/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/divbin_unwindbound100.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 14:36:49,504 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 14:36:49,506 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 14:36:49,531 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 14:36:49,550 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 14:36:49,551 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 14:36:49,553 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 14:36:49,554 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 14:36:49,558 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 14:36:49,559 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 14:36:49,561 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 14:36:49,566 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 14:36:49,567 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 14:36:49,568 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 14:36:49,571 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 14:36:49,573 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 14:36:49,574 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 14:36:49,581 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 14:36:49,581 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 14:36:49,582 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 14:36:49,583 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 14:36:49,602 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 14:36:49,602 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 14:36:49,603 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 14:36:49,604 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 14:36:49,604 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 14:36:49,604 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 14:36:49,604 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 14:36:49,604 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 14:36:49,604 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 14:36:49,605 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 14:36:49,605 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 14:36:49,605 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 14:36:49,605 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 14:36:49,605 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 14:36:49,605 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 14:36:49,606 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 14:36:49,606 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 14:36:49,606 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 14:36:49,606 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 14:36:49,606 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 14:36:49,606 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 14:36:49,607 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 14:36:49,607 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 14:36:49,607 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 14:36:49,607 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 14:36:49,607 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 14:36:49,607 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 14:36:49,607 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 14:36:49,608 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 14:36:49,934 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 14:36:49,956 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 14:36:49,958 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 14:36:49,959 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 14:36:49,960 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 14:36:49,961 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin_unwindbound100.i [2021-05-02 14:36:50,021 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/618a3f220/a9c8fd16eac34bef8768fd15cb300980/FLAGc1aa83e6a [2021-05-02 14:36:50,530 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 14:36:50,531 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin_unwindbound100.i [2021-05-02 14:36:50,536 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/618a3f220/a9c8fd16eac34bef8768fd15cb300980/FLAGc1aa83e6a [2021-05-02 14:36:51,007 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/618a3f220/a9c8fd16eac34bef8768fd15cb300980 [2021-05-02 14:36:51,009 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 14:36:51,011 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 14:36:51,013 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 14:36:51,013 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 14:36:51,016 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 14:36:51,017 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:36:51" (1/1) ... [2021-05-02 14:36:51,020 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13d71301 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:36:51, skipping insertion in model container [2021-05-02 14:36:51,020 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:36:51" (1/1) ... [2021-05-02 14:36:51,026 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 14:36:51,042 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 14:36:51,138 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/divbin_unwindbound100.i[958,971] [2021-05-02 14:36:51,161 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:36:51,181 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 14:36:51,222 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/divbin_unwindbound100.i[958,971] [2021-05-02 14:36:51,228 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:36:51,239 INFO L208 MainTranslator]: Completed translation [2021-05-02 14:36:51,239 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:36:51 WrapperNode [2021-05-02 14:36:51,240 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 14:36:51,240 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 14:36:51,241 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 14:36:51,241 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 14:36:51,249 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:36:51" (1/1) ... [2021-05-02 14:36:51,249 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:36:51" (1/1) ... [2021-05-02 14:36:51,254 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:36:51" (1/1) ... [2021-05-02 14:36:51,254 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:36:51" (1/1) ... [2021-05-02 14:36:51,258 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:36:51" (1/1) ... [2021-05-02 14:36:51,261 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:36:51" (1/1) ... [2021-05-02 14:36:51,262 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:36:51" (1/1) ... [2021-05-02 14:36:51,264 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 14:36:51,264 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 14:36:51,264 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 14:36:51,265 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 14:36:51,265 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:36:51" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 14:36:51,331 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 14:36:51,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 14:36:51,332 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 14:36:51,333 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 14:36:51,333 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 14:36:51,333 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 14:36:51,333 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 14:36:51,333 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 14:36:51,334 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 14:36:51,334 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 14:36:51,334 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 14:36:51,334 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 14:36:51,335 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 14:36:51,335 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 14:36:51,335 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 14:36:51,335 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 14:36:51,335 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 14:36:51,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 14:36:51,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 14:36:51,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 14:36:51,336 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 14:36:51,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 14:36:51,618 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 14:36:51,618 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 14:36:51,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:36:51 BoogieIcfgContainer [2021-05-02 14:36:51,624 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 14:36:51,625 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 14:36:51,625 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 14:36:51,628 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 14:36:51,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 02:36:51" (1/3) ... [2021-05-02 14:36:51,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5adbf2ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:36:51, skipping insertion in model container [2021-05-02 14:36:51,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:36:51" (2/3) ... [2021-05-02 14:36:51,633 