/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 15:31:44,368 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 15:31:44,369 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 15:31:44,389 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 15:31:44,396 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 15:31:44,397 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 15:31:44,398 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 15:31:44,399 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 15:31:44,399 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 15:31:44,400 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 15:31:44,401 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 15:31:44,402 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 15:31:44,403 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 15:31:44,404 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 15:31:44,405 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 15:31:44,405 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 15:31:44,407 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 15:31:44,412 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 15:31:44,412 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 15:31:44,413 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 15:31:44,421 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 15:31:44,453 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 15:31:44,453 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 15:31:44,454 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 15:31:44,454 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 15:31:44,454 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 15:31:44,454 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 15:31:44,454 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 15:31:44,454 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 15:31:44,454 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 15:31:44,454 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 15:31:44,455 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 15:31:44,455 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 15:31:44,455 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 15:31:44,455 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 15:31:44,455 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 15:31:44,455 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 15:31:44,455 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 15:31:44,455 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 15:31:44,455 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 15:31:44,455 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 15:31:44,456 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:31:44,456 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 15:31:44,456 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 15:31:44,456 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 15:31:44,456 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 15:31:44,456 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 15:31:44,456 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 15:31:44,456 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 15:31:44,456 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 15:31:44,685 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 15:31:44,711 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 15:31:44,713 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 15:31:44,714 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 15:31:44,714 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 15:31:44,715 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound10.c [2021-05-02 15:31:44,771 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5f3a1e06/7ec68919f33843aeb29bbf22513b6b65/FLAG9a4509bad [2021-05-02 15:31:45,133 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 15:31:45,133 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound10.c [2021-05-02 15:31:45,138 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5f3a1e06/7ec68919f33843aeb29bbf22513b6b65/FLAG9a4509bad [2021-05-02 15:31:45,148 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5f3a1e06/7ec68919f33843aeb29bbf22513b6b65 [2021-05-02 15:31:45,150 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 15:31:45,151 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 15:31:45,154 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 15:31:45,154 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 15:31:45,157 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 15:31:45,157 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:31:45" (1/1) ... [2021-05-02 15:31:45,158 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25fc5f97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:31:45, skipping insertion in model container [2021-05-02 15:31:45,158 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:31:45" (1/1) ... [2021-05-02 15:31:45,162 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 15:31:45,177 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 15:31:45,276 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound10.c[545,558] [2021-05-02 15:31:45,286 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:31:45,292 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 15:31:45,300 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound10.c[545,558] [2021-05-02 15:31:45,305 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:31:45,313 INFO L208 MainTranslator]: Completed translation [2021-05-02 15:31:45,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:31:45 WrapperNode [2021-05-02 15:31:45,314 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 15:31:45,315 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 15:31:45,315 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 15:31:45,315 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 15:31:45,322 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:31:45" (1/1) ... [2021-05-02 15:31:45,322 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:31:45" (1/1) ... [2021-05-02 15:31:45,326 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:31:45" (1/1) ... [2021-05-02 15:31:45,327 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:31:45" (1/1) ... [2021-05-02 15:31:45,358 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:31:45" (1/1) ... [2021-05-02 15:31:45,361 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:31:45" (1/1) ... [2021-05-02 15:31:45,365 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:31:45" (1/1) ... [2021-05-02 15:31:45,367 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 15:31:45,367 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 15:31:45,367 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 15:31:45,367 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 15:31:45,368 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:31:45" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:31:45,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 15:31:45,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 15:31:45,418 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 15:31:45,418 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 15:31:45,418 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 15:31:45,418 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 15:31:45,418 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 15:31:45,419 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 15:31:45,420 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 15:31:45,420 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 15:31:45,420 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 15:31:45,420 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 15:31:45,421 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 15:31:45,421 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 15:31:45,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 15:31:45,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 15:31:45,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 15:31:45,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 15:31:45,423 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 15:31:45,423 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 15:31:45,629 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 15:31:45,629 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 15:31:45,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:31:45 BoogieIcfgContainer [2021-05-02 15:31:45,630 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 15:31:45,631 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 15:31:45,631 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 15:31:45,633 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 15:31:45,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 03:31:45" (1/3) ... [2021-05-02 15:31:45,633 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75d0e461 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:31:45, skipping insertion in model container [2021-05-02 15:31:45,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:31:45" (2/3) ... [2021-05-02 15:31:45,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75d0e461 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:31:45, skipping insertion in model container [2021-05-02 15:31:45,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:31:45" (3/3) ... [2021-05-02 15:31:45,635 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_valuebound10.c [2021-05-02 15:31:45,639 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 15:31:45,658 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 15:31:45,668 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 15:31:45,683 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 15:31:45,683 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 15:31:45,683 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 15:31:45,683 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 15:31:45,683 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 15:31:45,683 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 15:31:45,683 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 15:31:45,683 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 15:31:45,694 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 15:31:45,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 15:31:45,697 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:31:45,698 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:31:45,698 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:31:45,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:31:45,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1784424332, now seen corresponding path program 1 times [2021-05-02 15:31:45,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:31:45,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731239720] [2021-05-02 