/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/egcd3-ll_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 15:00:47,422 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 15:00:47,424 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 15:00:47,447 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 15:00:47,454 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 15:00:47,455 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 15:00:47,456 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 15:00:47,457 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 15:00:47,457 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 15:00:47,458 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 15:00:47,459 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 15:00:47,460 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 15:00:47,461 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 15:00:47,469 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 15:00:47,471 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 15:00:47,473 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 15:00:47,479 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 15:00:47,483 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 15:00:47,484 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 15:00:47,490 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 15:00:47,491 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 15:00:47,511 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 15:00:47,512 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 15:00:47,512 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 15:00:47,512 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 15:00:47,513 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 15:00:47,513 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 15:00:47,513 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 15:00:47,513 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 15:00:47,513 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 15:00:47,513 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 15:00:47,513 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 15:00:47,513 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 15:00:47,513 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 15:00:47,513 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 15:00:47,514 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 15:00:47,514 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 15:00:47,514 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 15:00:47,514 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 15:00:47,514 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 15:00:47,514 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 15:00:47,514 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:00:47,514 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 15:00:47,514 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 15:00:47,515 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 15:00:47,515 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 15:00:47,515 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 15:00:47,515 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 15:00:47,515 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 15:00:47,515 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 15:00:47,725 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 15:00:47,744 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 15:00:47,746 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 15:00:47,747 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 15:00:47,747 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 15:00:47,748 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound20.c [2021-05-02 15:00:47,798 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84ad2b50a/790f947999a24890bf72b5c1dad1190c/FLAG9dfbd4e00 [2021-05-02 15:00:48,161 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 15:00:48,162 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound20.c [2021-05-02 15:00:48,168 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84ad2b50a/790f947999a24890bf72b5c1dad1190c/FLAG9dfbd4e00 [2021-05-02 15:00:48,187 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84ad2b50a/790f947999a24890bf72b5c1dad1190c [2021-05-02 15:00:48,190 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 15:00:48,191 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 15:00:48,194 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 15:00:48,194 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 15:00:48,197 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 15:00:48,198 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:00:48" (1/1) ... [2021-05-02 15:00:48,199 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@afe3af1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:00:48, skipping insertion in model container [2021-05-02 15:00:48,199 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:00:48" (1/1) ... [2021-05-02 15:00:48,204 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 15:00:48,220 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 15:00:48,342 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/egcd3-ll_valuebound20.c[490,503] [2021-05-02 15:00:48,372 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:00:48,379 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 15:00:48,420 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/egcd3-ll_valuebound20.c[490,503] [2021-05-02 15:00:48,430 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:00:48,442 INFO L208 MainTranslator]: Completed translation [2021-05-02 15:00:48,442 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:00:48 WrapperNode [2021-05-02 15:00:48,442 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 15:00:48,444 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 15:00:48,444 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 15:00:48,445 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 15:00:48,452 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:00:48" (1/1) ... [2021-05-02 15:00:48,452 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:00:48" (1/1) ... [2021-05-02 15:00:48,463 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:00:48" (1/1) ... [2021-05-02 15:00:48,463 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:00:48" (1/1) ... [2021-05-02 15:00:48,474 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:00:48" (1/1) ... [2021-05-02 15:00:48,477 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:00:48" (1/1) ... [2021-05-02 15:00:48,478 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:00:48" (1/1) ... [2021-05-02 15:00:48,479 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 15:00:48,480 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 15:00:48,480 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 15:00:48,480 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 15:00:48,480 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:00:48" (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 15:00:48,546 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 15:00:48,546 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 15:00:48,546 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 15:00:48,546 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 15:00:48,546 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 15:00:48,546 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 15:00:48,546 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 15:00:48,547 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 15:00:48,547 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 15:00:48,547 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 15:00:48,547 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 15:00:48,547 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 15:00:48,548 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 15:00:48,548 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 15:00:48,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 15:00:48,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 15:00:48,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 15:00:48,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 15:00:48,548 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 15:00:48,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 15:00:48,800 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 15:00:48,800 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-02 15:00:48,801 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:00:48 BoogieIcfgContainer [2021-05-02 15:00:48,801 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 15:00:48,802 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 15:00:48,802 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 15:00:48,804 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 15:00:48,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 03:00:48" (1/3) ... [2021-05-02 15:00:48,805 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dd14886 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:00:48, skipping insertion in model container [2021-05-02 15:00:48,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:00:48" (2/3) ... [2021-05-02 15:00:48,805 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dd14886 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:00:48, skipping insertion in model container [2021-05-02 15:00:48,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:00:48" (3/3) ... [2021-05-02 15:00:48,806 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound20.c [2021-05-02 15:00:48,809 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 15:00:48,811 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 15:00:48,821 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 15:00:48,833 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 15:00:48,833 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 15:00:48,833 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 15:00:48,833 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 15:00:48,833 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 15:00:48,833 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 15:00:48,833 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 15:00:48,833 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 15:00:48,842 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 15:00:48,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 15:00:48,845 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:48,846 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:48,846 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:48,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:48,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1237885594, now seen corresponding path program 1 times [2021-05-02 15:00:48,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:48,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31584005] [2021-05-02 15:00:48,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:48,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:48,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:00:49,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:49,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:00:49,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:49,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 15:00:49,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:49,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 