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5adbf2ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:36:51, skipping insertion in model container [2021-05-02 14:36:51,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:36:51" (3/3) ... [2021-05-02 14:36:51,634 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_unwindbound100.i [2021-05-02 14:36:51,639 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 14:36:51,642 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 14:36:51,652 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 14:36:51,668 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 14:36:51,668 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 14:36:51,668 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 14:36:51,668 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 14:36:51,668 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 14:36:51,668 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 14:36:51,668 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 14:36:51,668 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 14:36:51,684 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 14:36:51,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 14:36:51,688 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:36:51,689 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:36:51,689 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:36:51,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:36:51,694 INFO L82 PathProgramCache]: Analyzing trace with hash 878397729, now seen corresponding path program 1 times [2021-05-02 14:36:51,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:36:51,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258542190] [2021-05-02 14:36:51,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:36:51,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:36:51,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 14:36:51,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:36:51,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 14:36:51,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:36:51,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 14:36:51,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:36:51,969 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 14:36:51,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:36:51,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258542190] [2021-05-02 14:36:51,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258542190] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:36:51,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:36:51,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 14:36:51,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203708301] [2021-05-02 14:36:51,976 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 14:36:51,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:36:51,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 14:36:51,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:36:51,990 INFO L87 Difference]: Start difference. First operand has 33 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:36:52,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:36:52,104 INFO L93 Difference]: Finished difference Result 60 states and 84 transitions. [2021-05-02 14:36:52,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 14:36:52,106 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 14:36:52,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:36:52,113 INFO L225 Difference]: With dead ends: 60 [2021-05-02 14:36:52,114 INFO L226 Difference]: Without dead ends: 29 [2021-05-02 14:36:52,118 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 48.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:36:52,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-02 14:36:52,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-05-02 14:36:52,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 14:36:52,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2021-05-02 14:36:52,159 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 23 [2021-05-02 14:36:52,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:36:52,160 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2021-05-02 14:36:52,160 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:36:52,161 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2021-05-02 14:36:52,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-02 14:36:52,162 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:36:52,163 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:36:52,163 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 14:36:52,163 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:36:52,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:36:52,164 INFO L82 PathProgramCache]: Analyzing trace with hash 994169231, now seen corresponding path program 1 times [2021-05-02 14:36:52,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:36:52,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589212282] [2021-05-02 14:36:52,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:36:52,216 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:36:52,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [543276254] [2021-05-02 14:36:52,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:36:52,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:36:52,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 14:36:52,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:36:52,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:52,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:52,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:52,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:52,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:52,427 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 14:36:52,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:36:52,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589212282] [2021-05-02 14:36:52,427 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:36:52,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543276254] [2021-05-02 14:36:52,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543276254] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:36:52,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:36:52,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 14:36:52,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561477864] [2021-05-02 14:36:52,429 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 14:36:52,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:36:52,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 14:36:52,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 14:36:52,430 INFO L87 Difference]: Start difference. First operand 28 states and 34 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:36:52,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:36:52,451 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2021-05-02 14:36:52,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 14:36:52,451 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2021-05-02 14:36:52,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:36:52,452 INFO L225 Difference]: With dead ends: 42 [2021-05-02 14:36:52,453 INFO L226 Difference]: Without dead ends: 30 [2021-05-02 14:36:52,454 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 14:36:52,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-02 14:36:52,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-05-02 14:36:52,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 14:36:52,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2021-05-02 14:36:52,460 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 25 [2021-05-02 14:36:52,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:36:52,461 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2021-05-02 14:36:52,461 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:36:52,461 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2021-05-02 14:36:52,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-02 14:36:52,462 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:36:52,462 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:36:52,685 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 14:36:52,685 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:36:52,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:36:52,686 INFO L82 PathProgramCache]: Analyzing trace with hash 422434646, now seen corresponding path program 1 times [2021-05-02 14:36:52,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:36:52,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632116638] [2021-05-02 14:36:52,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:36:52,702 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:36:52,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1801915598] [2021-05-02 14:36:52,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:36:52,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:36:52,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 14:36:52,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:36:52,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:52,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:52,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:52,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:52,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:52,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:52,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:52,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:52,840 