15:31:45,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:31:45,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:31:45,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:31:45,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:31:45,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:31:45,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:31:45,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 15:31:45,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:31:45,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 15:31:45,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:31:45,879 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 15:31:45,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:31:45,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731239720] [2021-05-02 15:31:45,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731239720] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:31:45,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:31:45,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 15:31:45,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235043719] [2021-05-02 15:31:45,884 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 15:31:45,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:31:45,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 15:31:45,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:31:45,894 INFO L87 Difference]: Start difference. First operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) 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, (6), 3 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 15:31:46,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:31:46,015 INFO L93 Difference]: Finished difference Result 69 states and 110 transitions. [2021-05-02 15:31:46,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 15:31:46,017 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, (6), 3 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 28 [2021-05-02 15:31:46,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:31:46,023 INFO L225 Difference]: With dead ends: 69 [2021-05-02 15:31:46,024 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 15:31:46,027 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:31:46,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 15:31:46,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-02 15:31:46,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 15:31:46,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-05-02 15:31:46,072 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2021-05-02 15:31:46,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:31:46,072 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-05-02 15:31:46,072 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, (6), 3 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 15:31:46,072 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-05-02 15:31:46,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 15:31:46,074 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:31:46,074 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:31:46,074 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 15:31:46,074 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:31:46,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:31:46,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1361835634, now seen corresponding path program 1 times [2021-05-02 15:31:46,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:31:46,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769511830] [2021-05-02 15:31:46,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:31:46,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:31:46,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:31:46,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:31:46,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:31:46,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:31:46,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 15:31:46,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:31:46,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 15:31:46,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:31:46,248 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 15:31:46,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:31:46,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769511830] [2021-05-02 15:31:46,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769511830] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:31:46,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:31:46,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 15:31:46,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652473521] [2021-05-02 15:31:46,250 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:31:46,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:31:46,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:31:46,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:31:46,251 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-02 15:31:46,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:31:46,504 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2021-05-02 15:31:46,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:31:46,504 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2021-05-02 15:31:46,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:31:46,507 INFO L225 Difference]: With dead ends: 46 [2021-05-02 15:31:46,507 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 15:31:46,507 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 106.4ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:31:46,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 15:31:46,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-05-02 15:31:46,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 15:31:46,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-02 15:31:46,550 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2021-05-02 15:31:46,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:31:46,551 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-02 15:31:46,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-02 15:31:46,551 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-02 15:31:46,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 15:31:46,552 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:31:46,552 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:31:46,552 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 15:31:46,552 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:31:46,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:31:46,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1382067636, now seen corresponding path program 1 times [2021-05-02 15:31:46,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:31:46,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409650383] [2021-05-02 15:31:46,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:31:46,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:31:46,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:31:46,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:31:46,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:31:46,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:31:46,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 15:31:46,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:31:46,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 15:31:46,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:31:46,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-02 15:31:46,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:31:46,756 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 15:31:46,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:31:46,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409650383] [2021-05-02 15:31:46,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409650383] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:31:46,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:31:46,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 15:31:46,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739198333] [2021-05-02 15:31:46,757 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:31:46,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:31:46,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:31:46,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:31:46,758 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:31:46,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:31:46,984 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2021-05-02 15:31:46,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:31:46,984 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 15:31:46,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:31:46,985 INFO L225 Difference]: With dead ends: 50 [2021-05-02 15:31:46,985 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 15:31:46,986 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 131.6ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:31:46,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 15:31:46,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2021-05-02 15:31:46,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 15:31:46,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-05-02 15:31:46,992 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2021-05-02 15:31:46,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:31:46,992 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-05-02 15:31:46,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:31:46,992 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-05-02 15:31:46,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 15:31:46,993 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:31:46,993 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:31:46,993 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 15:31:46,993 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:31:46,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:31:46,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1455208590, now seen corresponding path program 1 times [2021-05-02 15:31:46,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:31:46,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611718481] [2021-05-02 15:31:46,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:31:47,001 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:31:47,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1530672812] [2021-05-02 15:31:47,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:31:47,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:31:47,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 15:31:47,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:31:47,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:47,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:47,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:47,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:47,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:47,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:47,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:47,261 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-05-02 15:31:47,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:31:47,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611718481] [2021-05-02 