15:00:49,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:49,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 15:00:49,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:49,036 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 15:00:49,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:49,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31584005] [2021-05-02 15:00:49,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31584005] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:00:49,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:00:49,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 15:00:49,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099959414] [2021-05-02 15:00:49,041 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 15:00:49,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:49,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 15:00:49,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:00:49,049 INFO L87 Difference]: Start difference. First operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:00:49,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:49,193 INFO L93 Difference]: Finished difference Result 73 states and 115 transitions. [2021-05-02 15:00:49,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 15:00:49,195 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 15:00:49,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:49,199 INFO L225 Difference]: With dead ends: 73 [2021-05-02 15:00:49,200 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 15:00:49,202 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:00:49,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 15:00:49,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 15:00:49,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 15:00:49,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2021-05-02 15:00:49,245 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 33 [2021-05-02 15:00:49,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:49,245 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2021-05-02 15:00:49,246 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:00:49,246 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2021-05-02 15:00:49,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 15:00:49,247 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:49,247 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 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 15:00:49,247 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 15:00:49,248 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:49,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:49,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1569470122, now seen corresponding path program 1 times [2021-05-02 15:00:49,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:49,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784583435] [2021-05-02 15:00:49,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:49,277 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:49,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [693739876] [2021-05-02 15:00:49,277 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 15:00:49,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:49,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 15:00:49,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:49,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:49,445 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 15:00:49,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:49,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784583435] [2021-05-02 15:00:49,445 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:49,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693739876] [2021-05-02 15:00:49,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693739876] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:00:49,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:00:49,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 15:00:49,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447768398] [2021-05-02 15:00:49,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:00:49,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:49,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:00:49,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:00:49,447 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 15:00:49,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:49,514 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2021-05-02 15:00:49,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 15:00:49,514 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2021-05-02 15:00:49,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:49,516 INFO L225 Difference]: With dead ends: 54 [2021-05-02 15:00:49,516 INFO L226 Difference]: Without dead ends: 47 [2021-05-02 15:00:49,516 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 22.8ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:00:49,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-02 15:00:49,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2021-05-02 15:00:49,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 15:00:49,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-02 15:00:49,525 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 34 [2021-05-02 15:00:49,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:49,525 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-02 15:00:49,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 15:00:49,526 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-02 15:00:49,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-02 15:00:49,527 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:49,527 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 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 15:00:49,740 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 15:00:49,741 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:49,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:49,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1443363578, now seen corresponding path program 1 times [2021-05-02 15:00:49,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:49,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595802072] [2021-05-02 15:00:49,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:49,765 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:49,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [298853979] [2021-05-02 15:00:49,765 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 15:00:49,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:49,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 15:00:49,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:49,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:49,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:49,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:49,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:49,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:49,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:49,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:49,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:49,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:49,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:49,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:49,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:49,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:49,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:49,997 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 15:00:49,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:49,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595802072] [2021-05-02 15:00:49,997 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:49,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298853979] [2021-05-02 15:00:49,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298853979] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:49,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:49,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 15:00:49,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811987494] [2021-05-02 15:00:49,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 15:00:49,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:49,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 15:00:49,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:00:49,999 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 15:00:50,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:50,086 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2021-05-02 15:00:50,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 15:00:50,087 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 37 [2021-05-02 15:00:50,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:50,087 INFO L225 Difference]: With dead ends: 53 [2021-05-02 15:00:50,087 INFO L226 Difference]: Without dead ends: 51 [2021-05-02 15:00:50,088 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 65.6ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:00:50,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-02 15:00:50,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2021-05-02 15:00:50,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.2) internal successors, (36), 31 states have internal predecessors, (36), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 15:00:50,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2021-05-02 15:00:50,094 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 37 [2021-05-02 15:00:50,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:50,095 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2021-05-02 15:00:50,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 15:00:50,095 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2021-05-02 15:00:50,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 15:00:50,095 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:50,095 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:50,311 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:50,311 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:50,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:50,312 INFO L82 PathProgramCache]: Analyzing trace with hash 584996456, now seen corresponding path program 1 times [2021-05-02 15:00:50,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:50,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064000402] [2021-05-02 15:00:50,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:50,332 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:50,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [344800007] [2021-05-02 15:00:50,333 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 15:00:50,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:50,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 15:00:50,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:50,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:50,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:50,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:50,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:50,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:50,463 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 15:00:50,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:50,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064000402] [2021-05-02 15:00:50,463 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:50,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344800007] [2021-05-02 