2021-05-02 15:31:30,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:31:30,943 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:31:30,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2038971359] [2021-05-02 15:31:30,943 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 15:31:30,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:31:30,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 15:31:30,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:31:30,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:30,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:30,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:31,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:31,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:31,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:31,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:31,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:31,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:31,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:31,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:31,087 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 15:31:31,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:31:31,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149663992] [2021-05-02 15:31:31,088 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:31:31,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038971359] [2021-05-02 15:31:31,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038971359] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:31:31,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:31:31,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 15:31:31,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558450521] [2021-05-02 15:31:31,088 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:31:31,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:31:31,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:31:31,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:31:31,089 INFO L87 Difference]: Start difference. First operand 73 states and 87 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 15:31:31,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:31:31,127 INFO L93 Difference]: Finished difference Result 94 states and 105 transitions. [2021-05-02 15:31:31,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 15:31:31,127 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 15:31:31,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:31:31,128 INFO L225 Difference]: With dead ends: 94 [2021-05-02 15:31:31,128 INFO L226 Difference]: Without dead ends: 86 [2021-05-02 15:31:31,129 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 10.3ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:31:31,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-02 15:31:31,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2021-05-02 15:31:31,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 55 states have internal predecessors, (61), 18 states have call successors, (18), 13 states have call predecessors, (18), 12 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 15:31:31,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 95 transitions. [2021-05-02 15:31:31,134 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 95 transitions. Word has length 54 [2021-05-02 15:31:31,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:31:31,134 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 95 transitions. [2021-05-02 15:31:31,134 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 15:31:31,134 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 95 transitions. [2021-05-02 15:31:31,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 15:31:31,135 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:31:31,135 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 15:31:31,352 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 15:31:31,353 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:31:31,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:31:31,353 INFO L82 PathProgramCache]: Analyzing trace with hash 244774449, now seen corresponding path program 1 times [2021-05-02 15:31:31,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:31:31,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164078623] [2021-05-02 15:31:31,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:31:31,359 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:31:31,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [766684153] [2021-05-02 15:31:31,359 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 15:31:31,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:31:31,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 15:31:31,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:31:31,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:31,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:31,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:31,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:31,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:31,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:31,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:31,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:31,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:31,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:31,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:31,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:31,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:31,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:31,619 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 15:31:31,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:31:31,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164078623] [2021-05-02 15:31:31,619 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:31:31,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766684153] [2021-05-02 15:31:31,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766684153] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:31:31,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:31:31,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 15:31:31,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895688730] [2021-05-02 15:31:31,620 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 15:31:31,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:31:31,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 15:31:31,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:31:31,621 INFO L87 Difference]: Start difference. First operand 85 states and 95 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 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 15:31:31,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:31:31,723 INFO L93 Difference]: Finished difference Result 99 states and 114 transitions. [2021-05-02 15:31:31,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 15:31:31,723 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 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 15:31:31,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:31:31,724 INFO L225 Difference]: With dead ends: 99 [2021-05-02 15:31:31,724 INFO L226 Difference]: Without dead ends: 97 [2021-05-02 15:31:31,724 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 43.7ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:31:31,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-05-02 15:31:31,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2021-05-02 15:31:31,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 61 states have (on average 1.1639344262295082) internal successors, (71), 63 states have internal predecessors, (71), 21 states have call successors, (21), 14 states have call predecessors, (21), 13 