/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 15:25:18,726 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 15:25:18,727 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 15:25:18,770 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 15:25:18,789 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 15:25:18,791 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 15:25:18,792 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 15:25:18,793 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 15:25:18,794 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 15:25:18,794 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 15:25:18,807 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 15:25:18,808 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 15:25:18,818 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 15:25:18,819 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 15:25:18,820 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 15:25:18,822 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 15:25:18,827 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 15:25:18,833 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 15:25:18,833 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 15:25:18,834 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 15:25:18,834 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 15:25:18,862 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 15:25:18,862 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 15:25:18,865 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 15:25:18,865 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 15:25:18,865 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 15:25:18,865 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 15:25:18,865 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 15:25:18,865 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 15:25:18,865 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 15:25:18,865 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 15:25:18,866 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 15:25:18,866 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 15:25:18,866 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 15:25:18,866 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 15:25:18,866 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 15:25:18,866 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 15:25:18,867 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 15:25:18,867 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 15:25:18,867 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 15:25:18,867 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 15:25:18,867 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:25:18,867 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 15:25:18,867 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 15:25:18,867 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 15:25:18,867 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 15:25:18,868 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 15:25:18,868 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 15:25:18,868 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 15:25:18,868 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 15:25:19,149 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 15:25:19,162 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 15:25:19,164 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 15:25:19,165 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 15:25:19,166 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 15:25:19,166 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound1.c [2021-05-02 15:25:19,217 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b08d8049d/11141a2872154d0cb924cf4fead9c32c/FLAGc9dfd5a92 [2021-05-02 15:25:19,574 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 15:25:19,574 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound1.c [2021-05-02 15:25:19,578 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b08d8049d/11141a2872154d0cb924cf4fead9c32c/FLAGc9dfd5a92 [2021-05-02 15:25:19,587 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b08d8049d/11141a2872154d0cb924cf4fead9c32c [2021-05-02 15:25:19,588 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 15:25:19,589 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 15:25:19,590 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 15:25:19,590 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 15:25:19,593 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 15:25:19,593 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:25:19" (1/1) ... [2021-05-02 15:25:19,594 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38ae79bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:25:19, skipping insertion in model container [2021-05-02 15:25:19,594 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:25:19" (1/1) ... [2021-05-02 15:25:19,598 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 15:25:19,606 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 15:25:19,735 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound1.c[546,559] [2021-05-02 15:25:19,751 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:25:19,756 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 15:25:19,766 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound1.c[546,559] [2021-05-02 15:25:19,782 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:25:19,798 INFO L208 MainTranslator]: Completed translation [2021-05-02 15:25:19,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:25:19 WrapperNode [2021-05-02 15:25:19,799 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 15:25:19,800 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 15:25:19,801 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 15:25:19,801 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 15:25:19,809 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:25:19" (1/1) ... [2021-05-02 15:25:19,809 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:25:19" (1/1) ... [2021-05-02 15:25:19,830 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:25:19" (1/1) ... [2021-05-02 15:25:19,830 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:25:19" (1/1) ... [2021-05-02 15:25:19,845 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:25:19" (1/1) ... [2021-05-02 15:25:19,851 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:25:19" (1/1) ... [2021-05-02 15:25:19,858 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:25:19" (1/1) ... [2021-05-02 15:25:19,860 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 15:25:19,860 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 15:25:19,860 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 15:25:19,860 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 15:25:19,861 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:25:19" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:25:19,915 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 15:25:19,915 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 15:25:19,915 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 15:25:19,915 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 15:25:19,915 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 15:25:19,916 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 15:25:19,916 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 15:25:19,916 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 15:25:19,916 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 15:25:19,916 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 15:25:19,916 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 15:25:19,917 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 15:25:19,917 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 15:25:19,917 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 15:25:19,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 15:25:19,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 15:25:19,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 15:25:19,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 15:25:19,918 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 15:25:19,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 15:25:20,161 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 