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 14:36:52,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:36:52,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632116638] [2021-05-02 14:36:52,841 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:36:52,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801915598] [2021-05-02 14:36:52,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801915598] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:36:52,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:36:52,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 14:36:52,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472905970] [2021-05-02 14:36:52,842 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 14:36:52,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:36:52,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 14:36:52,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 14:36:52,843 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:36:52,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:36:52,867 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2021-05-02 14:36:52,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 14:36:52,867 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2021-05-02 14:36:52,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:36:52,868 INFO L225 Difference]: With dead ends: 41 [2021-05-02 14:36:52,868 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 14:36:52,869 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 9.1ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 14:36:52,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 14:36:52,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-05-02 14:36:52,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 14:36:52,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2021-05-02 14:36:52,874 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 26 [2021-05-02 14:36:52,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:36:52,874 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2021-05-02 14:36:52,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:36:52,875 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2021-05-02 14:36:52,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-02 14:36:52,875 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:36:52,876 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:36:53,088 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:36:53,089 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:36:53,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:36:53,089 INFO L82 PathProgramCache]: Analyzing trace with hash 424222106, now seen corresponding path program 1 times [2021-05-02 14:36:53,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:36:53,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671049553] [2021-05-02 14:36:53,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:36:53,102 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:36:53,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1771339526] [2021-05-02 14:36:53,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:36:53,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:36:53,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 14:36:53,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:36:53,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:53,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:53,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:53,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:53,349 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 14:36:53,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:36:53,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671049553] [2021-05-02 14:36:53,349 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:36:53,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771339526] [2021-05-02 14:36:53,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771339526] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:36:53,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:36:53,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 14:36:53,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167059437] [2021-05-02 14:36:53,351 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:36:53,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:36:53,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:36:53,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:36:53,352 INFO L87 Difference]: Start difference. First operand 33 states and 40 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, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:36:53,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:36:53,534 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2021-05-02 14:36:53,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:36:53,534 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, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2021-05-02 14:36:53,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:36:53,535 INFO L225 Difference]: With dead ends: 45 [2021-05-02 14:36:53,535 INFO L226 Difference]: Without dead ends: 42 [2021-05-02 14:36:53,536 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 102.6ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:36:53,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-02 14:36:53,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2021-05-02 14:36:53,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 29 states have internal predecessors, (36), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 14:36:53,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2021-05-02 14:36:53,543 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 26 [2021-05-02 14:36:53,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:36:53,543 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2021-05-02 14:36:53,544 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, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:36:53,544 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2021-05-02 14:36:53,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 14:36:53,545 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:36:53,545 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:36:53,745 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:36:53,746 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:36:53,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:36:53,746 INFO L82 PathProgramCache]: Analyzing trace with hash -193375877, now seen corresponding path program 1 times [2021-05-02 14:36:53,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:36:53,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888179406] [2021-05-02 14:36:53,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:36:53,760 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:36:53,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2049354518] [2021-05-02 14:36:53,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:36:53,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:36:53,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 14:36:53,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:36:53,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:53,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:53,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:53,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:53,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:53,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:53,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:53,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:53,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 14:36:53,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:36:53,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888179406] [2021-05-02 14:36:53,927 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:36:53,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049354518] [2021-05-02 14:36:53,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049354518] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:36:53,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:36:53,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 14:36:53,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740516159] [2021-05-02 14:36:53,929 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 14:36:53,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:36:53,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 14:36:53,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 14:36:53,930 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:36:53,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:36:53,974 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2021-05-02 14:36:53,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 14:36:53,975 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2021-05-02 14:36:53,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:36:53,980 INFO L225 Difference]: With dead ends: 55 [2021-05-02 14:36:53,980 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 14:36:53,983 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.7ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:36:53,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 14:36:53,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2021-05-02 14:36:53,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 31 states have internal predecessors, (38), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 