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 15:31:31,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 111 transitions. [2021-05-02 15:31:31,730 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 111 transitions. Word has length 54 [2021-05-02 15:31:31,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:31:31,730 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 111 transitions. [2021-05-02 15:31:31,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 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 15:31:31,730 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 111 transitions. [2021-05-02 15:31:31,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 15:31:31,731 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:31:31,731 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 15:31:31,936 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-02 15:31:31,936 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:31:31,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:31:31,937 INFO L82 PathProgramCache]: Analyzing trace with hash 940283669, now seen corresponding path program 1 times [2021-05-02 15:31:31,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:31:31,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599910044] [2021-05-02 15:31:31,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:31:31,943 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:31:31,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [743786824] [2021-05-02 15:31:31,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 15:31:32,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:31:32,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 15:31:32,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:31:32,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:32,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:32,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:32,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:32,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:32,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:32,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:32,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:32,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:32,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:32,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:32,133 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 15:31:32,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:31:32,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599910044] [2021-05-02 15:31:32,133 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:31:32,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743786824] [2021-05-02 15:31:32,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743786824] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:31:32,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:31:32,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 15:31:32,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910586415] [2021-05-02 15:31:32,134 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:31:32,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:31:32,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:31:32,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:31:32,134 INFO L87 Difference]: Start difference. First operand 96 states and 111 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 15:31:32,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:31:32,171 INFO L93 Difference]: Finished difference Result 123 states and 149 transitions. [2021-05-02 15:31:32,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:31:32,171 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 15:31:32,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:31:32,173 INFO L225 Difference]: With dead ends: 123 [2021-05-02 15:31:32,173 INFO L226 Difference]: Without dead ends: 98 [2021-05-02 15:31:32,173 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 16.7ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:31:32,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-05-02 15:31:32,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-05-02 15:31:32,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 63 states have (on average 1.1587301587301588) internal successors, (73), 65 states have internal predecessors, (73), 21 states have call successors, (21), 14 states have call predecessors, (21), 13 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 15:31:32,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 113 transitions. [2021-05-02 15:31:32,179 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 113 transitions. Word has length 61 [2021-05-02 15:31:32,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:31:32,179 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 113 transitions. [2021-05-02 15:31:32,179 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 15:31:32,179 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 113 transitions. [2021-05-02 15:31:32,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-02 15:31:32,180 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:31:32,180 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 15:31:32,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:31:32,396 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:31:32,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:31:32,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1995039641, now seen corresponding path program 2 times [2021-05-02 15:31:32,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:31:32,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364764046] [2021-05-02 15:31:32,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:31:32,403 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:31:32,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1397403116] [2021-05-02 15:31:32,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:31:32,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:31:32,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:31:32,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-02 15:31:32,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:31:32,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:32,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:32,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:32,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:32,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:32,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:32,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:32,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:32,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:32,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:32,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:32,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:32,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:32,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:32,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:32,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:32,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:32,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:32,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:32,926 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 15:31:32,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:31:32,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364764046] [2021-05-02 15:31:32,926 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:31:32,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397403116] [2021-05-02 15:31:32,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397403116] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:31:32,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:31:32,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 