15:00:50,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344800007] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:50,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:50,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 15:00:50,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577491169] [2021-05-02 15:00:50,464 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:00:50,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:50,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:00:50,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:00:50,464 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:00:50,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:50,653 INFO L93 Difference]: Finished difference Result 103 states and 143 transitions. [2021-05-02 15:00:50,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 15:00:50,653 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2021-05-02 15:00:50,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:50,654 INFO L225 Difference]: With dead ends: 103 [2021-05-02 15:00:50,654 INFO L226 Difference]: Without dead ends: 96 [2021-05-02 15:00:50,654 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 68.6ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-02 15:00:50,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-02 15:00:50,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2021-05-02 15:00:50,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 48 states have internal predecessors, (59), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 15:00:50,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 95 transitions. [2021-05-02 15:00:50,665 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 95 transitions. Word has length 39 [2021-05-02 15:00:50,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:50,666 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 95 transitions. [2021-05-02 15:00:50,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:00:50,666 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 95 transitions. [2021-05-02 15:00:50,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 15:00:50,667 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:50,667 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:50,867 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:50,867 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:50,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:50,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1286298951, now seen corresponding path program 1 times [2021-05-02 15:00:50,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:50,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501973465] [2021-05-02 15:00:50,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:50,876 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:50,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1272257630] [2021-05-02 15:00:50,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:50,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:50,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 15:00:50,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:50,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:50,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:50,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:50,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:50,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:50,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:51,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:51,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:51,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:51,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:51,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:51,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:51,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:51,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:51,092 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 15:00:51,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:51,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501973465] [2021-05-02 15:00:51,092 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:51,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272257630] [2021-05-02 15:00:51,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272257630] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:51,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:51,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 15:00:51,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981926971] [2021-05-02 15:00:51,093 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 15:00:51,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:51,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 15:00:51,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:00:51,093 INFO L87 Difference]: Start difference. First operand 71 states and 95 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 15:00:51,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:51,181 INFO L93 Difference]: Finished difference Result 79 states and 102 transitions. [2021-05-02 15:00:51,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 15:00:51,182 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2021-05-02 15:00:51,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:51,183 INFO L225 Difference]: With dead ends: 79 [2021-05-02 15:00:51,183 INFO L226 Difference]: Without dead ends: 77 [2021-05-02 15:00:51,183 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 48.1ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:00:51,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-02 15:00:51,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2021-05-02 15:00:51,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.24) internal successors, (62), 51 states have internal predecessors, (62), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 15:00:51,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 98 transitions. [2021-05-02 15:00:51,192 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 98 transitions. Word has length 42 [2021-05-02 15:00:51,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:51,192 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 98 transitions. [2021-05-02 15:00:51,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 15:00:51,193 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 98 transitions. [2021-05-02 15:00:51,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 15:00:51,194 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:51,194 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 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 15:00:51,400 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:51,401 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:51,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:51,402 INFO L82 PathProgramCache]: Analyzing trace with hash -974923140, now seen corresponding path program 1 times [2021-05-02 15:00:51,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:51,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742458364] [2021-05-02 15:00:51,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:51,409 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:51,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [143611595] [2021-05-02 15:00:51,410 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 15:00:51,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:51,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 15:00:51,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:51,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:51,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:51,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:51,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:51,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:51,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:51,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:51,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:51,625 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 15:00:51,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:51,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742458364] [2021-05-02 15:00:51,625 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:51,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143611595] [2021-05-02 15:00:51,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143611595] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:51,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:51,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 15:00:51,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116754794] [2021-05-02 15:00:51,626 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 15:00:51,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:51,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 15:00:51,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:00:51,626 INFO L87 Difference]: Start difference. First operand 75 states and 98 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 15:00:51,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:51,770 INFO L93 Difference]: Finished difference Result 111 states and 147 transitions. [2021-05-02 15:00:51,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 15:00:51,771 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 42 [2021-05-02 15:00:51,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:51,772 INFO L225 Difference]: With dead ends: 111 [2021-05-02 15:00:51,772 INFO L226 Difference]: Without dead ends: 109 [2021-05-02 15:00:51,772 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 60.5ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:00:51,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-02 15:00:51,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 105. [2021-05-02 15:00:51,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 71 states have (on average 1.2535211267605635) internal successors, (89), 72 states have internal predecessors, (89), 27 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 15:00:51,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 141 transitions. [2021-05-02 15:00:51,784 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 141 transitions. Word has length 42 [2021-05-02 15:00:51,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:51,784 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 141 transitions. [2021-05-02 15:00:51,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 15:00:51,784 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 141 transitions. [2021-05-02 15:00:51,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 15:00:51,785 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:51,785 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:52,001 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 15:00:52,001 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:52,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:52,001 INFO L82 PathProgramCache]: Analyzing trace with hash 81990170, now seen corresponding path program 1 times [2021-05-02 15:00:52,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:52,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838633934] [2021-05-02 15:00:52,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:52,011 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:52,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [177096950] [2021-05-02 15:00:52,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:52,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:52,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 