14:36:53,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2021-05-02 14:36:53,992 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 28 [2021-05-02 14:36:53,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:36:53,992 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2021-05-02 14:36:53,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:36:53,992 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2021-05-02 14:36:53,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 14:36:53,993 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:36:53,993 INFO L523 BasicCegarLoop]: trace histogram [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 14:36:54,194 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:36:54,194 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:36:54,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:36:54,195 INFO L82 PathProgramCache]: Analyzing trace with hash -2031725334, now seen corresponding path program 1 times [2021-05-02 14:36:54,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:36:54,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306819871] [2021-05-02 14:36:54,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:36:54,211 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:36:54,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [131320569] [2021-05-02 14:36:54,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:36:54,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:36:54,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 14:36:54,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:36:54,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:54,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:54,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:54,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:54,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:54,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:54,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:54,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:54,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:54,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:54,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:54,357 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 14:36:54,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:36:54,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306819871] [2021-05-02 14:36:54,357 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:36:54,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131320569] [2021-05-02 14:36:54,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131320569] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:36:54,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:36:54,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 14:36:54,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332974771] [2021-05-02 14:36:54,358 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 14:36:54,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:36:54,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 14:36:54,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:36:54,359 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:36:54,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:36:54,407 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2021-05-02 14:36:54,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 14:36:54,408 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-05-02 14:36:54,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:36:54,410 INFO L225 Difference]: With dead ends: 64 [2021-05-02 14:36:54,410 INFO L226 Difference]: Without dead ends: 57 [2021-05-02 14:36:54,410 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 16.2ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:36:54,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-02 14:36:54,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2021-05-02 14:36:54,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 40 states have (on average 1.25) internal successors, (50), 41 states have internal predecessors, (50), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 14:36:54,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2021-05-02 14:36:54,419 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 29 [2021-05-02 14:36:54,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:36:54,419 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2021-05-02 14:36:54,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:36:54,420 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2021-05-02 14:36:54,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 14:36:54,421 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:36:54,421 INFO L523 BasicCegarLoop]: trace histogram [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 14:36:54,625 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 14:36:54,625 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:36:54,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:36:54,625 INFO L82 PathProgramCache]: Analyzing trace with hash -2029937874, now seen corresponding path program 1 times [2021-05-02 14:36:54,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:36:54,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934600267] [2021-05-02 14:36:54,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:36:54,642 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:36:54,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [54184054] [2021-05-02 14:36:54,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:36:54,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:36:54,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 14:36:54,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:36:54,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:54,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:54,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:54,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:54,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:54,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:54,935 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 14:36:54,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:36:54,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934600267] [2021-05-02 14:36:54,935 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:36:54,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54184054] [2021-05-02 14:36:54,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54184054] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:36:54,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:36:54,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:36:54,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546161162] [2021-05-02 14:36:54,936 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:36:54,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:36:54,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:36:54,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:36:54,938 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:36:55,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:36:55,142 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2021-05-02 14:36:55,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:36:55,143 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-05-02 14:36:55,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:36:55,144 INFO L225 Difference]: With dead ends: 69 [2021-05-02 14:36:55,144 INFO L226 Difference]: Without dead ends: 65 [2021-05-02 14:36:55,144 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 163.0ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:36:55,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-02 14:36:55,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 53. [2021-05-02 14:36:55,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 39 states have (on average 1.2307692307692308) internal successors, (48), 40 states have internal predecessors, (48), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 14:36:55,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2021-05-02 14:36:55,151 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 29 [2021-05-02 14:36:55,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:36:55,151 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2021-05-02 14:36:55,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:36:55,152 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2021-05-02 14:36:55,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 14:36:55,152 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:36:55,152 INFO L523 BasicCegarLoop]: trace histogram [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 14:36:55,368 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:36:55,369 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:36:55,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:36:55,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1731935178, now seen corresponding path program 1 times [2021-05-02 14:36:55,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:36:55,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6611656] [2021-05-02 14:36:55,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:36:55,390 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:36:55,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [68883502] [2021-05-02 14:36:55,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:36:55,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:36:55,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-02 