15:31:32,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572043758] [2021-05-02 15:31:32,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 15:31:32,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:31:32,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 15:31:32,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:31:32,928 INFO L87 Difference]: Start difference. First operand 98 states and 113 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 15:31:33,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:31:33,470 INFO L93 Difference]: Finished difference Result 125 states and 148 transitions. [2021-05-02 15:31:33,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 15:31:33,471 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 64 [2021-05-02 15:31:33,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:31:33,471 INFO L225 Difference]: With dead ends: 125 [2021-05-02 15:31:33,472 INFO L226 Difference]: Without dead ends: 113 [2021-05-02 15:31:33,472 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 79.8ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-05-02 15:31:33,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-05-02 15:31:33,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 110. [2021-05-02 15:31:33,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 69 states have (on average 1.173913043478261) internal successors, (81), 72 states have internal predecessors, (81), 26 states have call successors, (26), 15 states have call predecessors, (26), 14 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 15:31:33,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 131 transitions. [2021-05-02 15:31:33,509 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 131 transitions. Word has length 64 [2021-05-02 15:31:33,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:31:33,510 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 131 transitions. [2021-05-02 15:31:33,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 15:31:33,510 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 131 transitions. [2021-05-02 15:31:33,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 15:31:33,511 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:31:33,511 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 15:31:33,715 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:31:33,716 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:31:33,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:31:33,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1140868055, now seen corresponding path program 1 times [2021-05-02 15:31:33,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:31:33,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182709426] [2021-05-02 15:31:33,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:31:33,728 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:31:33,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [853882616] [2021-05-02 15:31:33,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:31:33,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:31:33,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 15:31:33,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:31:33,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:33,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:33,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:33,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:33,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:33,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:33,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:33,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:33,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:33,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:33,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:33,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:33,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:33,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:33,962 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 15:31:33,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:31:33,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182709426] [2021-05-02 15:31:33,962 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:31:33,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853882616] [2021-05-02 15:31:33,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853882616] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:31:33,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:31:33,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 15:31:33,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690584928] [2021-05-02 15:31:33,963 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 15:31:33,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:31:33,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 15:31:33,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 15:31:33,963 INFO L87 Difference]: Start difference. First operand 110 states and 131 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 15:31:34,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:31:34,022 INFO L93 Difference]: Finished difference Result 146 states and 166 transitions. [2021-05-02 15:31:34,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:31:34,022 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 15:31:34,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:31:34,023 INFO L225 Difference]: With dead ends: 146 [2021-05-02 15:31:34,023 INFO L226 Difference]: Without dead ends: 133 [2021-05-02 15:31:34,023 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 19.4ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:31:34,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-05-02 15:31:34,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2021-05-02 15:31:34,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 87 states have (on average 1.1379310344827587) internal successors, (99), 89 states have internal predecessors, (99), 26 states have call successors, (26), 19 states have call predecessors, (26), 18 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 15:31:34,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 149 transitions. [2021-05-02 15:31:34,029 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 149 transitions. Word has length 68 [2021-05-02 15:31:34,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:31:34,030 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 149 transitions. [2021-05-02 15:31:34,030 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 15:31:34,030 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 149 transitions. [2021-05-02 15:31:34,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 15:31:34,030 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:31:34,030 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 15:31:34,245 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 15:31:34,246 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:31:34,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:31:34,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1142595933, now seen corresponding path program 1 times [2021-05-02 15:31:34,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:31:34,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903962420] [2021-05-02 15:31:34,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:31:34,253 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:31:34,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [227067035] [2021-05-02 15:31:34,253 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 15:31:34,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:31:34,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-02 