15:00:52,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:52,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:52,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:52,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:52,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:52,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:52,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:52,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:52,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:52,190 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 15:00:52,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:52,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838633934] [2021-05-02 15:00:52,190 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:52,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177096950] [2021-05-02 15:00:52,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177096950] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:52,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:52,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 15:00:52,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888952646] [2021-05-02 15:00:52,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 15:00:52,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:52,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 15:00:52,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:00:52,192 INFO L87 Difference]: Start difference. First operand 105 states and 141 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 15:00:52,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:52,376 INFO L93 Difference]: Finished difference Result 118 states and 158 transitions. [2021-05-02 15:00:52,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 15:00:52,376 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2021-05-02 15:00:52,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:52,377 INFO L225 Difference]: With dead ends: 118 [2021-05-02 15:00:52,377 INFO L226 Difference]: Without dead ends: 116 [2021-05-02 15:00:52,378 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 58.6ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 15:00:52,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-02 15:00:52,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2021-05-02 15:00:52,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 76 states have (on average 1.25) internal successors, (95), 77 states have internal predecessors, (95), 31 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-02 15:00:52,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 155 transitions. [2021-05-02 15:00:52,391 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 155 transitions. Word has length 47 [2021-05-02 15:00:52,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:52,391 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 155 transitions. [2021-05-02 15:00:52,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 15:00:52,391 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 155 transitions. [2021-05-02 15:00:52,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 15:00:52,392 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:52,392 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:52,600 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:52,601 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:52,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:52,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1524769911, now seen corresponding path program 1 times [2021-05-02 15:00:52,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:52,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910688698] [2021-05-02 15:00:52,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:52,608 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:52,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1381828560] [2021-05-02 15:00:52,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:52,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:52,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 15:00:52,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:52,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:52,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:52,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:52,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:52,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:52,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:52,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:52,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:52,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:52,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:52,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:52,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:52,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:52,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:52,875 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 15:00:52,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:52,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910688698] [2021-05-02 15:00:52,875 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:52,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381828560] [2021-05-02 15:00:52,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381828560] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:52,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:52,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 15:00:52,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591359704] [2021-05-02 15:00:52,876 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 15:00:52,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:52,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 15:00:52,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:00:52,876 INFO L87 Difference]: Start difference. First operand 115 states and 155 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 15:00:53,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:53,053 INFO L93 Difference]: Finished difference Result 124 states and 163 transitions. [2021-05-02 15:00:53,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 15:00:53,054 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 47 [2021-05-02 15:00:53,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:53,055 INFO L225 Difference]: With dead ends: 124 [2021-05-02 15:00:53,055 INFO L226 Difference]: Without dead ends: 122 [2021-05-02 15:00:53,055 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 117.4ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-02 15:00:53,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-05-02 15:00:53,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 119. [2021-05-02 15:00:53,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 79 states have (on average 1.240506329113924) internal successors, (98), 80 states have internal predecessors, (98), 31 states have call successors, (31), 9 states have call predecessors, (31), 8 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-02 15:00:53,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 158 transitions. [2021-05-02 15:00:53,067 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 158 transitions. Word has length 47 [2021-05-02 15:00:53,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:53,067 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 158 transitions. [2021-05-02 15:00:53,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 15:00:53,068 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 158 transitions. [2021-05-02 15:00:53,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 15:00:53,068 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:53,068 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 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 15:00:53,285 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:53,286 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:53,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:53,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1836145722, now seen corresponding path program 2 times [2021-05-02 15:00:53,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:53,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640293799] [2021-05-02 15:00:53,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:53,293 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:53,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [452064581] [2021-05-02 15:00:53,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:53,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:00:53,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:00:53,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 15:00:53,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:53,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:53,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:53,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:53,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:53,405 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 15:00:53,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:53,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640293799] [2021-05-02 15:00:53,405 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:53,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452064581] [2021-05-02 15:00:53,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452064581] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:00:53,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:00:53,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 15:00:53,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299454052] [2021-05-02 15:00:53,406 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 15:00:53,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:53,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 15:00:53,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:00:53,407 INFO L87 Difference]: Start difference. First operand 119 states and 158 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 15:00:53,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:53,488 INFO L93 Difference]: Finished difference Result 168 states and 232 transitions. [2021-05-02 15:00:53,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 15:00:53,488 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 47 [2021-05-02 15:00:53,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:53,490 INFO L225 Difference]: With dead ends: 168 [2021-05-02 15:00:53,490 INFO L226 Difference]: Without dead ends: 130 [2021-05-02 15:00:53,491 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 15.7ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-02 15:00:53,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-05-02 15:00:53,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 104. [2021-05-02 15:00:53,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 68 states have (on average 1.1911764705882353) internal successors, (81), 69 states have internal predecessors, (81), 27 states have call successors, (27), 9 states have call predecessors, (27), 8 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 15:00:53,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 133 transitions. [2021-05-02 15:00:53,509 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 133 transitions. Word has length 47 [2021-05-02 15:00:53,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:53,510 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 133 transitions. [2021-05-02 15:00:53,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 