14:36:55,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:36:55,506 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 14:36:55,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:36:55,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6611656] [2021-05-02 14:36:55,507 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:36:55,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68883502] [2021-05-02 14:36:55,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68883502] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:36:55,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:36:55,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 14:36:55,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642367969] [2021-05-02 14:36:55,508 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 14:36:55,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:36:55,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 14:36:55,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:36:55,509 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 14:36:55,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:36:55,530 INFO L93 Difference]: Finished difference Result 74 states and 87 transitions. [2021-05-02 14:36:55,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 14:36:55,530 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2021-05-02 14:36:55,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:36:55,531 INFO L225 Difference]: With dead ends: 74 [2021-05-02 14:36:55,531 INFO L226 Difference]: Without dead ends: 42 [2021-05-02 14:36:55,531 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:36:55,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-02 14:36:55,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-05-02 14:36:55,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 31 states have internal predecessors, (37), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 14:36:55,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2021-05-02 14:36:55,536 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 35 [2021-05-02 14:36:55,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:36:55,536 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2021-05-02 14:36:55,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 14:36:55,536 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2021-05-02 14:36:55,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 14:36:55,537 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:36:55,537 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-02 14:36:55,756 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:36:55,757 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:36:55,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:36:55,757 INFO L82 PathProgramCache]: Analyzing trace with hash 815990494, now seen corresponding path program 1 times [2021-05-02 14:36:55,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:36:55,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498632386] [2021-05-02 14:36:55,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:36:55,782 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:36:55,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [878188158] [2021-05-02 14:36:55,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:36:55,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:36:55,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 14:36:55,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:36:55,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:55,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:55,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:55,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:55,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:55,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:55,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:55,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:55,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:55,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:55,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:55,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:55,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:55,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:55,984 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 14:36:55,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:36:55,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498632386] [2021-05-02 14:36:55,985 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:36:55,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878188158] [2021-05-02 14:36:55,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878188158] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:36:55,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:36:55,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 14:36:55,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226338171] [2021-05-02 14:36:55,986 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 14:36:55,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:36:55,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 14:36:55,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:36:55,987 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 14:36:56,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:36:56,039 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2021-05-02 14:36:56,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 14:36:56,040 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2021-05-02 14:36:56,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:36:56,042 INFO L225 Difference]: With dead ends: 67 [2021-05-02 14:36:56,042 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 14:36:56,042 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 25.1ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:36:56,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 14:36:56,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2021-05-02 14:36:56,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 40 states have (on average 1.225) internal successors, (49), 41 states have internal predecessors, (49), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 14:36:56,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2021-05-02 14:36:56,053 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 38 [2021-05-02 14:36:56,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:36:56,053 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2021-05-02 14:36:56,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 14:36:56,054 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2021-05-02 14:36:56,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 14:36:56,058 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:36:56,058 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:36:56,278 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 14:36:56,279 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:36:56,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:36:56,279 INFO L82 PathProgramCache]: Analyzing trace with hash 817777954, now seen corresponding path program 1 times [2021-05-02 14:36:56,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:36:56,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131306704] [2021-05-02 14:36:56,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:36:56,289 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:36:56,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [213365888] [2021-05-02 14:36:56,289 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 14:36:56,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:36:56,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 14:36:56,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:36:56,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:56,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:56,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:56,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:56,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:56,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:56,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:56,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:56,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:56,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:57,642 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 14:36:57,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:36:57,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131306704] [2021-05-02 14:36:57,643 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:36:57,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213365888] [2021-05-02 14:36:57,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213365888] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:36:57,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:36:57,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 14:36:57,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872961890] [2021-05-02 14:36:57,643 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 14:36:57,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:36:57,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 14:36:57,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:36:57,644 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 14:36:58,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:36:58,287 INFO L93 Difference]: Finished difference Result 79 states and 95 transitions. [2021-05-02 