15:31:47,262 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:31:47,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530672812] [2021-05-02 15:31:47,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530672812] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:31:47,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:31:47,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 15:31:47,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022494200] [2021-05-02 15:31:47,262 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:31:47,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:31:47,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:31:47,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:31:47,263 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 15:31:47,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:31:47,425 INFO L93 Difference]: Finished difference Result 69 states and 89 transitions. [2021-05-02 15:31:47,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:31:47,426 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2021-05-02 15:31:47,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:31:47,427 INFO L225 Difference]: With dead ends: 69 [2021-05-02 15:31:47,427 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 15:31:47,427 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 40.6ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:31:47,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 15:31:47,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-05-02 15:31:47,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 15:31:47,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2021-05-02 15:31:47,436 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 38 [2021-05-02 15:31:47,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:31:47,436 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2021-05-02 15:31:47,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 15:31:47,436 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2021-05-02 15:31:47,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 15:31:47,437 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:31:47,437 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:31:47,653 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:31:47,653 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:31:47,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:31:47,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1688067263, now seen corresponding path program 1 times [2021-05-02 15:31:47,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:31:47,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529740889] [2021-05-02 15:31:47,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:31:47,661 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:31:47,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [554465229] [2021-05-02 15:31:47,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:31:47,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:31:47,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 15:31:47,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:31:47,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:47,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:47,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:47,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:47,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:47,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:47,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:47,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:47,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:47,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:47,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:47,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:47,920 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-05-02 15:31:47,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:31:47,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529740889] [2021-05-02 15:31:47,921 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:31:47,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554465229] [2021-05-02 15:31:47,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554465229] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:31:47,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:31:47,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 15:31:47,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364977910] [2021-05-02 15:31:47,922 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:31:47,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:31:47,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:31:47,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:31:47,926 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 15:31:48,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:31:48,041 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2021-05-02 15:31:48,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:31:48,042 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2021-05-02 15:31:48,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:31:48,045 INFO L225 Difference]: With dead ends: 68 [2021-05-02 15:31:48,046 INFO L226 Difference]: Without dead ends: 61 [2021-05-02 15:31:48,046 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 38.0ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:31:48,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-02 15:31:48,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2021-05-02 15:31:48,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 36 states have internal predecessors, (40), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 15:31:48,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 74 transitions. [2021-05-02 15:31:48,065 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 74 transitions. Word has length 45 [2021-05-02 15:31:48,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:31:48,066 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 74 transitions. [2021-05-02 15:31:48,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 15:31:48,067 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 74 transitions. [2021-05-02 15:31:48,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 15:31:48,070 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:31:48,071 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:31:48,286 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:31:48,286 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:31:48,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:31:48,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1471734606, now seen corresponding path program 1 times [2021-05-02 15:31:48,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:31:48,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895904639] [2021-05-02 15:31:48,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:31:48,293 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:31:48,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [51395997] [2021-05-02 15:31:48,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:31:48,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:31:48,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 15:31:48,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:31:48,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:48,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:48,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:48,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:48,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:48,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:48,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:48,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:48,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:48,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:48,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:48,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:48,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:48,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:48,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:48,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:48,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:48,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:48,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:48,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:48,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:48,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:48,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:48,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:48,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:48,701 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-02 15:31:48,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:31:48,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895904639] [2021-05-02 15:31:48,701 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:31:48,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51395997] [2021-05-02 15:31:48,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51395997] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:31:48,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:31:48,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 15:31:48,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596381372] [2021-05-02 15:31:48,702 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 15:31:48,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:31:48,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 15:31:48,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:31:48,702 INFO L87 Difference]: Start difference. First operand 60 states and 74 transitions. Second operand has 11 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 15:31:48,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:31:48,960 INFO L93 Difference]: Finished difference Result 85 states and 105 transitions. [2021-05-02 15:31:48,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 15:31:48,960 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 55 [2021-05-02 15:31:48,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:31:48,962 INFO L225 Difference]: With dead ends: 85 [2021-05-02 15:31:48,962 INFO L226 Difference]: Without dead ends: 73 [2021-05-02 15:31:48,962 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 111.9ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-02 15:31:48,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-02 15:31:48,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-05-02 15:31:48,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 41 states have (on average 1.170731707317073) internal successors, (48), 43 states have internal predecessors, (48), 23 states have call successors, (23), 9 states have call predecessors, (23), 8 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 15:31:48,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 92 transitions. [2021-05-02 15:31:48,971 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 92 transitions. Word