15:00:53,510 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 133 transitions. [2021-05-02 15:00:53,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-02 15:00:53,513 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:53,513 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:53,729 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 15:00:53,729 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:53,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:53,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1952108775, now seen corresponding path program 1 times [2021-05-02 15:00:53,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:53,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523103726] [2021-05-02 15:00:53,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:53,737 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:53,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1083408617] [2021-05-02 15:00:53,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:53,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:53,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 15:00:53,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:53,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:53,873 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-05-02 15:00:53,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:53,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523103726] [2021-05-02 15:00:53,874 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:53,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083408617] [2021-05-02 15:00:53,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083408617] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:53,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:53,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 15:00:53,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638124351] [2021-05-02 15:00:53,876 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 15:00:53,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:53,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 15:00:53,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 15:00:53,876 INFO L87 Difference]: Start difference. First operand 104 states and 133 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-02 15:00:53,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:53,950 INFO L93 Difference]: Finished difference Result 154 states and 211 transitions. [2021-05-02 15:00:53,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:00:53,951 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 52 [2021-05-02 15:00:53,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:53,952 INFO L225 Difference]: With dead ends: 154 [2021-05-02 15:00:53,952 INFO L226 Difference]: Without dead ends: 152 [2021-05-02 15:00:53,952 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 23.7ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:00:53,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-05-02 15:00:53,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 133. [2021-05-02 15:00:53,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 76 states have (on average 1.1710526315789473) internal successors, (89), 82 states have internal predecessors, (89), 47 states have call successors, (47), 10 states have call predecessors, (47), 9 states have return successors, (45), 40 states have call predecessors, (45), 45 states have call successors, (45) [2021-05-02 15:00:53,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 181 transitions. [2021-05-02 15:00:53,974 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 181 transitions. Word has length 52 [2021-05-02 15:00:53,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:53,974 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 181 transitions. [2021-05-02 15:00:53,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-02 15:00:53,974 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 181 transitions. [2021-05-02 15:00:53,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-02 15:00:53,975 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:53,975 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1] [2021-05-02 15:00:54,176 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:54,177 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:54,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:54,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1926690588, now seen corresponding path program 1 times [2021-05-02 15:00:54,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:54,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21826807] [2021-05-02 15:00:54,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:54,184 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:54,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1811462831] [2021-05-02 15:00:54,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:54,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:54,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 15:00:54,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:54,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:54,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:54,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:54,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:54,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:54,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:54,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:54,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:54,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:54,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:54,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:54,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:54,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:54,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:54,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:54,409 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 15:00:54,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:54,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21826807] [2021-05-02 15:00:54,409 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:54,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811462831] [2021-05-02 15:00:54,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811462831] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:54,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:54,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 15:00:54,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674863132] [2021-05-02 15:00:54,410 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 15:00:54,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:54,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 15:00:54,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:00:54,411 INFO L87 Difference]: Start difference. First operand 133 states and 181 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 15:00:54,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:54,714 INFO L93 Difference]: Finished difference Result 185 states and 261 transitions. [2021-05-02 15:00:54,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 15:00:54,714 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 52 [2021-05-02 15:00:54,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:54,717 INFO L225 Difference]: With dead ends: 185 [2021-05-02 15:00:54,717 INFO L226 Difference]: Without dead ends: 183 [2021-05-02 15:00:54,718 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 152.1ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-05-02 15:00:54,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-05-02 15:00:54,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 148. [2021-05-02 15:00:54,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 82 states have (on average 1.170731707317073) internal successors, (96), 89 states have internal predecessors, (96), 55 states have call successors, (55), 11 states have call predecessors, (55), 10 states have return successors, (53), 47 states have call predecessors, (53), 53 states have call successors, (53) [2021-05-02 15:00:54,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 204 transitions. [2021-05-02 15:00:54,739 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 204 transitions. Word has length 52 [2021-05-02 15:00:54,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:54,739 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 204 transitions. [2021-05-02 15:00:54,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 15:00:54,739 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 204 transitions. [2021-05-02 15:00:54,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-02 15:00:54,740 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:54,740 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:54,945 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:54,945 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:54,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:54,945 INFO L82 PathProgramCache]: Analyzing trace with hash 188363668, now seen corresponding path program 1 times [2021-05-02 15:00:54,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:54,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075292361] [2021-05-02 15:00:54,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:54,953 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:54,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [439074860] [2021-05-02 15:00:54,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:55,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:55,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 60 conjunts are in the unsatisfiable core [2021-05-02 15:00:55,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:55,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:55,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:55,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:55,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:55,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:55,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:55,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:55,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:55,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:55,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:55,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:55,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:55,423 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-05-02 15:00:55,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:55,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075292361] [2021-05-02 15:00:55,424 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:55,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439074860] [2021-05-02 15:00:55,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439074860] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:55,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:55,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 15:00:55,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572021054] [2021-05-02 15:00:55,424 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 15:00:55,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:55,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 15:00:55,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-05-02 15:00:55,425 INFO L87 Difference]: Start difference. First operand 148 states and 204 transitions. Second operand has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 