14:36:58,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 14:36:58,287 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2021-05-02 14:36:58,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:36:58,288 INFO L225 Difference]: With dead ends: 79 [2021-05-02 14:36:58,288 INFO L226 Difference]: Without dead ends: 76 [2021-05-02 14:36:58,289 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 601.7ms TimeCoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-05-02 14:36:58,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-02 14:36:58,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 63. [2021-05-02 14:36:58,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 48 states have internal predecessors, (55), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 14:36:58,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2021-05-02 14:36:58,295 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 38 [2021-05-02 14:36:58,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:36:58,296 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2021-05-02 14:36:58,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 14:36:58,296 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2021-05-02 14:36:58,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-02 14:36:58,300 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:36:58,301 INFO L523 BasicCegarLoop]: trace histogram [3, 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] [2021-05-02 14:36:58,501 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:36:58,502 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:36:58,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:36:58,502 INFO L82 PathProgramCache]: Analyzing trace with hash 268409689, now seen corresponding path program 1 times [2021-05-02 14:36:58,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:36:58,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224089188] [2021-05-02 14:36:58,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:36:58,511 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:36:58,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1952379557] [2021-05-02 14:36:58,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:36:58,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:36:58,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 14:36:58,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:36:58,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:58,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:58,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:58,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:58,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:58,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:58,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:58,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:58,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:58,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:58,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:58,644 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-02 14:36:58,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:36:58,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224089188] [2021-05-02 14:36:58,644 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:36:58,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952379557] [2021-05-02 14:36:58,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952379557] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:36:58,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:36:58,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 14:36:58,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137539690] [2021-05-02 14:36:58,645 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 14:36:58,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:36:58,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 14:36:58,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:36:58,646 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 14:36:58,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:36:58,687 INFO L93 Difference]: Finished difference Result 99 states and 116 transitions. [2021-05-02 14:36:58,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 14:36:58,688 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 40 [2021-05-02 14:36:58,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:36:58,690 INFO L225 Difference]: With dead ends: 99 [2021-05-02 14:36:58,690 INFO L226 Difference]: Without dead ends: 65 [2021-05-02 14:36:58,690 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 23.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:36:58,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-02 14:36:58,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-05-02 14:36:58,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 48 states have (on average 1.1875) internal successors, (57), 50 states have internal predecessors, (57), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 14:36:58,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2021-05-02 14:36:58,696 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 40 [2021-05-02 14:36:58,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:36:58,696 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2021-05-02 14:36:58,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 14:36:58,696 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2021-05-02 14:36:58,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 14:36:58,697 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:36:58,697 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:36:58,920 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:36:58,920 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:36:58,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:36:58,921 INFO L82 PathProgramCache]: Analyzing trace with hash 829605357, now seen corresponding path program 2 times [2021-05-02 14:36:58,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:36:58,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667133883] [2021-05-02 14:36:58,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:36:58,929 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:36:58,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1829966620] [2021-05-02 14:36:58,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:36:58,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:36:58,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:36:58,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 14:36:58,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:36:58,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:59,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:59,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:59,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:59,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:59,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:59,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:59,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:59,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:59,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:59,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:59,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:59,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:59,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:59,085 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-02 14:36:59,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:36:59,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667133883] [2021-05-02 14:36:59,085 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:36:59,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829966620] [2021-05-02 14:36:59,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829966620] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:36:59,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:36:59,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 14:36:59,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429813947] [2021-05-02 14:36:59,086 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 14:36:59,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:36:59,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 14:36:59,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:36:59,087 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 14:36:59,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:36:59,141 INFO L93 Difference]: Finished difference Result 106 states and 125 transitions. [2021-05-02 14:36:59,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:36:59,142 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 43 [2021-05-02 14:36:59,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:36:59,142 INFO L225 Difference]: With dead ends: 106 [2021-05-02 14:36:59,142 INFO L226 Difference]: Without dead ends: 72 [2021-05-02 14:36:59,143 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 36.2ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:36:59,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-05-02 14:36:59,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 68. [2021-05-02 14:36:59,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 51 states have (on average 1.196078431372549) internal successors, (61), 53 states have internal predecessors, (61), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 14:36:59,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2021-05-02 14:36:59,148 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 