15:25:20,161 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 15:25:20,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:25:20 BoogieIcfgContainer [2021-05-02 15:25:20,162 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 15:25:20,163 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 15:25:20,163 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 15:25:20,167 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 15:25:20,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 03:25:19" (1/3) ... [2021-05-02 15:25:20,167 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6340c66b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:25:20, skipping insertion in model container [2021-05-02 15:25:20,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:25:19" (2/3) ... [2021-05-02 15:25:20,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6340c66b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:25:20, skipping insertion in model container [2021-05-02 15:25:20,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:25:20" (3/3) ... [2021-05-02 15:25:20,169 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_unwindbound1.c [2021-05-02 15:25:20,172 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 15:25:20,174 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 15:25:20,185 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 15:25:20,199 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 15:25:20,199 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 15:25:20,199 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 15:25:20,199 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 15:25:20,199 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 15:25:20,199 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 15:25:20,199 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 15:25:20,199 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 15:25:20,209 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 15:25:20,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 15:25:20,212 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:20,212 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:25:20,213 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:20,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:20,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1191571617, now seen corresponding path program 1 times [2021-05-02 15:25:20,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:20,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783308674] [2021-05-02 15:25:20,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:20,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:20,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:25:20,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:20,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:25:20,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:20,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:25:20,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:20,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783308674] [2021-05-02 15:25:20,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783308674] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:25:20,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:25:20,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 15:25:20,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644561677] [2021-05-02 15:25:20,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 15:25:20,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:20,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 15:25:20,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:25:20,387 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 15:25:20,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:20,510 INFO L93 Difference]: Finished difference Result 66 states and 101 transitions. [2021-05-02 15:25:20,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 15:25:20,512 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-02 15:25:20,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:20,517 INFO L225 Difference]: With dead ends: 66 [2021-05-02 15:25:20,517 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 15:25:20,519 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:25:20,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 15:25:20,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-05-02 15:25:20,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 15:25:20,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-02 15:25:20,544 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2021-05-02 15:25:20,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:20,544 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-02 15:25:20,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 15:25:20,545 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-02 15:25:20,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 15:25:20,545 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:20,545 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:25:20,561 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 15:25:20,561 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:20,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:20,562 INFO L82 PathProgramCache]: Analyzing trace with hash 336486197, now seen corresponding path program 1 times [2021-05-02 15:25:20,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:20,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179427858] [2021-05-02 15:25:20,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:20,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:20,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:25:20,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:20,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:25:20,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:20,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:25:20,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:20,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179427858] [2021-05-02 15:25:20,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179427858] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:25:20,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:25:20,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 15:25:20,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795460136] [2021-05-02 15:25:20,738 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:25:20,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:20,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:25:20,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:25:20,739 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 15:25:21,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:21,019 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2021-05-02 15:25:21,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:25:21,019 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-02 15:25:21,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:21,021 INFO L225 Difference]: With dead ends: 47 [2021-05-02 15:25:21,022 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 15:25:21,023 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 156.9ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:25:21,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 15:25:21,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2021-05-02 15:25:21,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 15:25:21,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2021-05-02 15:25:21,044 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 18 [2021-05-02 15:25:21,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:21,045 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2021-05-02 15:25:21,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 15:25:21,045 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2021-05-02 15:25:21,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 15:25:21,046 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:21,046 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:25:21,046 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 15:25:21,047 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:21,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:21,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1819267188, now