15:00:55,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:55,908 INFO L93 Difference]: Finished difference Result 261 states and 355 transitions. [2021-05-02 15:00:55,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 15:00:55,909 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 64 [2021-05-02 15:00:55,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:55,910 INFO L225 Difference]: With dead ends: 261 [2021-05-02 15:00:55,910 INFO L226 Difference]: Without dead ends: 185 [2021-05-02 15:00:55,912 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 404.2ms TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-05-02 15:00:55,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-05-02 15:00:55,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 183. [2021-05-02 15:00:55,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 106 states have (on average 1.1603773584905661) internal successors, (123), 113 states have internal predecessors, (123), 63 states have call successors, (63), 14 states have call predecessors, (63), 13 states have return successors, (61), 55 states have call predecessors, (61), 61 states have call successors, (61) [2021-05-02 15:00:55,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 247 transitions. [2021-05-02 15:00:55,935 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 247 transitions. Word has length 64 [2021-05-02 15:00:55,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:55,936 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 247 transitions. [2021-05-02 15:00:55,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 15:00:55,936 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 247 transitions. [2021-05-02 15:00:55,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 15:00:55,937 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:55,937 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:56,143 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 15:00:56,143 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:56,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:56,144 INFO L82 PathProgramCache]: Analyzing trace with hash -368004398, now seen corresponding path program 2 times [2021-05-02 15:00:56,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:56,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328896621] [2021-05-02 15:00:56,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:56,150 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:56,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [732503365] [2021-05-02 15:00:56,150 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:56,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:00:56,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:00:56,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 15:00:56,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:56,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:56,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:56,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:56,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:56,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:56,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:56,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:56,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:56,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:56,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:56,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:56,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:56,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:56,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:56,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:56,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:56,381 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-02 15:00:56,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:56,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328896621] [2021-05-02 15:00:56,382 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:56,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732503365] [2021-05-02 15:00:56,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732503365] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:56,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:56,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 15:00:56,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105882056] [2021-05-02 15:00:56,382 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:00:56,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:56,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:00:56,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:00:56,383 INFO L87 Difference]: Start difference. First operand 183 states and 247 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-02 15:00:56,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:56,748 INFO L93 Difference]: Finished difference Result 327 states and 483 transitions. [2021-05-02 15:00:56,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 15:00:56,749 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 69 [2021-05-02 15:00:56,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:56,751 INFO L225 Difference]: With dead ends: 327 [2021-05-02 15:00:56,751 INFO L226 Difference]: Without dead ends: 320 [2021-05-02 15:00:56,751 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 126.9ms TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-05-02 15:00:56,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-05-02 15:00:56,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 217. [2021-05-02 15:00:56,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 128 states have (on average 1.1953125) internal successors, (153), 134 states have internal predecessors, (153), 75 states have call successors, (75), 14 states have call predecessors, (75), 13 states have return successors, (73), 68 states have call predecessors, (73), 73 states have call successors, (73) [2021-05-02 15:00:56,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 301 transitions. [2021-05-02 15:00:56,782 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 301 transitions. Word has length 69 [2021-05-02 15:00:56,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:56,782 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 301 transitions. [2021-05-02 15:00:56,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-02 15:00:56,782 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 301 transitions. [2021-05-02 15:00:56,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 15:00:56,784 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:56,784 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:56,989 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 15:00:56,989 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:56,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:56,989 INFO L82 PathProgramCache]: Analyzing trace with hash -298771846, now seen corresponding path program 1 times [2021-05-02 15:00:56,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:56,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24154629] [2021-05-02 15:00:56,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:56,999 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:56,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1101558298] [2021-05-02 15:00:56,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:57,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:57,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 15:00:57,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:57,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:57,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:57,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:57,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:57,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:57,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:57,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:57,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:57,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:57,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:57,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:57,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:57,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:57,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:57,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:57,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:57,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:57,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:57,274 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-05-02 15:00:57,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:57,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24154629] [2021-05-02 15:00:57,275 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:57,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101558298] [2021-05-02 15:00:57,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101558298] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:57,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:57,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 15:00:57,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723302854] [2021-05-02 15:00:57,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 15:00:57,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:57,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 15:00:57,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:00:57,276 INFO L87 Difference]: Start difference. First operand 217 states and 301 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2021-05-02 15:00:57,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:57,506 INFO L93 Difference]: Finished difference Result 248 states and 343 transitions. [2021-05-02 15:00:57,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 15:00:57,506 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) Word has length 74 [2021-05-02 15:00:57,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:57,508 INFO L225 Difference]: With dead ends: 248 [2021-05-02 15:00:57,509 INFO L226 Difference]: Without dead ends: 246 [2021-05-02 15:00:57,509 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 113.6ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-02 15:00:57,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-05-02 15:00:57,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 236. [2021-05-02 15:00:57,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 137 states have (on average 1.1897810218978102) internal successors, (163), 144 states have internal predecessors, (163), 83 states have call successors, (83), 16 states have call predecessors, (83), 15 states have return successors, (81), 75 states have call predecessors, (81), 81 states have call successors, (81) [2021-05-02 15:00:57,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 327 transitions. [2021-05-02 15:00:57,528 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 327 transitions. Word has length 74 [2021-05-02 15:00:57,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:57,528 INFO L480 AbstractCegarLoop]: Abstraction has 236 states and 327 transitions. [2021-05-02 15:00:57,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2021-05-02 15:00:57,528 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 327 transitions. [2021-05-02 15:00:57,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-02 15:00:57,529 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:57,529 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1] [2021-05-02 15:00:57,744 