15:31:34,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:31:34,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:34,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:34,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:34,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:34,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:34,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:34,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:34,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:34,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:34,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:34,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:34,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:34,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:34,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:34,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:34,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:35,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:35,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:35,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:35,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:35,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:35,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:35,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:35,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:35,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:35,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:35,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:22,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:41:22,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903962420] [2021-05-02 15:41:22,340 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:41:22,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227067035] [2021-05-02 15:41:22,341 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: -1072721305 [2021-05-02 15:41:22,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:41:22,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-05-02 15:41:22,341 ERROR L212 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-05-02 15:41:22,341 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 15:41:22,544 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-02 15:41:22,577 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-02 15:41:22,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 03:41:22 BoogieIcfgContainer [2021-05-02 15:41:22,577 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 15:41:22,578 INFO L168 Benchmark]: Toolchain (without parser) took 595975.23 ms. Allocated memory was 177.2 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 142.2 MB in the beginning and 6.6 GB in the end (delta: -6.5 GB). Peak memory consumption was 6.0 GB. Max. memory is 8.0 GB. [2021-05-02 15:41:22,578 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 177.2 MB. Free memory is still 158.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 15:41:22,578 INFO L168 Benchmark]: CACSL2BoogieTranslator took 144.70 ms. Allocated memory is still 177.2 MB. Free memory was 142.0 MB in the beginning and 132.0 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-02 15:41:22,578 INFO L168 Benchmark]: Boogie Preprocessor took 58.77 ms. Allocated memory is still 177.2 MB. Free memory was 132.0 MB in the beginning and 160.1 MB in the end (delta: -28.1 MB). Peak memory consumption was 3.9 MB. Max. memory is 8.0 GB. [2021-05-02 15:41:22,578 INFO L168 Benchmark]: RCFGBuilder took 332.00 ms. Allocated memory is still 177.2 MB. Free memory was 160.1 MB in the beginning and 143.4 MB in the end (delta: 16.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-05-02 15:41:22,578 INFO L168 Benchmark]: TraceAbstraction took 595436.39 ms. Allocated memory was 177.2 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 142.8 MB in the beginning and 6.6 GB in the end (delta: -6.5 GB). Peak memory consumption was 6.0 GB. Max. memory is 8.0 GB. [2021-05-02 15:41:22,579 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 177.2 MB. Free memory is still 158.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 144.70 ms. Allocated memory is still 177.2 MB. Free memory was 142.0 MB in the beginning and 132.0 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 58.77 ms. Allocated memory is still 177.2 MB. Free memory was 132.0 MB in the beginning and 160.1 MB in the end (delta: -28.1 MB). Peak memory consumption was 3.9 MB. Max. memory is 8.0 GB. * RCFGBuilder took 332.00 ms. Allocated memory is still 177.2 MB. Free memory was 160.1 MB in the beginning and 143.4 MB in the end (delta: 16.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 595436.39 ms. Allocated memory was 177.2 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 142.8 MB in the beginning and 6.6 GB in the end (delta: -6.5 GB). Peak memory consumption was 6.0 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L22] int counter = 0; [L24] unsigned int A, B; [L25] unsigned int r, d, p, q; [L26] A = __VERIFIER_nondet_unsigned_int() [L27] B = __VERIFIER_nondet_unsigned_int() [L28] CALL assume_abort_if_not(B >= 1) [L12] COND FALSE !(!cond) [L28] RET assume_abort_if_not(B >= 1) [L30] r = A [L31] d = B [L32] p = 1 [L33] q = 0 [L35] EXPR counter++ [L35] COND TRUE counter++<50 [L36] CALL __VERIFIER_assert(q == 0) [L15] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(q == 0) [L37] CALL __VERIFIER_assert(r == A) [L15] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(r == A) [L38] CALL __VERIFIER_assert(d == B * p) [L15] COND FALSE !(!(cond)) [L38] RET __VERIFIER_assert(d == B * p) [L39] COND FALSE !(!(r >= d)) [L41] d = 2 * d [L42] p = 2 * p [L35] EXPR counter++ [L35] COND TRUE counter++<50 [L36] CALL __VERIFIER_assert(q == 0) [L15] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(q == 0) [L37] CALL __VERIFIER_assert(r == A) [L15] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(r == A) [L38] CALL __VERIFIER_assert(d == B * p) [L15] COND FALSE !(!(cond)) [L38] RET __VERIFIER_assert(d == B * p) [L39] COND TRUE !(r >= d) [L45] EXPR counter++ [L45] COND TRUE counter++<50 [L46] CALL __VERIFIER_assert(A == q*B + r) [L15] COND FALSE !(!(cond)) [L46] RET __VERIFIER_assert(A == q*B + r) [L47] CALL __VERIFIER_assert(d == B*p) [L15] COND FALSE !(!(cond)) [L47] RET __VERIFIER_assert(d == B*p) [L49] COND FALSE !(!(p != 1)) [L51] d = d / 2 [L52] p = p / 2 [L53] COND TRUE r >= d [L54] r = r - d [L55] q = q + p [L45] EXPR counter++ [L45] COND TRUE counter++<50 [L46] CALL __VERIFIER_assert(A == q*B + r) [L15] COND TRUE !(cond) [L17] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 595346.3ms, OverallIterations: 15, TraceHistogramMax: 9, EmptinessCheckTime: 13.3ms, AutomataDifference: 1767.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 596 SDtfs, 273 SDslu, 1877 SDs, 0 SdLazy, 1069 SolverSat, 148 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1108.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 545 GetRequests, 452 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 601.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=132occurred in iteration=14, InterpolantAutomatonStates: 103, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 154.4ms AutomataMinimizationTime, 14 MinimizatonAttempts, 27 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 102.6ms SsaConstructionTime, 703.9ms SatisfiabilityAnalysisTime, 1490.2ms InterpolantComputationTime, 564 NumberOfCodeBlocks, 564 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 550 ConstructedInterpolants, 0 QuantifiedInterpolants, 2003 SizeOfPredicates, 30 NumberOfNonLiveVariables, 1852 ConjunctsInSsa, 158 ConjunctsInUnsatCore, 14 InterpolantComputations, 7 PerfectInterpolantSequences, 438/665 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...