seen corresponding path program 1 times [2021-05-02 15:25:21,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:21,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221522443] [2021-05-02 15:25:21,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:21,061 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:25:21,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1636854733] [2021-05-02 15:25:21,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:25:21,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:21,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 15:25:21,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:25:21,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:21,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:21,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:21,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:21,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:21,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:25:21,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:21,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221522443] [2021-05-02 15:25:21,195 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:25:21,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636854733] [2021-05-02 15:25:21,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636854733] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:25:21,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:25:21,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 15:25:21,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691936157] [2021-05-02 15:25:21,196 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 15:25:21,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:21,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 15:25:21,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 15:25:21,212 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 15:25:21,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:21,226 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2021-05-02 15:25:21,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 15:25:21,226 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-02 15:25:21,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:21,227 INFO L225 Difference]: With dead ends: 52 [2021-05-02 15:25:21,227 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 15:25:21,227 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 15:25:21,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 15:25:21,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-02 15:25:21,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 15:25:21,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2021-05-02 15:25:21,232 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 20 [2021-05-02 15:25:21,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:21,233 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2021-05-02 15:25:21,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 15:25:21,233 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2021-05-02 15:25:21,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 15:25:21,233 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:21,233 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:25:21,445 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 15:25:21,445 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:21,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:21,446 INFO L82 PathProgramCache]: Analyzing trace with hash -784889968, now seen corresponding path program 1 times [2021-05-02 15:25:21,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:21,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865009801] [2021-05-02 15:25:21,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:21,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:21,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:25:21,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:21,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:25:21,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:21,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 15:25:21,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:21,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:25:21,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:21,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865009801] [2021-05-02 15:25:21,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865009801] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:25:21,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:25:21,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 15:25:21,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336449880] [2021-05-02 15:25:21,563 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:25:21,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:21,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:25:21,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:25:21,564 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:25:21,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:21,824 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2021-05-02 15:25:21,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:25:21,825 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 15:25:21,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:21,825 INFO L225 Difference]: With dead ends: 52 [2021-05-02 15:25:21,825 INFO L226 Difference]: Without dead ends: 50 [2021-05-02 15:25:21,826 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 157.0ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:25:21,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-02 15:25:21,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2021-05-02 15:25:21,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 15:25:21,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2021-05-02 15:25:21,830 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2021-05-02 15:25:21,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:21,830 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2021-05-02 15:25:21,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:25:21,830 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2021-05-02 15:25:21,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 15:25:21,831 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:21,831 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:25:21,831 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 15:25:21,831 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:21,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:21,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1024624683, now seen corresponding path program 1 times [2021-05-02 15:25:21,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:21,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554102855] [2021-05-02 15:25:21,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:21,854 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:25:21,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [711682114] [2021-05-02 15:25:21,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:25:21,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:21,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 15:25:21,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:25:22,032 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 15:25:22,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:22,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554102855] [2021-05-02 15:25:22,033 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:25:22,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711682114] [2021-05-02 15:25:22,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711682114] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:25:22,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:25:22,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 15:25:22,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407815077] [2021-05-02 15:25:22,034 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:25:22,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:22,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:25:22,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:25:22,034 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 15:25:22,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:22,156 INFO L93 