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 15:00:57,744 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:57,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:57,744 INFO L82 PathProgramCache]: Analyzing trace with hash -2089538094, now seen corresponding path program 1 times [2021-05-02 15:00:57,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:57,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192399442] [2021-05-02 15:00:57,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:57,753 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:57,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [136939139] [2021-05-02 15:00:57,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:57,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:57,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 15:00:57,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:57,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:57,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:57,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:57,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:57,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:57,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:57,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:57,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:57,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:57,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:58,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:58,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:58,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:58,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:58,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:58,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:58,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:58,250 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-05-02 15:00:58,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:58,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192399442] [2021-05-02 15:00:58,251 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:58,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136939139] [2021-05-02 15:00:58,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136939139] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:58,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:58,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 15:00:58,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939304967] [2021-05-02 15:00:58,252 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 15:00:58,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:58,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 15:00:58,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-05-02 15:00:58,253 INFO L87 Difference]: Start difference. First operand 236 states and 327 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 15 states have internal predecessors, (40), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 15:00:59,318 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-05-02 15:00:59,540 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 28 [2021-05-02 15:00:59,892 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-05-02 15:01:00,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:01:00,970 INFO L93 Difference]: Finished difference Result 371 states and 534 transitions. [2021-05-02 15:01:00,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-02 15:01:00,971 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 15 states have internal predecessors, (40), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 72 [2021-05-02 15:01:00,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:01:00,974 INFO L225 Difference]: With dead ends: 371 [2021-05-02 15:01:00,974 INFO L226 Difference]: Without dead ends: 369 [2021-05-02 15:01:00,977 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1829.4ms TimeCoverageRelationStatistics Valid=417, Invalid=1935, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 15:01:00,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-05-02 15:01:01,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 345. [2021-05-02 15:01:01,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 196 states have (on average 1.2142857142857142) internal successors, (238), 208 states have internal predecessors, (238), 131 states have call successors, (131), 18 states have call predecessors, (131), 17 states have return successors, (129), 118 states have call predecessors, (129), 129 states have call successors, (129) [2021-05-02 15:01:01,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 498 transitions. [2021-05-02 15:01:01,033 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 498 transitions. Word has length 72 [2021-05-02 15:01:01,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:01:01,033 INFO L480 AbstractCegarLoop]: Abstraction has 345 states and 498 transitions. [2021-05-02 15:01:01,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 15 states have internal predecessors, (40), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 15:01:01,033 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 498 transitions. [2021-05-02 15:01:01,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-02 15:01:01,035 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:01:01,035 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 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, 1, 1] [2021-05-02 15:01:01,248 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:01:01,249 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:01:01,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:01:01,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1984914564, now seen corresponding path program 2 times [2021-05-02 15:01:01,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:01:01,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515309811] [2021-05-02 15:01:01,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:01:01,254 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:01:01,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [360801360] [2021-05-02 15:01:01,255 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:01:01,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:01:01,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:01:01,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-02 15:01:01,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:01:01,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:01,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:01,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:01,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:01,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:01,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:01,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:01,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:01,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:01,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:01,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:01,413 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 15:01:01,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:01:01,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515309811] [2021-05-02 15:01:01,413 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:01:01,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360801360] [2021-05-02 15:01:01,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360801360] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:01:01,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:01:01,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 15:01:01,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682301511] [2021-05-02 15:01:01,414 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 15:01:01,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:01:01,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 15:01:01,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:01:01,415 INFO L87 Difference]: Start difference. First operand 345 states and 498 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-02 15:01:01,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:01:01,473 INFO L93 Difference]: Finished difference Result 585 states and 842 transitions. [2021-05-02 15:01:01,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 15:01:01,473 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 77 [2021-05-02 15:01:01,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:01:01,475 INFO L225 Difference]: With dead ends: 585 [2021-05-02 15:01:01,475 INFO L226 Difference]: Without dead ends: 326 [2021-05-02 15:01:01,478 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 14.8ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:01:01,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-05-02 15:01:01,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 299. [2021-05-02 15:01:01,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 175 states have (on average 1.2) internal successors, (210), 178 states have internal predecessors, (210), 107 states have call successors, (107), 17 states have call predecessors, (107), 16 states have return successors, (105), 103 states have call predecessors, (105), 105 states have call successors, (105) [2021-05-02 15:01:01,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 422 transitions. [2021-05-02 15:01:01,508 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 422 transitions. Word has length 77 [2021-05-02 15:01:01,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:01:01,508 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 422 transitions. [2021-05-02 15:01:01,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-02 15:01:01,508 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 422 transitions. [2021-05-02 15:01:01,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-02 15:01:01,509 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:01:01,509 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 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, 1, 1] [2021-05-02 15:01:01,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 15:01:01,728 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:01:01,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:01:01,729 INFO L82 PathProgramCache]: Analyzing trace with hash 2139677040, now seen corresponding path program 3 times [2021-05-02 15:01:01,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:01:01,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372943818] [2021-05-02 15:01:01,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:01:01,738 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:01:01,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [865803674] [2021-05-02 15:01:01,739 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 [2021-05-02 15:01:01,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 15:01:01,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:01:01,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-02 15:01:01,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:01:01,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:01,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:01,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:01,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:01,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:01,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:01,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:01,905 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-05-02 