has length 55 [2021-05-02 15:31:48,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:31:48,971 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 92 transitions. [2021-05-02 15:31:48,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 15:31:48,971 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 92 transitions. [2021-05-02 15:31:48,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-02 15:31:48,972 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:31:48,972 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:31:49,175 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:31:49,177 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:31:49,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:31:49,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1254068366, now seen corresponding path program 2 times [2021-05-02 15:31:49,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:31:49,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389731423] [2021-05-02 15:31:49,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:31:49,183 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:31:49,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1470204755] [2021-05-02 15:31:49,184 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:31:49,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:31:49,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:31:49,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-02 15:31:49,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:31:49,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:49,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:49,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:49,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:49,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:49,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:49,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:49,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:49,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:49,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:49,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:49,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:49,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:49,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:49,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:49,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:49,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:49,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:49,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:49,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:49,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:49,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:49,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:49,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:49,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:50,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:50,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:51,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:51,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:10,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:10,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:17,797 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-05-02 15:32:17,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:32:17,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389731423] [2021-05-02 15:32:17,797 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:32:17,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470204755] [2021-05-02 15:32:17,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470204755] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:32:17,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:32:17,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 15:32:17,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661803817] [2021-05-02 15:32:17,798 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 15:32:17,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:32:17,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 15:32:17,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-05-02 15:32:17,799 INFO L87 Difference]: Start difference. First operand 73 states and 92 transitions. Second operand has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 11 states have internal predecessors, (22), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) [2021-05-02 15:32:19,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:32:19,796 INFO L93 Difference]: Finished difference Result 98 states and 123 transitions. [2021-05-02 15:32:19,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 15:32:19,797 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 11 states have internal predecessors, (22), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) Word has length 72 [2021-05-02 15:32:19,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:32:19,798 INFO L225 Difference]: With dead ends: 98 [2021-05-02 15:32:19,798 INFO L226 Difference]: Without dead ends: 86 [2021-05-02 15:32:19,798 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 361.6ms TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-05-02 15:32:19,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-02 15:32:19,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2021-05-02 15:32:19,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 50 states have internal predecessors, (55), 28 states have call successors, (28), 10 states have call predecessors, (28), 9 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-02 15:32:19,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 109 transitions. [2021-05-02 15:32:19,811 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 109 transitions. Word has length 72 [2021-05-02 15:32:19,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:32:19,811 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 109 transitions. [2021-05-02 15:32:19,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 11 states have internal predecessors, (22), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) [2021-05-02 15:32:19,811 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 109 transitions. [2021-05-02 15:32:19,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 15:32:19,812 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:32:19,812 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:32:20,017 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:32:20,018 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:32:20,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:32:20,018 INFO L82 PathProgramCache]: Analyzing trace with hash 680531353, now seen corresponding path program 1 times [2021-05-02 15:32:20,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:32:20,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382239892] [2021-05-02 15:32:20,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:32:20,024 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:32:20,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1372892398] [2021-05-02 15:32:20,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:32:20,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:32:20,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-02 15:32:20,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:32:20,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:20,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:20,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:20,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:20,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:20,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:20,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:20,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:20,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:20,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:20,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:20,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:20,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:20,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:20,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:20,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:20,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:20,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:20,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:20,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:20,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:20,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:20,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:20,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:20,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:20,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:20,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:20,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:20,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:20,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:20,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:20,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:20,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:20,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:20,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:20,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:20,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:20,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:20,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:20,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:20,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:20,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:20,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:20,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:20,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:20,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:20,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:20,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:20,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:20,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:20,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:20,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:40,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:40,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:40,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:40,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:40,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:40,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:40,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:40,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:40,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:40,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:40,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:40,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:40,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:40,907 WARN L159 QuantifierPusher]: Ignoring assumption.