43 [2021-05-02 14:36:59,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:36:59,149 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2021-05-02 14:36:59,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 14:36:59,149 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2021-05-02 14:36:59,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 14:36:59,149 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:36:59,149 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 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] [2021-05-02 14:36:59,371 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 14:36:59,371 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:36:59,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:36:59,372 INFO L82 PathProgramCache]: Analyzing trace with hash -897932583, now seen corresponding path program 3 times [2021-05-02 14:36:59,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:36:59,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198992931] [2021-05-02 14:36:59,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:36:59,387 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:36:59,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1565149346] [2021-05-02 14:36:59,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:36:59,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 14:36:59,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:36:59,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-02 14:36:59,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:36:59,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:59,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:59,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:59,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:59,542 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 14:36:59,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:36:59,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198992931] [2021-05-02 14:36:59,543 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:36:59,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565149346] [2021-05-02 14:36:59,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565149346] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:36:59,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:36:59,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 14:36:59,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047675929] [2021-05-02 14:36:59,544 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 14:36:59,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:36:59,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 14:36:59,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 14:36:59,545 INFO L87 Difference]: Start difference. First operand 68 states and 79 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 14:36:59,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:36:59,576 INFO L93 Difference]: Finished difference Result 97 states and 112 transitions. [2021-05-02 14:36:59,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 14:36:59,577 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 46 [2021-05-02 14:36:59,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:36:59,578 INFO L225 Difference]: With dead ends: 97 [2021-05-02 14:36:59,578 INFO L226 Difference]: Without dead ends: 63 [2021-05-02 14:36:59,578 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.0ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:36:59,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-05-02 14:36:59,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 48. [2021-05-02 14:36:59,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 35 states have internal predecessors, (40), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 14:36:59,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2021-05-02 14:36:59,583 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 46 [2021-05-02 14:36:59,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:36:59,583 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2021-05-02 14:36:59,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 14:36:59,583 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2021-05-02 14:36:59,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 14:36:59,584 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:36:59,584 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:36:59,806 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 14:36:59,806 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:36:59,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:36:59,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1469925226, now seen corresponding path program 2 times [2021-05-02 14:36:59,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:36:59,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550497928] [2021-05-02 14:36:59,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:36:59,817 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:36:59,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [791287889] [2021-05-02 14:36:59,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:36:59,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:36:59,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:36:59,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 14:36:59,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:36:59,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:59,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:59,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:59,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:59,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:59,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:59,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:59,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:59,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:59,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:59,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:59,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:59,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:59,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:59,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:59,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:59,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:59,994 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 14:36:59,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:36:59,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550497928] [2021-05-02 14:36:59,995 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:36:59,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791287889] [2021-05-02 14:36:59,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791287889] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:36:59,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:36:59,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 14:36:59,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624516079] [2021-05-02 14:36:59,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:36:59,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:36:59,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:36:59,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:36:59,996 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 14:37:00,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:37:00,060 INFO L93 Difference]: Finished difference Result 98 states and 110 transitions. [2021-05-02 14:37:00,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:37:00,060 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 47 [2021-05-02 14:37:00,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:37:00,062 INFO L225 Difference]: With dead ends: 98 [2021-05-02 14:37:00,062 INFO L226 Difference]: Without dead ends: 91 [2021-05-02 14:37:00,063 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 38.6ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:37:00,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-05-02 14:37:00,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 71. [2021-05-02 14:37:00,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 53 states have (on average 1.169811320754717) internal successors, (62), 54 states have internal predecessors, (62), 10 states have call successors, (10), 8 states have call predecessors, (10), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 14:37:00,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 80 transitions. [2021-05-02 14:37:00,070 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 80 transitions. Word has length 47 [2021-05-02 14:37:00,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:37:00,071 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 80 transitions. [2021-05-02 14:37:00,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 14:37:00,071 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 80 transitions. [2021-05-02 14:37:00,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 14:37:00,071 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:37:00,072 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:37:00,293 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 14:37:00,294 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:37:00,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:37:00,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1471712686, now seen corresponding path program 2 times [2021-05-02 14:37:00,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:37:00,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086224820] [2021-05-02 