15:01:01,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:01:01,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372943818] [2021-05-02 15:01:01,905 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:01:01,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865803674] [2021-05-02 15:01:01,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865803674] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:01:01,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:01:01,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 15:01:01,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646964456] [2021-05-02 15:01:01,906 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 15:01:01,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:01:01,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 15:01:01,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 15:01:01,906 INFO L87 Difference]: Start difference. First operand 299 states and 422 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-05-02 15:01:02,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:01:02,021 INFO L93 Difference]: Finished difference Result 342 states and 489 transitions. [2021-05-02 15:01:02,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:01:02,022 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 77 [2021-05-02 15:01:02,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:01:02,023 INFO L225 Difference]: With dead ends: 342 [2021-05-02 15:01:02,023 INFO L226 Difference]: Without dead ends: 340 [2021-05-02 15:01:02,024 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 30.3ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:01:02,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-05-02 15:01:02,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 333. [2021-05-02 15:01:02,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 188 states have (on average 1.2127659574468086) internal successors, (228), 191 states have internal predecessors, (228), 127 states have call successors, (127), 18 states have call predecessors, (127), 17 states have return successors, (125), 123 states have call predecessors, (125), 125 states have call successors, (125) [2021-05-02 15:01:02,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 480 transitions. [2021-05-02 15:01:02,054 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 480 transitions. Word has length 77 [2021-05-02 15:01:02,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:01:02,054 INFO L480 AbstractCegarLoop]: Abstraction has 333 states and 480 transitions. [2021-05-02 15:01:02,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-05-02 15:01:02,055 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 480 transitions. [2021-05-02 15:01:02,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-02 15:01:02,055 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:01:02,055 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 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, 1, 1] [2021-05-02 15:01:02,260 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 15:01:02,261 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:01:02,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:01:02,261 INFO L82 PathProgramCache]: Analyzing trace with hash -867272991, now seen corresponding path program 4 times [2021-05-02 15:01:02,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:01:02,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219624183] [2021-05-02 15:01:02,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:01:02,266 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:01:02,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1612802683] [2021-05-02 15:01:02,266 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:01:02,315 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 15:01:02,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:01:02,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 87 conjunts are in the unsatisfiable core [2021-05-02 15:01:02,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:01:02,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:02,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:02,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:02,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:02,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:02,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:02,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:02,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:02,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:02,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:02,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:02,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:02,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:02,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:02,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:02,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:01:02,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219624183] [2021-05-02 15:01:02,983 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:01:02,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612802683] [2021-05-02 15:01:02,983 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Infinite/NaN value [2021-05-02 15:01:02,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:01:02,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-05-02 15:01:02,983 ERROR L212 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-05-02 15:01:02,983 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 15:01:03,201 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 15:01:03,214 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-02 15:01:03,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 03:01:03 BoogieIcfgContainer [2021-05-02 15:01:03,214 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 15:01:03,215 INFO L168 Benchmark]: Toolchain (without parser) took 15023.80 ms. Allocated memory was 203.4 MB in the beginning and 352.3 MB in the end (delta: 148.9 MB). Free memory was 167.0 MB in the beginning and 313.0 MB in the end (delta: -146.0 MB). Peak memory consumption was 191.5 MB. Max. memory is 8.0 GB. [2021-05-02 15:01:03,215 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 203.4 MB. Free memory is still 184.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 15:01:03,215 INFO L168 Benchmark]: CACSL2BoogieTranslator took 249.05 ms. Allocated memory is still 203.4 MB. Free memory was 166.7 MB in the beginning and 185.8 MB in the end (delta: -19.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-05-02 15:01:03,215 INFO L168 Benchmark]: Boogie Preprocessor took 35.46 ms. Allocated memory is still 203.4 MB. Free memory was 185.8 MB in the beginning and 184.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 15:01:03,215 INFO L168 Benchmark]: RCFGBuilder took 321.75 ms. Allocated memory is still 203.4 MB. Free memory was 184.1 MB in the beginning and 167.3 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-02 15:01:03,215 INFO L168 Benchmark]: TraceAbstraction took 14412.16 ms. Allocated memory was 203.4 MB in the beginning and 352.3 MB in the end (delta: 148.9 MB). Free memory was 166.8 MB in the beginning and 313.0 MB in the end (delta: -146.2 MB). Peak memory consumption was 191.5 MB. Max. memory is 8.0 GB. [2021-05-02 15:01:03,215 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 203.4 MB. Free memory is still 184.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 249.05 ms. Allocated memory is still 203.4 MB. Free memory was 166.7 MB in the beginning and 185.8 MB in the end (delta: -19.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 35.46 ms. Allocated memory is still 203.4 MB. Free memory was 185.8 MB in the beginning and 184.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 321.75 ms. Allocated memory is still 203.4 MB. Free memory was 184.1 MB in the beginning and 167.3 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 14412.16 ms. Allocated memory was 203.4 MB in the beginning and 352.3 MB in the end (delta: 148.9 MB). Free memory was 166.8 MB in the beginning and 313.0 MB in the end (delta: -146.2 MB). Peak memory consumption was 191.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L19] int x, y; [L20] long long a, b, p, q, r, s; [L21] x = __VERIFIER_nondet_int() [L22] CALL assume_abort_if_not(x>=0 && x<=20) [L8] COND FALSE !(!cond) [L22] RET assume_abort_if_not(x>=0 && x<=20) [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(y>=0 && y<=20) [L8] COND FALSE !(!cond) [L24] RET assume_abort_if_not(y>=0 && y<=20) [L25] CALL assume_abort_if_not(x >= 1) [L8] COND FALSE !(!cond) [L25] RET assume_abort_if_not(x >= 1) [L26] CALL assume_abort_if_not(y >= 1) [L8] COND FALSE !(!cond) [L26] RET assume_abort_if_not(y >= 1) [L28] a = x [L29] b = y [L30] p = 1 [L31] q = 0 [L32] r = 0 [L33] s = 1 [L35] COND TRUE 1 [L36] COND FALSE !(!(b != 0)) [L38] long long c, k; [L39] c = a [L40] k = 0 [L42] COND TRUE 1 [L43] COND TRUE !(c >= b) [L64] a = b [L65] b = c [L66] long long temp; [L67] temp = p [L68] p = q [L69] q = temp - q * k [L70] temp = r [L71] r = s [L72] s = temp - s * k [L35] COND TRUE 1 [L36] COND FALSE !(!(b != 0)) [L38] long long c, k; [L39] c = a [L40] k = 0 [L42] COND TRUE 1 [L43] COND FALSE !(!(c >= b)) [L45] long long d, v; [L46] d = 1 [L47] v = b [L49] COND TRUE 1 [L50] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L50] RET __VERIFIER_assert(a == y * r + x * p) [L51] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L51] RET __VERIFIER_assert(b == x * q + y * s) [L52] CALL __VERIFIER_assert(a == k * b + c) [L11] COND FALSE !(!(cond)) [L52] RET __VERIFIER_assert(a == k * b + c) [L53] CALL __VERIFIER_assert(v == b * d) [L11] COND FALSE !(!(cond)) [L53] RET __VERIFIER_assert(v == b * d) [L55] COND TRUE !(c >= 2 * v) [L60] c = c - v [L61] k = k + d [L42] COND TRUE 1 [L43] COND TRUE !(c >= b) [L64] a = b [L65] b = c [L66] long long temp; [L67] temp = p [L68] p = q [L69] q = temp - q * k [L70] temp = r [L71] r = s [L72] s = temp - s * k [L35] COND TRUE 1 [L36] COND FALSE !(!(b != 0)) [L38] long long c, k; [L39] c = a [L40] k = 0 [L42] COND TRUE 1 [L43] COND FALSE !(!(c >= b)) [L45] long long d, v; [L46] d = 1 [L47] v = b [L49] COND TRUE 1 [L50] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L50] RET __VERIFIER_assert(a == y * r + x * p) [L51] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND TRUE !(cond) [L13] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 14370.2ms, OverallIterations: 18, TraceHistogramMax: 8, EmptinessCheckTime: 21.1ms, AutomataDifference: 5575.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 806 SDtfs, 788 SDslu, 3477 SDs, 0 SdLazy, 3330 SolverSat, 669 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2243.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 968 GetRequests, 758 SyntacticMatches, 1 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 3191.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=345occurred in iteration=15, InterpolantAutomatonStates: 186, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 352.8ms AutomataMinimizationTime, 17 MinimizatonAttempts, 299 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 133.8ms SsaConstructionTime, 376.9ms SatisfiabilityAnalysisTime, 3001.6ms InterpolantComputationTime, 905 NumberOfCodeBlocks, 864 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 888 ConstructedInterpolants, 0 QuantifiedInterpolants, 3541 SizeOfPredicates, 72 NumberOfNonLiveVariables, 3009 ConjunctsInSsa, 343 ConjunctsInUnsatCore, 17 InterpolantComputations, 5 PerfectInterpolantSequences, 749/878 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...