Difference]: Finished difference Result 75 states and 96 transitions. [2021-05-02 15:25:22,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:25:22,157 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2021-05-02 15:25:22,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:22,158 INFO L225 Difference]: With dead ends: 75 [2021-05-02 15:25:22,158 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 15:25:22,158 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 48.2ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:25:22,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 15:25:22,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-05-02 15:25:22,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 38 states have internal predecessors, (44), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 15:25:22,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 73 transitions. [2021-05-02 15:25:22,164 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 73 transitions. Word has length 28 [2021-05-02 15:25:22,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:22,164 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 73 transitions. [2021-05-02 15:25:22,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 15:25:22,164 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 73 transitions. [2021-05-02 15:25:22,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 15:25:22,165 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:22,165 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:25:22,380 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:25:22,380 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:22,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:22,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1301357193, now seen corresponding path program 1 times [2021-05-02 15:25:22,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:22,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805432862] [2021-05-02 15:25:22,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:22,389 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:25:22,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [269200582] [2021-05-02 15:25:22,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:25:22,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:22,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 15:25:22,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:25:22,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:22,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:22,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:22,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:22,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:22,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:22,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:22,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:22,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:22,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:22,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:22,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:22,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:22,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:22,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:22,663 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 15:25:22,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:22,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805432862] [2021-05-02 15:25:22,664 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:25:22,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269200582] [2021-05-02 15:25:22,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269200582] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:25:22,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:25:22,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 15:25:22,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757820077] [2021-05-02 15:25:22,664 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 15:25:22,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:22,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 15:25:22,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:25:22,665 INFO L87 Difference]: Start difference. First operand 60 states and 73 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:25:22,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:22,777 INFO L93 Difference]: Finished difference Result 70 states and 81 transitions. [2021-05-02 15:25:22,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 15:25:22,778 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2021-05-02 15:25:22,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:22,779 INFO L225 Difference]: With dead ends: 70 [2021-05-02 15:25:22,779 INFO L226 Difference]: Without dead ends: 58 [2021-05-02 15:25:22,779 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 88.4ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 15:25:22,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-02 15:25:22,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-05-02 15:25:22,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 37 states have internal predecessors, (42), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 15:25:22,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2021-05-02 15:25:22,786 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 36 [2021-05-02 15:25:22,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:22,786 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2021-05-02 15:25:22,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:25:22,786 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2021-05-02 15:25:22,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 15:25:22,787 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:22,787 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:25:23,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:25:23,001 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:23,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:23,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1189074514, now seen corresponding path program 1 times [2021-05-02 15:25:23,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:23,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558470176] [2021-05-02 15:25:23,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:23,008 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:25:23,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [264120785] [2021-05-02 15:25:23,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:25:23,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:23,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 15:25:23,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:25:23,153 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-02 15:25:23,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:23,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558470176] [2021-05-02 15:25:23,154 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:25:23,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264120785] [2021-05-02 15:25:23,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264120785] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:25:23,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:25:23,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 15:25:23,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793783469] [2021-05-02 15:25:23,154 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 15:25:23,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:23,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 15:25:23,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 15:25:23,155 INFO L87 Difference]: Start difference. First operand 58 states and 66 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:25:23,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:23,247 INFO L93 Difference]: Finished difference Result 72 states and 85 transitions. [2021-05-02 15:25:23,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:25:23,248 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, (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 38 [2021-05-02 15:25:23,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:23,249 INFO L225 Difference]: With dead ends: 72 [2021-05-02 15:25:23,249 INFO L226 Difference]: Without dead ends: 70 [2021-05-02 15:25:23,249 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 35.2ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:25:23,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-05-02 15:25:23,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2021-05-02 15:25:23,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 45 states have internal predecessors, (52), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 15:25:23,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 82 transitions. [2021-05-02 15:25:23,255 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 82 transitions. Word has length 38 [2021-05-02 15:25:23,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:23,255 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 82 transitions. [2021-05-02 15:25:23,255 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:25:23,255 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 82 transitions. [2021-05-02 15:25:23,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 15:25:23,256 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:23,256 INFO L523 BasicCegarLoop]: trace histogram [5, 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 15:25:23,471 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:25:23,471 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:23,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:23,471 INFO L82 PathProgramCache]: Analyzing trace with hash 817878903, now seen corresponding path program 1 times [2021-05-02 15:25:23,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:23,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860240893] [2021-05-02 15:25:23,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:23,477 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:25:23,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2124134346] [2021-05-02 15:25:23,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:25:23,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 15:25:23,521 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 15:25:23,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 15:25:23,534 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 15:25:23,591 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-02 15:25:23,591 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 15:25:23,791 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:25:23,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 03:25:23 BoogieIcfgContainer [2021-05-02 15:25:23,819 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 15:25:23,820 INFO L168 Benchmark]: Toolchain (without parser) took 4230.37 ms. Allocated memory was 184.5 MB in the beginning and 230.7 MB in the end (delta: 46.1 MB). Free memory was 150.2 MB in the beginning and 87.1 MB in the end (delta: 63.1 MB). Peak memory consumption was 110.2 MB. Max. memory is 8.0 GB. [2021-05-02 15:25:23,820 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 184.5 MB. Free memory is still 166.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 15:25:23,820 INFO L168 Benchmark]: CACSL2BoogieTranslator took 208.58 ms. Allocated memory is still 184.5 MB. Free memory was 150.0 MB in the beginning and 140.1 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 15:25:23,820 INFO L168 Benchmark]: Boogie Preprocessor took 59.41 ms. Allocated memory is still 184.5 MB. Free memory was 140.1 MB in the beginning and 168.0 MB in the end (delta: -27.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. [2021-05-02 15:25:23,820 INFO L168 Benchmark]: RCFGBuilder took 301.89 ms. Allocated memory is still 184.5 MB. Free memory was 168.0 MB in the beginning and 151.7 MB in the end (delta: 16.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-02 15:25:23,820 INFO L168 Benchmark]: TraceAbstraction took 3656.04 ms. Allocated memory was 184.5 MB in the beginning and 230.7 MB in the end (delta: 46.1 MB). Free memory was 151.7 MB in the beginning and 87.1 MB in the end (delta: 64.6 MB). Peak memory consumption was 112.3 MB. Max. memory is 8.0 GB. [2021-05-02 15:25:23,820 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 184.5 MB. Free memory is still 166.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 208.58 ms. Allocated memory is still 184.5 MB. Free memory was 150.0 MB in the beginning and 140.1 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 59.41 ms. Allocated memory is still 184.5 MB. Free memory was 140.1 MB in the beginning and 168.0 MB in the end (delta: -27.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. * RCFGBuilder took 301.89 ms. Allocated memory is still 184.5 MB. Free memory was 168.0 MB in the beginning and 151.7 MB in the end (delta: 16.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3656.04 ms. Allocated memory was 184.5 MB in the beginning and 230.7 MB in the end (delta: 46.1 MB). Free memory was 151.7 MB in the beginning and 87.1 MB in the end (delta: 64.6 MB). Peak memory consumption was 112.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; VAL [\old(counter)=16, counter=0] [L24] unsigned int A, B; [L25] long long r, d, p, q; [L26] A = __VERIFIER_nondet_unsigned_int() [L27] B = __VERIFIER_nondet_unsigned_int() [L28] CALL assume_abort_if_not(B >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L12] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L28] RET assume_abort_if_not(B >= 1) VAL [\old(counter)=0, B=4294967295, counter=0] [L30] r = A [L31] d = B [L32] p = 1 [L33] q = 0 VAL [\old(counter)=0, A=8589934591, B=4294967295, counter=0, d=4294967295, p=1, q=0, r=4294967295] [L35] EXPR counter++ VAL [\old(counter)=0, A=8589934591, B=4294967295, counter=1, counter++=0, d=4294967295, p=1, q=0, r=4294967295] [L35] COND TRUE counter++<1 [L36] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L36] RET __VERIFIER_assert(q == 0) VAL [\old(counter)=0, A=8589934591, B=4294967295, counter=1, d=4294967295, p=1, q=0, r=4294967295] [L37] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L37] RET __VERIFIER_assert(r == A) VAL [\old(counter)=0, A=8589934591, B=4294967295, counter=1, d=4294967295, p=1, q=0, r=4294967295] [L38] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L38] RET __VERIFIER_assert(d == B * p) VAL [\old(counter)=0, A=8589934591, B=4294967295, counter=1, d=4294967295, p=1, q=0, r=4294967295] [L39] COND FALSE !(!(r >= d)) [L41] d = 2 * d [L42] p = 2 * p VAL [\old(counter)=0, A=8589934591, B=4294967295, counter=1, d=8589934590, p=2, q=0, r=4294967295] [L35] EXPR counter++ VAL [\old(counter)=0, A=8589934591, B=4294967295, counter=2, counter++=1, d=8589934590, p=2, q=0, r=4294967295] [L35] COND FALSE !(counter++<1) [L45] EXPR counter++ VAL [\old(counter)=0, A=8589934591, B=4294967295, counter=3, counter++=2, d=8589934590, p=2, q=0, r=4294967295] [L45] COND FALSE !(counter++<1) [L59] CALL __VERIFIER_assert(A == d*q + r) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L59] RET __VERIFIER_assert(A == d*q + r) VAL [\old(counter)=0, A=8589934591, B=4294967295, counter=3, d=8589934590, p=2, q=0, r=4294967295] [L60] CALL __VERIFIER_assert(B == d) VAL [\old(cond)=0, \old(counter)=0, counter=3] [L15] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] [L17] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3594.9ms, OverallIterations: 8, TraceHistogramMax: 5, EmptinessCheckTime: 9.0ms, AutomataDifference: 1051.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 257 SDtfs, 131 SDslu, 672 SDs, 0 SdLazy, 507 SolverSat, 62 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 482.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 161 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 521.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=69occurred in iteration=7, InterpolantAutomatonStates: 46, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 64.6ms AutomataMinimizationTime, 7 MinimizatonAttempts, 19 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 48.1ms SsaConstructionTime, 153.4ms SatisfiabilityAnalysisTime, 876.6ms InterpolantComputationTime, 224 NumberOfCodeBlocks, 224 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 174 ConstructedInterpolants, 0 QuantifiedInterpolants, 704 SizeOfPredicates, 11 NumberOfNonLiveVariables, 550 ConjunctsInSsa, 56 ConjunctsInUnsatCore, 7 InterpolantComputations, 5 PerfectInterpolantSequences, 37/48 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 proved your program to be incorrect! Received shutdown request...