14:37:00,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:37:00,307 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:37:00,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1517322433] [2021-05-02 14:37:00,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:37:00,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:37:00,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:37:00,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 14:37:00,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:37:00,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:37:00,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:37:00,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:37:00,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:37:00,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:37:00,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:37:01,022 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 23 [2021-05-02 14:37:01,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:37:01,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:37:01,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:37:01,540 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-02 14:37:01,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:37:01,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086224820] [2021-05-02 14:37:01,541 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:37:01,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517322433] [2021-05-02 14:37:01,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517322433] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:37:01,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:37:01,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:37:01,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585918811] [2021-05-02 14:37:01,542 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:37:01,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:37:01,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:37:01,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:37:01,544 INFO L87 Difference]: Start difference. First operand 71 states and 80 transitions. Second operand has 11 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 14:37:01,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:37:01,863 INFO L93 Difference]: Finished difference Result 100 states and 113 transitions. [2021-05-02 14:37:01,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:37:01,864 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 47 [2021-05-02 14:37:01,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:37:01,865 INFO L225 Difference]: With dead ends: 100 [2021-05-02 14:37:01,865 INFO L226 Difference]: Without dead ends: 51 [2021-05-02 14:37:01,865 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 369.5ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:37:01,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-02 14:37:01,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-05-02 14:37:01,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 37 states have (on average 1.162162162162162) internal successors, (43), 38 states have internal predecessors, (43), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 14:37:01,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2021-05-02 14:37:01,869 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 47 [2021-05-02 14:37:01,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:37:01,869 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2021-05-02 14:37:01,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 14:37:01,869 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2021-05-02 14:37:01,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 14:37:01,869 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:37:01,869 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-05-02 14:37:02,070 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:37:02,070 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:37:02,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:37:02,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1045745238, now seen corresponding path program 3 times [2021-05-02 14:37:02,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:37:02,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356366639] [2021-05-02 14:37:02,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:37:02,084 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:37:02,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1405190582] [2021-05-02 14:37:02,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:37:02,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 14:37:02,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:37:02,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 14:37:02,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:37:02,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:37:02,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:37:02,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:37:02,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:37:02,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:37:02,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:37:02,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:37:02,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:37:02,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:37:02,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:37:02,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:37:02,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:37:02,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:37:02,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:37:02,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:37:02,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:37:02,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:37:02,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:37:02,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:37:02,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:37:02,378 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 14:37:02,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:37:02,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356366639] [2021-05-02 14:37:02,379 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:37:02,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405190582] [2021-05-02 14:37:02,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405190582] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:37:02,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:37:02,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 14:37:02,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047965073] [2021-05-02 14:37:02,380 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:37:02,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:37:02,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:37:02,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:37:02,381 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 14:37:02,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:37:02,443 INFO L93 Difference]: Finished difference Result 101 states and 113 transitions. [2021-05-02 14:37:02,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:37:02,443 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 50 [2021-05-02 14:37:02,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:37:02,445 INFO L225 Difference]: With dead ends: 101 [2021-05-02 14:37:02,446 INFO L226 Difference]: Without dead ends: 94 [2021-05-02 14:37:02,446 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 43.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:37:02,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-02 14:37:02,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 74. [2021-05-02 14:37:02,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 56 states have (on average 1.1607142857142858) internal successors, (65), 57 states have internal predecessors, (65), 10 states have call successors, (10), 8 states have call predecessors, (10), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 14:37:02,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2021-05-02 14:37:02,452 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 50 [2021-05-02 14:37:02,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:37:02,452 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2021-05-02 14:37:02,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 14:37:02,453 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2021-05-02 14:37:02,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 14:37:02,453 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:37:02,453 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:37:02,664 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 14:37:02,664 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:37:02,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:37:02,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1047532698, now seen corresponding path program 3 times [2021-05-02 14:37:02,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:37:02,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352920293] [2021-05-02 14:37:02,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:37:02,685 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:37:02,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [152759139] [2021-05-02 14:37:02,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true